Double engine for a nebula

Aug 05, 2009
This image, centerd on the B[e] star HD 87643, beautifully shows the extended nebula of gas and dust that reflects the light from the star. The central star's wind appears to have shaped the nebula, leaving bright, ragged tendrils of gas and dust. A careful investigation of these features seems to indicate that there are regular ejections of matter from the star every 15 to 50 years. The image, taken with the Wide Field Imager on the MPG/ESO 2.2m telescope at La Silla, is based on data obtained through different filters: B, V and R. Credit: ESO/F. Millour et al.

(PhysOrg.com) -- The new image, showing a very rich field of stars towards the Carina arm of the Milky Way, is centred on the star HD 87643, a member of the exotic class of B[e] stars [1]. It is part of a set of observations that provide astronomers with the best ever picture of a B[e] star.

The image was obtained with the Wide Field Imager (WFI) attached to the MPG/ESO 2.2-metre telescope at the 2400-metre-high La Silla Observatory in Chile. The image shows beautifully the extended of gas and dust that reflects the light from the star. The central star's wind appears to have shaped the nebula, leaving bright, ragged tendrils of gas and dust. A careful investigation of these features seems to indicate that there are regular ejections of matter from the star every 15 to 50 years.

A team of astronomers, led by Florentin Millour, has studied the star HD 87643 in great detail, using several of ESO's telescopes. Apart from the WFI, the team also used ESO's Very Large Telescope (VLT) at Paranal.

At the VLT, the astronomers used the NACO adaptive optics instrument, allowing them to obtain an image of the star free from the blurring effect of the atmosphere. To probe the object further, the team then obtained an image with the Very Large (VLTI).

The sheer range of this set of observations, from the panoramic WFI image to the fine detail of the VLTI observations, corresponds to a zoom-in factor of 60 000 between the two extremes. The astronomers found that HD 87643 has a companion located at about 50 times the Earth-Sun distance and is embedded in a compact dust shell. The two probably orbit each other in a period between 20 and 50 years. A dusty disc may also be surrounding the two stars.

The presence of the companion could be an explanation for the regular ejection of matter from the star and the formation of the nebula: as the companion moves on a highly elliptical orbit, it would regularly come very close to HD 87643, triggering an ejection.

Note:
[1]: B[e] stars are stars of spectral type B, with emission lines in their spectra, hence the "e". They are surrounded by a large amount of dust.

More information: The work on HD 87643 has been published in a paper to appear in Astronomy and Astrophysics: A binary engine fueling HD 87643's complex circumstellar environment using AMBER/VLTI imaging, by F. Millour et al.

Source: ESO (news : web)

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User comments : 8

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omatumr
1 / 5 (5) Aug 05, 2009
NEUTRON REPULSION IS THE ENGINE

See: "On the cosmic nuclear cycle and the similarity of nuclei and stars", Journal of Fusion Energy 25 (2006) 107-114;
DOI:10.1007/s10894-006-9009-6
http://xxx.lanl.g.../0511051
or http://tinyurl.com/2hzg2b

With kind regards,
Oliver K. Manuel
Ethelred
3.7 / 5 (3) Aug 05, 2009
So do you have any evidence for neutron emission yet Oliver?

Posting you usual stuff is not an answer. Actual testing that shows emissions and preferably from someone other than you.

Of course you haven't posted anything even from yourself that shows evidence of the emissions from iron that you need so I guess it will HAVE to be from someone else.

Ethelred
omatumr
1 / 5 (4) Aug 05, 2009
CAN ETHEL READ?

"EARTH'S HEAT SOURCE - THE SUN", Energy and Environment: SPECIAL ISSUE: Natural drivers of weather and climate,
volume 20, numbers 1 & 2, pp. 131-144 (2009)

http://arxiv.org/pdf/0905.0704

http://tinyurl.com/kje8yx

[And references therein.]

With kind regards,
Oliver K. Manuel
http://www.omatumr.com



Ethelred
4.5 / 5 (2) Aug 06, 2009
CAN ETHEL READ?


Certainly. I can also see that you use YOU as your primary source. That and students of yours.

I asked for EVIDENCE not more of your speculation.

You know the kind of thing actual working scientists do in labs or with accelerators or even that big pile of iron in India that you have ignored.

The question is not whether I can read but whether YOU CAN since you seem to not see all the questions I ask and the criticisms of the papers you claim I haven't read.

Until you show an actual measurable evidence of neutrons behaving the way you claim there is no evidence to support you. You evasions on this have become exceedingly evident. Your responses, when you actually respond which is rare, have always been to repost the articles that are being questioned. This rather a lot like a Creationist insisting that he is right because he got it from the Bible and he knows the Bible is true because its gods word and he knows its gods word because he got it from the Bible.

Quit playing circular games and give evidence or admit that you are spitwadding. It is truly amazing the way you write things in those articles. My favorite:

Two measurements [24, 25] independently confirmed that the Sun selectively moves



Now for 24 and then 25 heck I haven't looked yet and know the answer:

24) Manuel, O.K. and Hwaung, Golden, %u201CSolar abundance of the elements,%u201D Meteoritics, 1983, 18, 209-222.

25) Manuel, O., Pleess, M., Singh, Y. and Myers, W.A., %u201CNuclear systematics: Part IV. Neutron- capture cross sections and solar abundance%u201D, J. Radioanalytical and Nuclear Chemistry, 2005, 266 (2), 159-163. http://www.omatum...Fk01.pdf


Such independence. Both from Oliver. I think I pointed this one out the other day. You failed to respond. As per your usual.

Where is that evidence you claim? If it is there why do you adamantly refuse to point out just where exactly in the article you show that someone, anyone, has done a study showing the neutrons that are NOT FREE just plain spontaneously decay. We know they decay when free and the half life is so short that if that was the source of the Sun's energy all the neutrons would have decayed in a few days or weeks at most. There is no evidence that neutrons in atoms or in a neutron star actually decay. You simply claim that they do.

Where is the evidence? What paper? Who did it? You clearly have not done the experiments so it has to come from someone else. Someone in particle physics would be good. Something at all would be a massive break from your stonewalling.

And quit pretending that I haven't read your papers. I have. Every bloody one you posted. There is nothing in them that answers my questions. There are those bad joke like the one above where you claim to be independent of yourself.

Now since you claim I missed it POST THE PART I missed. Its not that hard. Well its not that hard if it exists and I sure haven't seen it despite reading them all. And quoting from them as well.

Ethelred
omatumr
1 / 5 (4) Aug 06, 2009
HELP FOR ETHEL

Perhaps the following discussion will help, but I doubt it.

http://www.physor...290.html

With kind regards,
Oliver K. Manuel
http://www.omatumr.com
Ethelred
5 / 5 (2) Aug 06, 2009
Answering my questions on pretty much any thread will help. Continued stonewalling seems to be your only response.

You are right to doubt it. It has nothing that supports you. As usual.

As expected you use anything at all to evade the questions and not just my questions, everyone's questions. As can be seen on the Naked Scientist forum you also link to.

Page 7: http://tinyurl.com/mrpgbg

Page 8: http://tinyurl.com/mlqhuy

Page 9: http://tinyurl.com/lkj7zw

Just answer the questions. Quit evading.

Ethelred
omatumr
1 / 5 (4) Aug 08, 2009
WILL ETHEL READ . . .

The historical information on pulsar planets posted here?

http://www.physor...063.html

You will be riding on one while you read !

Best wishes,
Oliver K. Manuel
http://www.omatumr.com
Ethelred
5 / 5 (2) Aug 09, 2009
WILL ETHEL READ . .


This the same exact answer I gave Oliver on:
http://www.physor...290.html

Because he gave the usual ad homonym attack and the same link so there is not need for different reply. I just want to make sure Oliver sees this and understands that I am tired of the personal attacks that he pretends are answers to valid questions.

-------------------------------
That is because you doubt that you can answer the questions. So instead you engage in ad homonym attacks, evasions and even lies.

Just answer the questions. Persenol attacks are NOT science. AND YOU are hardly the person to attack ANYONE for personal defects. Keep it up and I take the gloves off, yes they have been on. I have tried to keep this attempt at a discussion to reason and evidence and it is YOU that have attacked me and others for having the temerity to question your apparently godlike all knowing ways.

If you can't answer show some guts and say so. Personal attacks are nothing but intellectual cowardice. Posts that supported by YOUR questionable ideas cannot support your own questionable ideas.

And the one the two that aren't yours is old.

1. Peter Toth, "Is the Sun a pulsar?", Nature 270 (1977) 159-160.


The answer is no. Its been 32 years and that is all there is. One bit of speculation by one man who didn't follow up. Such evidence. Typical of your evidence by the way.

4. A. Wolszczan, %u201CConfirmation of earth-mass planets orbiting the millisecond pulsar PSR B 1257 12%u201D, Science 264 (1994) 538-542.


And this one that does nothing to support you at all. Planets around a pulsar simply show that a planet can sometimes survive a supernova. As a bare rock most likely.

That is a pretty inept effort at support. As per your usual. Sneer about the person asking questions if they don't toady and then post a link to more highly questionable claims of yours.

WHERE is the evidence that NON free neutrons fission as YOU claim they do. Claiming is not enough you yourself claim we need to go on the evidence. You don't have it.

Go on. Admit you don't evidence. Its not that hard and your attacks and evasions just make look unwilling to engage in a real effort to think things out. You just make things worse this way.

I am not kidding about the personal attacks. It has gone on way to long from you. You will not like the results if you do it again.

Ethelred