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We present the results of a novel new search of the first data-release from the Sloan Digital Sky Survey (SDSS-DR1) for the spectra of supernovae. The use of large spectroscopic galaxy surveys offers the prospect of obtaining improved…

天体物理学 · 物理学 2009-11-10 Darren S. Madgwick , Paul Hewett , Daniel Mortlock , Lifan Wang

We analyze the magnitude-redshift data of type Ia supernovae included in the Union and Union2 compilations in the framework of an anisotropic Bianchi type I cosmological model and in the presence of a dark energy fluid with anisotropic…

宇宙学与河外天体物理 · 物理学 2011-05-12 L. Campanelli , P. Cea , G. L. Fogli , A. Marrone

We review some results of the past 12 years derived from optical and infrared photometry of Type Ia supernovae. A combination of optical and infrared photometry allows us to determine accurately the extinction along the line of sight. The…

宇宙学与河外天体物理 · 物理学 2012-06-01 Kevin Krisciunas

Type Ia Supernovae (SNe Ia) have become the most precise distance indicators in astrophysics due to their incredible observational homogeneity. Increasing discovery rates, however, have revealed multiple sub-populations with spectroscopic…

天体物理仪器与方法 · 物理学 2025-05-07 Yunyi Shen , Alexander T. Gagliano

SNe Ia have been used to provide key constraints on the equation-of-state parameter of dark energy. They are generally standardized under the assumption that they belong to a single population, with luminosities standardized in a continuous…

宇宙学与河外天体物理 · 物理学 2026-01-28 David Rubin , Taylor Hoyt , Greg Aldering , Saul Perlmutter

Type Ia supernovae (SNe Ia) constitute an historical probe to derive cosmological parameters through the fit of the Hubble-Lema\^itre diagram, i.e. SN Ia distance modulus versus their redshift. In the era of precision cosmology, realistic…

Type Ia supernovae (SNe Ia) have been intensively investigated due to its great homogeneity and high luminosity, which make it possible to use them as standardizable candles for the determination of cosmological parameters. In 2011, the…

宇宙学与河外天体物理 · 物理学 2016-11-04 Rodrigo C. V. Coelho , Maurício O. Calvão , Ribamar R. R. Reis , Beatriz B. Siffert

The Sloan Digital Sky Survey II (SDSS-II) Supernova Survey discovered Type Ia supernovae (SNe Ia) in an almost unexplored intermediate redshift range of $0.05 < z < 0.4$ and provided densely sampled multi-color light curves for SN…

We present detailed investigation of a specific $i$-band light-curve feature in Type Ia supernovae (SNe Ia) using the rapid cadence and high signal-to-noise ratio light-curves obtained by the Carnegie Supernova Project. The feature is…

We present volumetric rates and luminosity functions (LFs) of Type Ia supernovae (SNe Ia) from the All-Sky Automated Survey for Supernovae (ASAS-SN), covering the 11-year period from 2014 to 2024. By combining the 2014--2017 $V$-band sample…

The Sloan Digital Sky Survey-II Supernova Survey has identified a large number of new transient sources in a 300 sq. deg. region along the celestial equator during its first two seasons of a three-season campaign. Multi-band (ugriz) light…

We give an overview of the current understanding of Type Ia supernovae relevant for their use as cosmological distance indicators. We present the physical basis to understand their homogeneity of the observed light curves and spectra and…

天体物理学 · 物理学 2007-05-23 P. Hoeflich

We show empirically that fits to the color-magnitude relation of Type Ia supernovae after optical maximum can provide accurate relative extragalactic distances. We report the discovery of an empirical color relation for Type Ia light…

天体物理学 · 物理学 2009-11-07 Lifan Wang , Gerson Goldhaber , Greg Aldering , Saul Perlmutter

Late-time observations of Type Ia supernovae (SNe Ia), >900 days after explosion, have shown that this type of SN does not suffer an "IR catastrophe" at 500 days as previously predicted. Instead, several groups have observed a slow-down in…

高能天体物理现象 · 物理学 2018-10-17 Or Graur , David R. Zurek , Mihai Cara , Armin Rest , Ivo R. Seitenzahl , Benjamin J. Shappee , Michael M. Shara , Adam G. Riess

In this paper, we present a scheme to investigate the opacity of the Universe in a cosmological-model-independent way, with the combination of current and future measurements of type Ia supernova sample and galactic-scale strong…

宇宙学与河外天体物理 · 物理学 2020-01-08 Yu-Bo Ma , Shuo Cao , Jia Zhang , Jingzhao Qi , Tonghua Liu , Yuting Liu , Shuaibo Geng

We summarize the current status of cosmological measurements using SNe Ia. Searches to an average depth of z~0.5 have found approximately 100 SNe Ia to date, and measurements of their light curves and peak magnitudes find these objects to…

天体物理学 · 物理学 2009-09-25 Robert A. Schommer , N. B. Suntzeff , R. C. Smith

In this third paper in a series we compare spectral feature measurements to photometric properties of 108 low-redshift (z < 0.1) Type Ia supernovae (SNe Ia) with optical spectra within 5 d of maximum brightness. We find the…

宇宙学与河外天体物理 · 物理学 2015-06-04 Jeffrey M. Silverman , Mohan Ganeshalingam , Weidong Li , Alexei V. Filippenko