학술논문
A Sample of Dust Attenuation Laws for DES Supernova Host Galaxies
Document Type
Working Paper
Author
Duarte, J.; González-Gaitán, S.; Mourao, A.; Paulino-Afonso, A.; Guilherme-Garcia, P.; Aguas, J.; Galbany, L.; Kelsey, L.; Scolnic, D.; Sullivan, M.; Brout, D.; Palmese, A.; Wiseman, P.; Pieres, A.; Malagón, A. A. Plazas; Rosell, A. Carnero; To, C.; Gruen, D.; Bacon, D.; Brooks, D.; Burke, D. L.; Gerdes, D. W.; James, D. J.; Hollowood, D. L.; Friedel, D.; Bertin, E.; Suchyta, E.; Sanchez, E.; Paz-Chinchón, F.; Gutierrez, G.; Tarle, G.; Diehl, H. T.; Sevilla-Noarbe, I.; Ferrero, I.; Carretero, J.; Frieman, J.; De Vicente, J.; García-Bellido, J.; Honscheid, K.; Kuehn, K.; Gatti, M.; Raveri, M.; Pereira, M. E. S.; Rodriguez-Monroy, M.; Smith, M.; Kind, M. Carrasco; Costanzi, M.; Aguena, M.; Kuropatkin, N.; Weaverdyck, N.; Alves, O.; Doel, P.; Melchior, P.; Miquel, R.; Gruendl, R. A.; Hinton, S. R.; Bocquet, S.; Desai, S.; Everett, S.; Davis, T. M.; Scarpine, V.
Source
A&A 680, A56 (2023)
Subject
Language
Abstract
Type Ia supernovae (SNe Ia) are useful distance indicators in cosmology, provided their luminosity is standardized by applying empirical corrections based on light-curve properties. One factor behind these corrections is dust extinction, accounted for in the color-luminosity relation of the standardization. This relation is usually assumed to be universal, which could potentially introduce systematics into the standardization. The ``mass-step'' observed for SNe Ia Hubble residuals has been suggested as one such systematic. We seek to obtain a completer view of dust attenuation properties for a sample of 162 SN Ia host galaxies and to probe their link to the ``mass-step''. We infer attenuation laws towards hosts from both global and local (4 kpc) Dark Energy Survey photometry and Composite Stellar Population model fits. We recover a optical depth/attenuation slope relation, best explained by differing star/dust geometry for different galaxy orientations, which is significantly different from the optical depth/extinction slope relation observed directly for SNe. We obtain a large variation of attenuation slopes and confirm these change with host properties, like stellar mass and age, meaning a universal SN Ia correction should ideally not be assumed. Analyzing the cosmological standardization, we find evidence for a ``mass-step'' and a two dimensional ``dust-step'', both more pronounced for red SNe. Although comparable, the two steps are found no to be completely analogous. We conclude that host galaxy dust data cannot fully account for the ``mass-step'', using either an alternative SN standardization with extinction proxied by host attenuation or a ``dust-step'' approach.
Comment: 20 pages, 10 figues, 9 tables. Supplementary material included (10 pages). Accepted for publication on A&A
Comment: 20 pages, 10 figues, 9 tables. Supplementary material included (10 pages). Accepted for publication on A&A