Young boy's discovery confirmed as a peculiar supernova explosion

Dec 11, 2013 by Dan Majaess, Universe Today
Observations confirming that young Nathan Gray’s cosmic discovery is a supernova were obtained from the Asiago 1.82-m Copernico Telescope Credit: L.C. / Istituto Nazionale di Astrofisica

New observations confirm that young Nathan Gray's discovery is indeed a supernova explosion, albeit a rather peculiar one. Nathan Gray, age 10, discovered a new cosmic source on October 30th that emerged in the constellation of Draco, and it was subsequently classified as a supernova candidate. Evidence available at the time was sufficiently convincing that Nathan was promptly heralded as the youngest individual to discover a supernova.

The discovery garnered world-wide attention, however, confirmation via a spectrum from a large telescope was necessary to unambiguously identify the target as a supernova. In addition, that observation would enable astronomers to determine the supernova class and identify the progenitor of the exploding star. In other words, was the star initially comparable in mass to the Sun and a member of a binary system, or was the original star significantly more massive and a neutron star is potentially all that remains?

The new observations were acquired by Lina Tomasella and Leonardo Tartaglia of the Padova-Asiago Supernova Group, and imply that the supernova stems from a star significantly more massive than the Sun. Andrea Pastorello, a member of that group, noted that the target's spectrum displays the presence of hydrogen (specifically H-alpha emission), which rules out the scenario of a lower-mass progenitor in a binary system (those are classified as type Ia).

Features present in the observations led the astronomers to issue a preliminary supernova classification of type II-pec (peculiar). The blue spectral continuum is typical of a type IIn supernova, but the expansion velocity inferred from the hydrogen line (3100 km/s) is an order of magnitude larger than expected, which motivated the team to issue the aforementioned classification. Pastorello further noted that the target is somewhat similar to SN 1998s, and in general type II supernovae exhibit heterogeneous observational properties.

An artist’s sketch of a supernova explosion. Credit: Adam Burn / deviantART

Nathan had been scanning astronomical images sent by David J. Lane (Saint Mary's University) for months, and identified some potential sources that proved to be false detections or previous discoveries. However, the Padova-Asiago Supernova Group has now confirmed that isn't the case this time. Indeed, the discovery means that Nathan officially unseats his sister Kathryn as the youngest person to discover a supernova, yet she is elated for her bother (see Nancy Atkinson's article regarding Kathryn's discovery).

Nathan, his sister, and parents Paul and Susan, formed a search team in partnership with Lane. The original discovery images were obtained from the Abbey Ridge Observatory, which is stationed in Lane's backyard.

Those desiring additional information on supernovae will find the video below pertinent.

This video is not supported by your browser at this time.


Explore further: 'Eye of Sauron': Using supermassive black holes to measure cosmic distances

add to favorites email to friend print save as pdf

Related Stories

Astronomers discover new kind of supernova

Mar 26, 2013

(Phys.org) —Supernovae were always thought to occur in two main varieties. But a team of astronomers including Carnegie's Wendy Freedman, Mark Phillips and Eric Persson is reporting the discovery of a new ...

Mach 1000 shock wave lights supernova remnant

Nov 25, 2013

When a star explodes as a supernova, it shines brightly for a few weeks or months before fading away. Yet the material blasted outward from the explosion still glows hundreds or thousands of years later, ...

Pan-STARRS finds a 'lost' supernova

Mar 07, 2013

(Phys.org) —The star Eta Carinae is ready to blow. 170 years ago, this 100-solar-mass object belched out several suns' worth of gas in an eruption that made it the second-brightest star after Sirius. That ...

10-year-old girl discovers a supernova

Jan 04, 2011

A ten-year old girl from Canada has discovered a supernova, making her the youngest person ever to find a stellar explosion. The Royal Astronomical Society of Canada announced the discovery by Kathryn Aurora ...

Hubble catches stellar explosions in NGC 6984

Nov 08, 2013

Supernovae are intensely bright objects. They are formed when a star reaches the end of its life with a dramatic explosion, expelling most of its material out into space.

Recommended for you

A colorful gathering of middle-aged stars

Nov 26, 2014

NGC 3532 is a bright open cluster located some 1300 light-years away in the constellation of Carina(The Keel of the ship Argo). It is informally known as the Wishing Well Cluster, as it resembles scattered ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.