PDA

View Full Version : VLT Catches Supernova Between Galaxies



Blob
2006-Jun-29, 05:53 PM
ESO's VLT has obtained a unique image of a pair of entangled galaxies, in which a star exploded.

Because of the importance of exploding stars, and particularly of supernovae of Type Ia, for cosmological studies (e.g. relating to claims of an accelerated cosmic expansion and the existence of a new, unknown, constituent of the universe - the so called 'Dark Energy'), they are a preferred target of study for astronomers. Thus, on several occasions, they pointed ESO's Very Large Telescope (VLT) towards a region of the sky that portrays a trio of amazing galaxies.

http://static.flickr.com/63/177814605_a784980403_m.jpg (http://www.bautforum.com/attachment.php?attachmentid=2949&d=1151603728)
IMAGE (http://www.eso.org/outreach/press-rel/pr-2006/images/SN2005cf-annotated.jpg) (691kb, 800 x 1183)
This composite image based on data acquired with the FORS1 multi-mode instrument in April and May 2006 for the European Supernova Collaboration. The observations were made in four different filters (B, V, R, and I) that were combined to make a colour image. The field of view covers 5.6 x 8.3 arcmin. North is up and East is to the left. The observations were done by Ferdinando Patat and the Paranal Science team (ESO), and the final processing was done by Olivia Blanchemain, Henri Boffin and Haennes Heyer (ESO).

MCG-01-39-003 (bottom right) is a peculiar spiral galaxy, with a telephone number name, that presents a hook at one side, most probably due to the interaction with its neighbour, the spiral galaxy NGC 5917 (upper right). In fact, further enhancement of the image reveals that matter is pulled off MCG-01-39-003 by NGC 5917. Both these galaxies are located at similar distances, about 87 million light-years away, towards the constellation of Libra (The Balance).
NGC 5917 (also known as Arp 254 and MCG-01-39-002) is about 750 times fainter than can be seen by the unaided eye and is about 40,000 light-years across. It was discovered in 1835 by William Herschel, who strangely enough, seems to have missed its hooked companion, only 2.5 times fainter.
As seen at the bottom left of this exceptional VLT image, a still fainter and nameless, but intricately beautiful, barred spiral galaxy looks from a distance the entangled pair, while many 'island universes' perform a cosmic dance in the background.

The magnitude 15.5 type Ia Supernova 2005cf, was discovered on 2005/05/28.36 by the Lick Observatory Supernova Search, in the galaxy MCG -1-39-3 , located 15".7 west and 123" north of the centre.
Position(2000): R.A. = 15h21m32s.21, Dec. = -07°24'47".5

See more (http://www.eso.org/outreach/press-rel/pr-2006/phot-22-06.html)

publiusr
2006-Jun-29, 09:54 PM
I love the graphic.

mickal555
2006-Jul-13, 06:48 AM
Astronomers using ESO's Very Large Telescope have obtained a unique image of a pair of entangled galaxies that includes a supernova well outside the main body of one of the companions.

http://www.spacedaily.com/reports/VLT_Catches_Supernova_Between_Galaxies_999.html

Blob
2006-Jul-13, 11:30 AM
See also http://www.bautforum.com/showthread.php?t=43592

BigDon
2006-Jul-13, 11:42 AM
Mikal555 that link tried to do malware type stuff that my firewall caught. Not your fault but others should be careful.

mickal555
2006-Jul-13, 01:56 PM
!

Really??

What happened?

I'm kinda worried now, are you sure it's the link?

loglo
2006-Jul-13, 02:05 PM
Think it is just their advertising popups, they do something to get around browsers popup blockers. Came through the IDS/IPS/virus/malware stuff at work without a hitch though.

snabald
2006-Jul-13, 03:26 PM
I love the graphic.
Invert the colors and it's even cooler!

Blob
2006-Jul-13, 03:44 PM
Hum,
it is really a subjective view.
Using false colour or negative views can bring out detail that is difficult to see.

In this case the image was inverted, the individual RGB colours were adjusted and contrast increased to bring out that `hook`.

snabald
2006-Jul-13, 08:01 PM
Hum,
it is really a subjective view.
Using false colour or negative views can bring out detail that is difficult to see.

In this case the image was inverted, the individual RGB colours were adjusted and contrast increased to bring out that `hook`.

Yeah, I understand why it's negative, but the "non negative" version is simply beautiful.

Blob
2006-Jul-13, 08:09 PM
Hum,
yes, indeed it is.

Dragon Star
2006-Jul-13, 09:09 PM
Yeah, I understand why it's negative, but the "non negative" version is simply beautiful.

I totally agree. Wonderful image.

BigDon
2006-Jul-14, 12:56 AM
Could have been the popup Ads triggering false alarms. Thought it was an "About Blank" attack. You don't see those much anymore though. Sorry.

ToSeek
2006-Jul-14, 10:41 PM
Threads merged.