Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program

Shifting the focus of Type Ia supernova (SN Ia) cosmology to the near-infrared (NIR) is a promising way to significantly reduce the systematic errors, as the strategy minimizes our reliance on the empirical width-luminosity relation and uncertain dust laws. Observations in the NIR are also crucial f...

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Autor principal: Folatelli, Gastón
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Astronómicas
Stars: supernovae: general
Cosmology: dark energy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125512
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125512
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Stars: supernovae: general
Cosmology: dark energy
spellingShingle Ciencias Astronómicas
Stars: supernovae: general
Cosmology: dark energy
Folatelli, Gastón
Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
topic_facet Ciencias Astronómicas
Stars: supernovae: general
Cosmology: dark energy
description Shifting the focus of Type Ia supernova (SN Ia) cosmology to the near-infrared (NIR) is a promising way to significantly reduce the systematic errors, as the strategy minimizes our reliance on the empirical width-luminosity relation and uncertain dust laws. Observations in the NIR are also crucial for our understanding of the origins and evolution of these events, further improving their cosmological utility. Any future experiments in the rest-frame NIR will require knowledge of the SN Ia NIR spectroscopic diversity, which is currently based on a small sample of observed spectra. Along with the accompanying paper, Phillips et al. (2018), we introduce the Carnegie Supernova Project-II (CSP-II), to follow up nearby SNe Ia in both the optical and the NIR. In particular, this paper focuses on the CSP-II NIR spectroscopy program, describing the survey strategy, instrumental setups, data reduction, sample characteristics, and future analyses on the data set. In collaboration with the Harvard-Smithsonian Center for Astrophysics (CfA) Supernova Group, we obtained 661 NIR spectra of 157 SNe Ia. Within this sample, 451 NIR spectra of 90 SNe Ia have corresponding CSP-II follow-up light curves. Such a sample will allow detailed studies of the NIR spectroscopic properties of SNe Ia, providing a different perspective on the properties of the unburned material, radioactive and stable nickel produced, progenitor magnetic fields, and searches for possible signatures of companion stars.
format Articulo
Articulo
author Folatelli, Gastón
author_facet Folatelli, Gastón
author_sort Folatelli, Gastón
title Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
title_short Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
title_full Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
title_fullStr Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
title_full_unstemmed Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
title_sort carnegie supernova project-ii: the near-infrared spectroscopy program
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/125512
work_keys_str_mv AT folatelligaston carnegiesupernovaprojectiithenearinfraredspectroscopyprogram
bdutipo_str Repositorios
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