The influence of environmental effects on Type Ia Supernovae Standardization

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Baluta, Anastasia, Pruzhinskaya, Maria, Rosnet, Philippe, Pauna, Nicoleta
Formato:	Preprint
Publicado:	2024
Materias:	High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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author	Baluta, Anastasia Pruzhinskaya, Maria Rosnet, Philippe Pauna, Nicoleta
author_facet	Baluta, Anastasia Pruzhinskaya, Maria Rosnet, Philippe Pauna, Nicoleta
contents	Type Ia Supernovae (SNe Ia) are used as reliable cosmic distance indicators and their standardization is necessary for a more accurate measurement of the cosmological parameters of the Universe. However, the Hubble diagram still shows some intrinsic dispersion, potentially influenced by the supernova's environment. In this study, we reproduce the Hubble diagram fit for the Pantheon supernova sample, and also investigate the possibility of introducing various standardization equations for supernovae exploded in early- and late-type galaxies. We analyze 330 Pantheon SNe Ia to study how host galaxy morphology affects their standardization. We find that SNe Ia hosted by early-type galaxies have different standardization parameters compared to those hosted by late-type galaxies. We conclude that correcting supernova luminosity for host galaxy morphology is essential to perform the precise cosmological analysis.
format	Preprint
id	arxiv_https___arxiv_org_abs_2406_09512
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	The influence of environmental effects on Type Ia Supernovae Standardization Baluta, Anastasia Pruzhinskaya, Maria Rosnet, Philippe Pauna, Nicoleta High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Type Ia Supernovae (SNe Ia) are used as reliable cosmic distance indicators and their standardization is necessary for a more accurate measurement of the cosmological parameters of the Universe. However, the Hubble diagram still shows some intrinsic dispersion, potentially influenced by the supernova's environment. In this study, we reproduce the Hubble diagram fit for the Pantheon supernova sample, and also investigate the possibility of introducing various standardization equations for supernovae exploded in early- and late-type galaxies. We analyze 330 Pantheon SNe Ia to study how host galaxy morphology affects their standardization. We find that SNe Ia hosted by early-type galaxies have different standardization parameters compared to those hosted by late-type galaxies. We conclude that correcting supernova luminosity for host galaxy morphology is essential to perform the precise cosmological analysis.
title	The influence of environmental effects on Type Ia Supernovae Standardization
topic	High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2406.09512

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