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The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust

Publication ,  Journal Article
Meldorf, C; Palmese, A; Brout, D; Chen, R; Scolnic, D; Kelsey, L; Galbany, L; Hartley, WG; Davis, TM; Drlica-Wagner, A; Vincenzi, M; Annis, J ...
Published in: Monthly Notices of the Royal Astronomical Society
January 1, 2023

Cosmological analyses with type Ia supernovae (SNe Ia) often assume a single empirical relation between colour and luminosity (β) and do not account for varying host-galaxy dust properties. However, from studies of dust in large samples of galaxies, it is known that dust attenuation can vary significantly. Here, we take advantage of state-of-the-art modelling of galaxy properties to characterize dust parameters (dust attenuation AV, and a parameter describing the dust law slope RV) for 1100 Dark Energy Survey (DES) SN host galaxies. Utilizing optical and infrared data of the hosts alone, we find three key aspects of host dust that impact SN cosmology: (1) there exists a large range (∼1-6) of host RV; (2) high-stellar mass hosts have RV on average ∼0.7 lower than that of low-mass hosts; (3) for a subsample of 81 spectroscopically classified SNe there is a significant (>3σ) correlation between the Hubble diagram residuals of red SNe Ia and the host RV that when corrected for reduces scatter by ∼ 13 per cent and the significance of the 'mass step' to ∼1σ. These represent independent confirmations of recent predictions based on dust that attempted to explain the puzzling 'mass step' and intrinsic scatter (σint) in SN Ia analyses.

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Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

January 1, 2023

Volume

518

Issue

2

Start / End Page

1985 / 2004

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0201 Astronomical and Space Sciences
 

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Meldorf, C., Palmese, A., Brout, D., Chen, R., Scolnic, D., Kelsey, L., … Varga, T. N. (2023). The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust. Monthly Notices of the Royal Astronomical Society, 518(2), 1985–2004. https://doi.org/10.1093/mnras/stac3056
Meldorf, C., A. Palmese, D. Brout, R. Chen, D. Scolnic, L. Kelsey, L. Galbany, et al. “The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust.” Monthly Notices of the Royal Astronomical Society 518, no. 2 (January 1, 2023): 1985–2004. https://doi.org/10.1093/mnras/stac3056.
Meldorf C, Palmese A, Brout D, Chen R, Scolnic D, Kelsey L, et al. The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust. Monthly Notices of the Royal Astronomical Society. 2023 Jan 1;518(2):1985–2004.
Meldorf, C., et al. “The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust.” Monthly Notices of the Royal Astronomical Society, vol. 518, no. 2, Jan. 2023, pp. 1985–2004. Scopus, doi:10.1093/mnras/stac3056.
Meldorf C, Palmese A, Brout D, Chen R, Scolnic D, Kelsey L, Galbany L, Hartley WG, Davis TM, Drlica-Wagner A, Vincenzi M, Annis J, Dixon M, Graur O, Lidman C, Möller A, Nugent P, Rose B, Smith M, Allam S, Tucker DL, Asorey J, Calcino J, Carollo D, Glazebrook K, Lewis GF, Taylor G, Tucker BE, Kim AG, Diehl HT, Aguena M, Andrade-Oliveira F, Bacon D, Bertin E, Bocquet S, Brooks D, Burke DL, Carretero J, Kind MC, Castander FJ, Costanzi M, da Costa LN, Desai S, Doel P, Everett S, Ferrero I, Friedel D, Frieman J, García-Bellido J, Gatti M, Gruen D, Gschwend J, Gutierrez G, Hinton SR, Hollowood DL, Honscheid K, James DJ, Kuehn K, March M, Marshall JL, Menanteau F, Miquel R, Morgan R, Paz-Chinchón F, Pereira MES, Malagón AAP, Sanchez E, Scarpine V, Sevilla-Noarbe I, Suchyta E, Tarle G, Varga TN. The Dark Energy Survey Supernova Program results: type Ia supernova brightness correlates with host galaxy dust. Monthly Notices of the Royal Astronomical Society. 2023 Jan 1;518(2):1985–2004.
Journal cover image

Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

January 1, 2023

Volume

518

Issue

2

Start / End Page

1985 / 2004

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0201 Astronomical and Space Sciences