Quiet quasar has apparently eaten its fill

January 8, 2016, University of Washington
Artist's conception of the "changing-look quasar" as is appared in early 2015. The glowing blue region shows the last of the gas being swallowed by central black hole as it shuts off. The spectrum is the previous one obtained by the SDSS in 2003. Credit: Dana Berry / SkyWorks Digital, Inc.

Astronomers with the Sloan Digital Sky Survey (SDSS) announced that a distant quasar ran out of gas.

Their conclusions, reported Jan. 8 at the American Astronomical Society meeting in Kissimmee, Florida, clarify why quasar SDSS J1011+5442 changed so dramatically in the handful of years between observations.

"We are used to thinking of the sky as unchanging," said University of Washington astronomy professor Scott Anderson, who is principal investigator of the SDSS's Time-Domain Spectroscopic Survey. "The SDSS gives us a great opportunity to see that change as it happens."

Quasars are the compact area at the center of large galaxies, usually surrounding a . The black hole at the center of J1011+5442, for example, is some 50 million times more massive than our sun. As the black hole gobbles up superheated gas, it emits vast amounts of light and radio waves. When SDSS astronomers made their first observations of J1011+5442 in 2003, they measured the spectrum of the quasar, which let them understand the properties of the gas being swallowed by the black hole. In particular, the prominent "hydrogen-alpha" line in the spectrum revealed how much gas was falling into the central black hole.

The SDSS measured another spectrum for this quasar in early 2015, and noticed a huge decrease between 2003 and 2015. The team made use of additional observations by other telescopes over those 12 years to narrow down the period of change.

"The difference was stunning and unprecedented," said UW astronomy graduate student John Ruan, a member of the research team. "The hydrogen-alpha emission dropped by a factor of 50 in less than 12 years, and the quasar now looks like a normal galaxy."

This animation shows an artist’s conception of the changing-look quasar as it evolved from 2003 to 2015. The beginning of the animation shows gas falling into the central black hole, along with the first SDSS spectrum. The black hole then uses up all the surrounding gas, and it is shown with the spectrum recently obtained by the Time-Domain Spectroscopic Survey. The camera then pulls back to reveal the entire galaxy as the quasar shuts off, after which is looks like just another normal galaxy. The animation then fades into an artist’s conception of Hanny’s Voorwerp, a prior SDSS discovery that shows the record of a similar quasar shutting off. Credit: Dana Berry/SkyWorks Digital, Inc.

The change was so great that throughout the SDSS collaboration and astronomy community, the quasar became known as a "changing-look quasar." The black hole is still there, of course, but over the past 10 years, it appears to have swallowed all the gas in its vicinity. With the gas fallen into the black hole, the SDSS team were unable to detect the spectroscopic signature of the quasar.

"This is the first time we've seen a quasar shut off this dramatically, this quickly," said lead author Jessie Runnoe, a postdoctoral researcher at Pennsylvania State University.

Before Runnoe, Ruan and their colleagues could come to this conclusion, they had to rule out two other possibilities. A thick layer of dust could have passed through the host galaxy, obscuring their view of the black hole at its center. But, they concluded that there is no way that any dust cloud could have moved fast enough to cause a 50-fold drop in brightness in just two years. Another possibility is that the bright quasar in 2003 was just a temporary flare caused by the black hole ripping apart a nearby star. While this possibility has been invoked in similar cases, it cannot to explain the fact that the changing-look quasar had been shining for many years before it turned off.

The team's conclusion is that the quasar has used up all the glowing-hot in its immediate vicinity, leading to a rapid drop in brightness.

"Essentially, it has run out of food, at least for the moment," says Runnoe. "We were fortunate to catch it before and after."

The changing-look quasar is the first major discovery reported for the Time-Domain Spectroscopic Survey, one component of SDSS's fourth phase, which will continue for the next several years.

"We found this quasar because we went back to study thousands of quasars seen before," said Anderson. "This discovery was only possible because the SDSS is so deep and has continued so long."

Explore further: New type of black-hole quasar discovered

More information: mnras.oxfordjournals.org/content/455/2/1691.short

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Tuxford
1.8 / 5 (10) Jan 09, 2016
"This is the first time we've seen a quasar shut off this dramatically, this quickly,"


Just more mounting evidence for LaViolette's Continuous Creation model. He predicts that about 10-15% of large galaxies will have their supermassive cores in the active state (AGN). And that such a condition changes rapidly. It is all there in his model. You just have too look.

So with so many of his long-stated predictions now becoming confirmed in observations, why is the community so reluctant to consider the model??

Heresy: 1. opinion or doctrine at variance with the orthodox or accepted doctrine, especially of a church or religious system.
antialias_physorg
5 / 5 (8) Jan 09, 2016
So with so many of his long-stated predictions now becoming confirmed

Name one.

LaViolette makes a lot of predictions that are NOT observed.

Heresy: 1. opinion or doctrine at variance with the orthodox or accepted doctrine, especially of a church or religious system.

Idiocy: Clinging to a model that has been disproven and even disavowed by its co-creators.
Bigbangcon
2.2 / 5 (10) Jan 09, 2016
When the fantasies of GR, Big Bang, Dark/Black monsters of cosmology are finally discredited, the discoveries and the view of Halton (Chip) Arp and others about the Quasars will be vindicated. :https://en.wikipe...ton_Arp.
Arp is routinely dismissed by Big Science, but except for two geniuses of Chinese astrophysicists (quoted in the ref. above), Arp is yet to be proven wrong; even if the "Hoyle-Narlikar-Arp" "variable mass" theory does not seem to be credible now. Quasars always seem to be redshifted, because the emission from the quasars is confined to a backward cone; an observer therefore, only sees those quasars that are receding; the ram pressure from the intergalactic medium blocks the forward emission.
More to follow below:
Bigbangcon
1.9 / 5 (9) Jan 09, 2016
Quasars are chunks of nearby active galaxies expelled with enormous speed along the minor axis of the spiral galaxies powered by the large scale annihilation of matter with antimatter that chance-accumulate at the galactic core.
The quasars represent the first short-lived stage of the satellite galaxies that surround the large active galaxies. In time the quasars are slowed down due to the gravitational pull of the mother galaxy to form satellite galaxies with normal redshifts. In such a scenario, the very high redshifts of the quasars are intrinsic and caused by a combination of Doppler Effect due to the enormous recession velocity of the quasars, the gravitational and the large Jaakkola effect (viscosity drag) on the emitted light during the ejection phase.: http://www.amazon...40414445
my2cts
3.3 / 5 (7) Jan 09, 2016
Here is what the mainstream conspiracy against Halton (chip) Arp has to say on Steady State Models:
"the existence of a blackbody background ruled out the Steady State"
http://www.astro....stat.htm
Bigbangcon
2 / 5 (8) Jan 09, 2016

"the existence of a blackbody background ruled out the Steady State"
http://www.astro....stat.htm"

The Hoyle-Narlikar "Steady State Model and the Big Bang Model are both based on GR and causality and are not that much different philosophically.

Arp's idea of the quasars and their intrinsic redshift have been reinterpreted (with Arp's agreement and direct approval) by the Canadian scientist/philosopher - Dr. Malek; from a dialectical and a quantum dynamical point of view. The CMBR is now reinterpreted as the quantum dynamically mandated "zero-point energy" (like the "zero-point vibrational energy" of matter at Absolute Zero temperature), of an infinite and eternal (no beginning or end) universe. None of the above two models are necessary nor appropriate.

http://redshift.v...2MAL.pdf

http://redshift.v...MAL.pdf.
And some more recent publications by the same author, available as books and journal articles.

promile
Jan 10, 2016
This comment has been removed by a moderator.
my2cts
3.8 / 5 (10) Jan 10, 2016
the existence of a blackbody background ruled out the Steady State
On the contrary, the existence of CMBR noise is required for explanation of the red shift in Steady state Universe model. If the space-time would be completely flat, then the tired light model would remain undefendable/unexplainable.

The tired light model has been refuted.
https://en.wikipe...ed_light
TechnoCreed
4.3 / 5 (6) Jan 10, 2016
the existence of a blackbody background ruled out the Steady State
On the contrary, the existence of CMBR noise is required for explanation of the red shift in Steady state Universe model. If the space-time would be completely flat, then the tired light model would remain undefendable/unexplainable.

Well, here is another comment that falls flat! You see, the Universe is so very flat that the inflation theory is the only acceptable postulation that brings a sensible explanation to this observation. On this, here are two links that are going to help you; one from the University of Illinois the other from NASA. They are short, easy to read and hopefully, will help you establish a proper path toward a better understanding. http://archive.nc...lem.html , http://wmap.gsfc....nfl.html
my2cts
3.7 / 5 (6) Jan 10, 2016
promile
Jan 10, 2016
This comment has been removed by a moderator.
my2cts
3.4 / 5 (5) Jan 10, 2016
"Nope" falls a little short as argumentation.
Give some derivation involving QED please.
promile
Jan 10, 2016
This comment has been removed by a moderator.
my2cts
3.5 / 5 (8) Jan 10, 2016
Delbrueck scattering does not explain cosmological redshift.
promile
Jan 10, 2016
This comment has been removed by a moderator.
my2cts
3.9 / 5 (7) Jan 10, 2016
Why do you think so? Give some derivation involving QED please.

I have good reasons, worked on it 20 years ago at a Max Planck institute.
But why should I show anything? You make a claim so you back it up.
promile
Jan 10, 2016
This comment has been removed by a moderator.
cantdrive85
2.1 / 5 (7) Jan 10, 2016
the existence of a blackbody background ruled out the Steady State
On the contrary, the existence of CMBR noise is required for explanation of the red shift in Steady state Universe model. If the space-time would be completely flat, then the tired light model would remain undefendable/unexplainable.

Well, here is another comment that falls flat! You see, the Universe is so very flat that the inflation theory is the only acceptable postulation that brings a sensible explanation to this observation. On this, here are two links that are going to help you; one from the University of Illinois the other from NASA. They are short, easy to read and hopefully, will help you establish a proper path toward a better understanding. http://archive.nc...lem.html

Pseudoscientific metaphysical mumbo jumbo! All of it.
cantdrive85
2 / 5 (8) Jan 10, 2016
The plasma induces the redshift, shown in laboratory experiment. Almost assuredly to be ignored by the BB religious acolytes.

http://vixra.org/...10v1.pdf
cantdrive85
2.3 / 5 (6) Jan 10, 2016
Why do you think so? Give some derivation involving QED please.

I have good reasons, worked on it 20 years ago at a Max Planck institute.
But why should I show anything? You make a claim so you back it up.

As a janitor I'm sure, reading through the work that got thrown away.
promile
Jan 10, 2016
This comment has been removed by a moderator.
Uncle Ira
4 / 5 (4) Jan 10, 2016
@ Zephir-Skippy. How you are Cher if this you? We sure have missed while you were on the vacations. I better just speak for my self, I have missed you and don't really know what the other we's think.

I already provided links and sources, whereas you provided only some hand-waving (appeal to authority fallacy actually).


Are you trying to not sound like you while you are sounding like you? Are you here undercover?

the proponents of mainstream cosmology simply DON'T WANT to think about any other alternatives by itself - they're just waiting for others with development of alternative cosmology, which would provide some reliable job for them, after then.


That's sounds more like you. Where you go for your vacation? Is some place where they talk really different from what you are used to?

They're looking for generator of grants, not the inquisitive research.


Hooyeei, Cher that you are normal (for you) again.
Uncle Ira
4.2 / 5 (5) Jan 10, 2016
the Universe is so very flat that the inflation theory is the only acceptable postulation
First of all, the flatness of Universe doesn't imply the flatness of space-time at the CMBR scale. We can have flat Universe even with quite noisy space-time: its vacuum fluctuations will just average and compensate mutually at sufficiently large scale. And the Universe even isn't quite flat (we can observe CMBR Doppler anisotropy and http://arxiv.org/...1844.pdf inside the Planck data).


Maybe you should tell him about Lodge-Skippy and the AWT. I don't think he's ready for the electron-ducks in the foamy ripples yet.

Here is the easy one for you to use to get him ready for the complicated stuffs.

http://earthlingclub.com/
my2cts
3.3 / 5 (7) Jan 10, 2016
You also made a claim "Delbrueck scattering does not explain cosmological redshift". This is just a conjecture of yours, not mine one. I already provided links and sources, whereas you provided only some hand-waving (appeal to authority fallacy actually). The problem is, the proponents of mainstream cosmology simply DON'T WANT to think about any other alternatives by itself - they're just waiting for others with development of alternative cosmology, which would provide some reliable job for them, after then. They're looking for generator of grants, not the inquisitive research.

Sorry, but the science doesn't work so.

What do you know about science ?
You claim that Delbrueck scattering explains cosmological redshift.
So show it.
Your wiki link does not support it.
my2cts
3.5 / 5 (8) Jan 10, 2016
Why do you think so? Give some derivation involving QED please.

I have good reasons, worked on it 20 years ago at a Max Planck institute.
But why should I show anything? You make a claim so you back it up.

As a janitor I'm sure, reading through the work that got thrown away.

Yes you are sure, but that is because you are an idiot. You keep forgetting that.
my2cts
3.5 / 5 (8) Jan 10, 2016
Why anyone would makes such a claim and then refuses to back it up is beyond me.
Only a narcissist would do that. Wait, that's it!
"Narcissism is the pursuit of gratification from vanity or egotistic admiration of one's own attributes."
https://en.wikipe...rcissism
"extreme selfishness, with a grandiose view of one's own talents and a craving for admiration."
my2cts
3.5 / 5 (8) Jan 10, 2016
The plasma induces the redshift, shown in laboratory experiment. Almost assuredly to be ignored by the BB religious acolytes.

Plasma produces radiation that would be really really hard to miss.
Here is an example of plasma:
https://en.wikipe...bula.jpg
You are wrong as always. Your opinions originate from pathology.
RealityCheck
1 / 5 (4) Jan 10, 2016
Hi Forum. :)

In this brand new year, let's try to avoid playing the man instead of the ball, hey? Please stick to addressing/discussing the science/ideas objectively and courteously, without personal agendas/egos getting in the way like it did in years past.

Anyhow...

@my2cts: FYI re plasma signature: Please be aware that radiation from plasma has many frequencies, and any high energy radiation from within a cloud of weakly-ionized plasma in IG space does not come out as strong signal, but much-redshifted/black-body type (as has been already pointed out). So your assumption that plasmas cannot exist/behave as light-attenuating media (because they cannot be 'observed by a certain radiation type as you insist) is no longer tenable; as you ignore recent lab/observational evidence which indicates that MANY levels of ionization of IG plasma at MANY densities/flows/contracting/expanding states/distributions DO exist and are having a real effect on what we 'see' from 'here'. :)
my2cts
3.3 / 5 (7) Jan 10, 2016
@ RC
So RC, show, using physics, how the CMB can originate from interaction with plasma.
And,although it is sunday today, but no sermons please. These guys are psychiatric cases, don't give them false hope.
RealityCheck
1 / 5 (3) Jan 10, 2016
Hi my2cts. :)
So RC, show, using physics, how the CMB can originate from interaction with plasma.
I have already and often pointed to the known astrophysical/astronomical observations which have lately confirmed my longstanding observation that deep space and near space is a 'mixmaster' for any light signals of any wavelengths. BICEP/Plank have already proven this. Dust and molecular/atomic IG medium (and the plasMONIC 'surface effects' of every single particle) has an effect on light signals coming within their interactive vicinity...which is hard to avoid for any light wave going through expansive distributions of said IG media, however 'diffuse' you may think it is overall. So it's not only direct collisions, but also countless 'glancing' interactions with plasmonic surfaces/regions. There also huge range/spectrum of jet/shock procsses/distribution emissions.

PS: I'm atheist since age 9. I dont give 'sermons'. I make relevant objective/impartial observations. :)
Uncle Ira
4 / 5 (4) Jan 10, 2016
PS: I'm atheist since age 9. I dont give 'sermons'. I make relevant objective/impartial observations. :)


Maybe because you haven't seen one since you were 10 or 9 years old you forget what they sound like. But 2-penny-Skippy make an honest mistake. What you write really does sound just church sermons, a lot like that. So you do give sermons maybe by mistake even though you forget after so long what they sound like.
my2cts
3.9 / 5 (7) Jan 10, 2016
Hi my2cts. :)
So RC, show, using physics, how the CMB can originate from interaction with plasma.
I have already and often pointed to the known astrophysical/astronomical observations which have lately confirmed my longstanding observation that deep space and near space is a 'mixmaster' for any light signals of any wavelengths.

I don't see how any of these phenomena explain the CMB observations. Note that an alternative explanation requires us to be enveloped in a very uniform and perfect black body of T=2.725 and also should explain the primary anisotropy. That is a tall order but be my guest.
I make relevant objective/impartial observations. :)

Me too ;-). Some positions taken here can however only be explained by invoking psychology.
AGreatWhopper
1 / 5 (2) Jan 12, 2016
Tuxturds 1/5 (80145) Jan 09, 2016
So with so many of his long-stated predictions now becoming confirmed in observations, why is the community so reluctant to consider the model??

It's unnecessary, not supported by the data, at variance with accepted research and promoted by the thickest of trolls, as you so ably demonstrate.

"Essentially, it has run out of food, at least for the moment,"

and
"Quiet quasar has apparently eaten its fill"


Man, could you quit anthropomorphizing long enough to not completely contradict yourself???

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