* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Home -> Astronomy News -> Supernovae -> Supernova UDS10Wil
Post Info TOPIC: Supernova UDS10Wil
Blobrana


L

Posts: 131433
Date:
RE: Supernova UDS10Wil
Permalink  
 

Hubble Breaks Record in Search for Farthest Supernova

NASA's Hubble Space Telescope has found the farthest supernova so far of the type used to measure cosmic distances. Supernova UDS10Wil, nicknamed SN Wilson after American President Woodrow Wilson, exploded more than 10 billion years ago.
SN Wilson belongs to a special class called Type Ia supernovae. These bright beacons are prized by astronomers because they provide a consistent level of brightness that can be used to measure the expansion of space. They also yield clues to the nature of dark energy, the mysterious force accelerating the rate of expansion. 
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Title: The Discovery of the Most Distant Known Type Ia Supernova at Redshift 1.914
Authors: David O. Jones, Steven A. Rodney, Adam G. Riess, Bahram Mobasher, Tomas Dahlen, Curtis McCully, Teddy F. Frederiksen, Stefano Casertano, Jens Hjorth, Charles R. Keeton, Anton Koekemoer, Louis-Gregory Strolger, Tommy G. Wiklind, Peter Challis, Or Graur, Brian Hayden, Brandon Patel, Benjamin J. Weiner, Alexei V. Filippenko, Peter Garnavich, Saurabh W. Jha, Robert P. Kirshner, Henry C. Ferguson, Norman A. Grogin, Dale Kocevski

We present the discovery of a Type Ia supernova (SN) at redshift z = 1.914 from the CANDELS multi-cycle treasury program on the Hubble Space Telescope (HST). This SN was discovered in the infrared using the Wide-Field Camera 3, and it is the highest-redshift Type Ia SN yet observed. We classify this object as a SN Ia by comparing its light curve and spectrum with those of a large sample of Type Ia and core-collapse supernovae (SNe). Its apparent magnitude is consistent with that expected from the \Lambda CDM concordance cosmology. We discuss the use of spectral evidence for classification of z > 1.5 SNe Ia using HST grism simulations, finding that spectral data alone can frequently rule out SNe II, but distinguishing between SNe Ia and SNe Ib/c can require prohibitively long exposures. In such cases, a quantitative analysis of the light curve may be necessary for classification. Our photometric and spectroscopic classification methods can aid the determination of SN rates and cosmological parameters from the full high-redshift CANDELS SN sample.

Read more (1813kb, PDF)



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Home -> Astronomy News -> Supernovae -> Supernova UDS10Wil


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard