Tests of the accelerating universe with near-infrared observations of a high-redshift type Ia supernova
Date
2000
Authors
Riess, Adam
Filippenko, Alexei V
Liu, Michael C
Challis, Peter M
Clocchiatti, Alejandro
Diercks, Alan
Garnavich, Peter M
Hogan, Craig
Jha, Saurabh
Kirshner, Robert P
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Physics Publishing Ltd.
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 the Hubble Space T elescope (HST ) and ground-based near-infrared detectors. A goal of this study is the measurement of the color excess, a sensitive indicator ofEB~I,
interstellar or intergalactic dust, which could a†ect 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 p conÐdence level) and grayer dust (grain size [ 0.1 km, rejected at the 2.3È2.6 p conÐdence level) as proposed by Aguirre. The rest-frame I-band light curve shows the secondary maximum 1 month after the B maximum typical of nearby SNe Ia of normal luminosity, providing no indication of evolution as a func-
tion of redshift out to z B 0.5. An expanded set of similar observations could improve the constraints on any contribution of extragalactic dust to the dimming of high-redshift SNe Ia.
Description
Keywords
Cosmology, observations, Distance scale, Supernovae, general
Citation
Collections
Source
Astrophysical Journal Letters
Type
Journal article
Book Title
Entity type
Access Statement
Open Access
License Rights
DOI
Restricted until
Downloads
File
Description