Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'504'928
Articles rated: 2609

25 April 2024

» arxiv » astro-ph/0001384

Article overview

Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova
Adam G. Riess ; Alexei V. Filippenko ; Michael C. Liu ; Peter Challis ; Alejandro Clocchiatti ; Alan Diercks ; Peter M. Garnavich ; Craig J. Hogan ; Saurabh Jha ; Robert P. Kirshner ; B. Leibundgut ; M. M. Phillips ; David Reiss ; Brian P. Schmidt ; Robert A. Schommer ; R. Chris Smith ; J. Spyromilio ; Christopher Stubbs ; Nicholas B. Suntzeff ; John Tonry ; Patrick Woudt ; Robert J. Brunner ; Arjun Dey ; Roy Gal ; James Graham ; James Larkin ; Steve C. Odewah n ; Ben Oppenheimer ;
Date:	21 Dec 1999
Journal:	Astrophys.J. 536 (2000) 62
Subject:	astro-ph
Abstract:	We have measured the rest-frame B,V, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z=0.46), using HST and ground-based near-infrared detectors. A goal of this study is the measurement of the color excess, E_{B-I}, which is a sensitive indicator of interstellar or intergalactic dust which could affect recent cosmological measurements from high-redshift SNe Ia. Our observations disfavor a 30% opacity of SN Ia visual light by dust as an alternative to an accelerating Universe. This statement applies to both Galactic-type dust (rejected at the 3.4 sigma confidence level) and greyer dust (grain size > 0.1 microns; rejected at the 2.3 to 2.6 sigma confidence level) as proposed by Aguirre (1999). The rest-frame $I$-band light cur ve shows the secondary maximum a month after B maximum typical of nearby SNe Ia of normal luminosi ty, providing no indication of evolution as a function of redshift out to z~0.5. A n expanded set of similar observations could improve the constraints on any contribution of extragalactic dust to the dimming of high-redshift SNe Ia.
Source:	arXiv, astro-ph/0001384
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap