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Environmental Dependence of Type Ia Supernova Luminosities from a Sample without a Local-Global Difference in Host Star Formation

It is now established that there is a dependence of the luminosity of type Ia supernovae (SNe Ia) on environment: SNe Ia in young, star-forming, metal-poor stellar populations appear fainter after light-curve shape corrections than those in…

Astrophysics of Galaxies · Physics 2018-02-21 Young-Lo Kim , Mathew Smith , Mark Sullivan , Young-Wook Lee

ZTF SN Ia DR2: Colour standardisation of Type Ia Supernovae and its dependence on environment

As type Ia supernova (SN Ia) cosmology transitions from a statistics-dominated to a systematics-dominated era, it is crucial to understand the remaining unexplained uncertainties that affect their luminosity, such as those stemming from…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-19 M. Ginolin , M. Rigault , Y. Copin , B. Popovic , G. Dimitriadis , A. Goobar , J. Johansson , K. Maguire , J. Nordin , M. Smith , M. Aubert , C. Barjou-Delayre , U. Burgaz , B. Carreres , S. Dhawan , M. Deckers , F. Feinstein , D. Fouchez , L. Galbany , C. Ganot , T. de Jaeger , Y. -L. Kim , D. Kuhn , L. Lacroix , T. E. Müller-Bravo , P. Nugent , B. Racine , P. Rosnet , D. Rosselli , F. Ruppin , J. Sollerman , J. H. Terwel , A. Townsend , R. Dekany , M. Graham , M. Kasliwal , S. L. Groom , J. Purdum , B. Rusholme , S. van der Walt

The Foundation Supernova Survey: Motivation, Design, Implementation, and First Data Release

The Foundation Supernova Survey aims to provide a large, high-fidelity, homogeneous, and precisely-calibrated low-redshift Type Ia supernova (SN Ia) sample for cosmology. The calibration of the current low-redshift SN sample is the largest…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Ryan J. Foley , Daniel Scolnic , Armin Rest , S. W. Jha , Y. -C. Pan , A. G. Riess , P. Challis , K. C. Chambers , D. A. Coulter , K. G. Dettman , M. M. Foley , O. D. Fox , M. E. Huber , D. O. Jones , C. D. Kilpatrick , R. P. Kirshner , A. S. B. Schultz , M. R. Siebert , H. A. Flewelling , B. Gibson , E. A. Magnier , J. A. Miller , N. Primak , S. J. Smartt , K. W. Smith , R. J. Wainscoat , C. Waters , M. Willman

Berkeley Supernova Ia Program I: Observations, Data Reduction, and Spectroscopic Sample of 582 Low-Redshift Type Ia Supernovae

In this first paper in a series we present 1298 low-redshift (z\leq0.2) optical spectra of 582 Type Ia supernovae (SNe Ia) observed from 1989 through 2008 as part of the Berkeley SN Ia Program (BSNIP). 584 spectra of 199 SNe Ia have…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Jeffrey M. Silverman , Ryan J. Foley , Alexei V. Filippenko , Mohan Ganeshalingam , Aaron J. Barth , Ryan Chornock , Christopher V. Griffith , Jason J. Kong , Nicholas Lee , Douglas C. Leonard , Thomas Matheson , Emily G. Miller , Thea N. Steele , Brian J. Barris , Joshua S. Bloom , Bethany E. Cobb , Alison L. Coil , Louis-Benoit Desroches , Elinor L. Gates , Luis C. Ho , Saurabh W. Jha , Michael T. Kandrashoff , Weidong Li , Kaisey S. Mandel , Maryam Modjaz , Matthew R. Moore , Robin E. Mostardi , Marina S. Papenkova , Sung Park , Daniel A. Perley , Dovi Poznanski , Cassie A. Reuter , James Scala , Franklin J. D. Serduke , Joseph C. Shields , Brandon J. Swift , John L. Tonry , Schuyler D. Van Dyk , Xiaofeng Wang , Diane S. Wong

Evidence of Environmental Dependencies of Type Ia Supernovae from the Nearby Supernova Factory indicated by Local H{\alpha}

(Abridged) We study the host galaxy regions in close proximity to Type Ia supernovae (SNe Ia) to analyze relations between the properties of SN Ia events and environments most similar to where their progenitors formed. We focus on local…

Cosmology and Nongalactic Astrophysics · Physics 2013-12-09 M. Rigault , Y. Copin , G. Aldering , P. Antilogus , C. Aragon , S. Bailey , C. Baltay , S. Bongard , C. Buton , A. Canto , F. Cellier-Holzem , M. Childress , N. Chotard , H. K. Fakhouri , U. Feindt , M. Fleury , E. Gangler , P. Greskovic , J. Guy , A. G. Kim , M. Kowalski , S. Lombardo , J. Nordin , P. Nugent , R. Pain , E. Pécontal , R. Pereira , S. Perlmutter , D. Rabinowitz , K. Runge , C. Saunders , R. Scalzo , G. Smadja , C. Tao , R. C. Thomas , B. A. Weaver

Evaluating Cosmological Biases using Photometric Redshifts for Type Ia Supernova Cosmology with the Dark Energy Survey Supernova Program

Cosmological analyses with Type Ia Supernovae (SNe Ia) have traditionally been reliant on spectroscopy for both classifying the type of supernova and obtaining reliable redshifts to measure the distance-redshift relation. While obtaining a…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-25 R. Chen , D. Scolnic , M. Vincenzi , E. S. Rykoff , J. Myles , R. Kessler , B. Popovic , M. Sako , M. Smith , P. Armstrong , D. Brout , T. M. Davis , L. Galbany , J. Lee , C. Lidman , A. Möller , B. O. Sánchez , M. Sullivan , H. Qu , P. Wiseman , T. M. C. Abbott , M. Aguena , S. Allam , O. Alves , F. Andrade-Oliveira , J. Annis , D. Bacon , D. Brooks , A. Carnero Rosell , J. Carretero , A. Choi , C. Conselice , L. N. da Costa , M. E. S. Pereira , H. T. Diehl , P. Doel , S. Everett , I. Ferrero , B. Flaugher , J. Frieman , J. García-Bellido , M. Gatti , E. Gaztanaga , G. Giannini , D. Gruen , R. A. Gruendl , G. Gutierrez , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , K. Kuehn , M. Lima , J. L. Marshall , J. Mena-Fernández , F. Menanteau , R. Miquel , R. L. C. Ogando , A. Palmese , A. Pieres , A. A. Plazas Malagón , A. Roodman , S. Samuroff , E. Sanchez , D. Sanchez Cid , I. Sevilla-Noarbe , E. Suchyta , M. E. C. Swanson , G. Tarle , C. To , D. L. Tucker , V. Vikram , N. Weaverdyck , J. Weller

Strongly lensed type Ia supernovae as a precise late-universe probe of measuring the Hubble constant and cosmic curvature

Strongly lensed type Ia supernovae (SNe Ia) are expected to have some advantages in measuring time delays of multiple images, and so they have a great potential to be developed into a powerful late-universe cosmological probe. In this…

Cosmology and Nongalactic Astrophysics · Physics 2022-07-26 Jing-Zhao Qi , Yu Cui , Wei-Hong Hu , Jing-Fei Zhang , Jing-Lei Cui , Xin Zhang

Non-LTE models for synthetic spectra of type Ia supernovae. III. An accelerated lambda iteration procedure for the mutual interaction of strong spectral lines in SN Ia models with and without energy deposition

Context. Spectroscopic analyses to interpret the spectra of the brightest supernovae from the UV to the near-IR provide a powerful tool with great astrophysical potential for the determination of the physical state of the ejecta, their…

Solar and Stellar Astrophysics · Physics 2015-06-16 A. W. A. Pauldrach , T. L. Hoffmann , P. J. N. Hultzsch

Measuring the growth rate of structure with Type IA Supernovae from LSST

We investigate measuring the peculiar motions of galaxies up to $z=0.5$ using Type Ia supernovae (SNe Ia) from LSST, and predict the subsequent constraints on the growth rate of structure. We consider two cases. Our first is based on…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-11 Cullan Howlett , Aaron S. G. Robotham , Claudia D. P. Lagos , Alex G. Kim

The Dark Energy Survey Supernova Program: Modelling selection efficiency and observed core collapse supernova contamination

The analysis of current and future cosmological surveys of type Ia supernovae (SNe Ia) at high-redshift depends on the accurate photometric classification of the SN events detected. Generating realistic simulations of photometric SN surveys…

Cosmology and Nongalactic Astrophysics · Physics 2021-07-14 M. Vincenzi , M. Sullivan , O. Graur , D. Brout , T. M. Davis , C. Frohmaier , L. Galbany , C. P. Gutiérrez , S. R. Hinton , R. Hounsell , L. Kelsey , R. Kessler , E. Kovacs , S. Kuhlmann , J. Lasker , C. Lidman , A. Möller , R. C. Nichol , M. Sako , D. Scolnic , M. Smith , E. Swann , P. Wiseman , J. Asorey , G. F. Lewis , R. Sharp , B. E. Tucker , M. Aguena , S. Allam , S. Avila , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , A. Choi , M. Costanzi , L. N. da Costa , M. E. S. Pereira , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , S. Everett , I. Ferrero , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , D. W. Gerdes , D. Gruen , R. A. Gruendl , G. Gutierrez , D. L. Hollowood , K. Honscheid , B. Hoyle , D. J. James , K. Kuehn , N. Kuropatkin , M. A. G. Maia , P. Martini , F. Menanteau , R. Miquel , R. Morgan , A. Palmese , F. Paz-Chinchón , A. A. Plazas , A. K. Romer , E. Sanchez , V. Scarpine , S. Serrano , I. Sevilla-Noarbe , M. Soares-Santos , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga , A. R. Walker , R. D. Wilkinson

HOLISMOKES XXI: Detecting strongly lensed type Ia supernovae from time series of multi-band LSST-like imaging data -- Part II

Strong gravitationally lensed supernovae (LSNe) are rare but extremely valuable probes of cosmology and astrophysics. Prompt identification within the alert streams of time-domain surveys such as the Rubin Legacy Survey of Space and Time…

Instrumentation and Methods for Astrophysics · Physics 2026-05-08 Satadru Bag , Raoul Canameras , Sherry H. Suyu , Stefan Schuldt , Stefan Taubenberger , Irham Taufik Andika , Alejandra Melo , Ming Kei Chan

Strongly lensed SNe Ia in the era of LSST: observing cadence for lens discoveries and time-delay measurements

The upcoming Large Synoptic Survey Telescope (LSST) will detect many strongly lensed Type Ia supernovae (LSNe Ia) for time-delay cosmography. This will provide an independent and direct way for measuring the Hubble constant $H_0$, which is…

Instrumentation and Methods for Astrophysics · Physics 2019-11-20 S. Huber , S. H. Suyu , U. M. Noebauer , V. Bonvin , D. Rothchild , J. H. H. Chan , H. Awan , F. Courbin , M. Kromer , P. Marshall , M. Oguri , T. Ribeiro , The LSST Dark Energy Science Collaboration

Type Ia Supernova Distances at z > 1.5 from the Hubble Space Telescope Multi-Cycle Treasury Programs: The Early Expansion Rate

We present an analysis of 15 Type Ia supernovae (SNe Ia) at redshift z > 1 (9 at 1.5 < z < 2.3) recently discovered in the CANDELS and CLASH Multi-Cycle Treasury programs using WFC3 on the Hubble Space Telescope. We combine these SNe Ia…

Cosmology and Nongalactic Astrophysics · Physics 2018-02-14 Adam G. Riess , Steven A. Rodney , Daniel M. Scolnic , Daniel L. Shafer , Louis-Gregory Strolger , Henry C. Ferguson , Marc Postman , Or Graur , Dan Maoz , Saurabh W. Jha , Bahram Mobasher , Stefano Casertano , Brian Hayden , Alberto Molino , Jens Hjorth , Peter M. Garnavich , David O. Jones , Robert P. Kirshner , Anton M. Koekemoer , Norman A. Grogin , Gabriel Brammer , Shoubaneh Hemmati , Mark Dickinson , Peter M. Challis , Schuyler Wolff , Kelsey I. Clubb , Alexei V. Filippenko , Hooshang Nayyeri , U Vivian , David C. Koo , Sandra M. Faber , Dale Kocevski , Larry Bradley , Dan Coe

SN Ia Standardization on the Rise: Evidence for the Cosmological Importance of Pre-Maximum Measurements

We present SALT2X, an extension of the SALT2 model for SN Ia supernova light curves. SALT2X separates the light-curve-shape parameter x1 into an x1r and x1f for the rise and fall portions of the light curve. Using the Joint Lightcurve…

Cosmology and Nongalactic Astrophysics · Physics 2019-03-08 Brian Hayden , David Rubin , Mark Strovink

Accounting for Selection Effects in Supernova Cosmology with Simulation-Based Inference and Hierarchical Bayesian Modelling

Type Ia supernovae (SNe Ia) are thermonuclear exploding stars that can be used to put constraints on the nature of our universe. One challenge with population analyses of SNe Ia is Malmquist bias, where we preferentially observe the…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-24 Benjamin M. Boyd , Matthew Grayling , Stephen Thorp , Kaisey S. Mandel

The Ultraviolet Spectra of 2003fg-like Type Ia Supernovae

2003fg-like Type Ia supernovae (03fg-like SNe Ia) are rare subtype of SNe Ia, photometrically characterized by broader optical light curves and bluer ultraviolet (UV) colors compared to normal SNe Ia. In this work, we study four 03fg-like…

High Energy Astrophysical Phenomena · Physics 2025-09-17 Snehasish Bhattacharjee , Yen-Chen Pan , Hao-Yu Miao , Charles D. Kilpatrick , Willem B. Hoogendam , Katie Auchettl , Aaron Do , Yossef Zenati

See Change: VLT spectroscopy of a sample of high-redshift Type Ia supernova host galaxies

The Supernova Cosmology Project has conducted the `See Change' programme, aimed at discovering and observing high-redshift (1.13 $\leq$ z $\leq$ 1.75) Type Ia supernovae (SNe Ia). We used multi-filter Hubble Space Telescope (HST)…

Astrophysics of Galaxies · Physics 2020-05-27 S. C. Williams , I. M. Hook , B. Hayden , J. Nordin , G. Aldering , K. Boone , A. Goobar , C. E. Lidman , S. Perlmutter , D. Rubin , P. Ruiz-Lapuente , C. Saunders

Double-offset Cassegrain telescopes for the Ultraviolet Type Ia (UVIa) mission concept

Our understanding of cosmology is shaped by Type Ia supernovae (SNe Ia), the runaway thermonuclear detonations of white dwarfs via accretion from a companion star. The nature of this companion star is highly debated, with disparate models…

Instrumentation and Methods for Astrophysics · Physics 2025-07-23 Fernando Cruz Aguirre , Keri Hoadley , Curtis McCully , Gillian Kyne , Shouleh Nikzad , John Hennessy , April D. Jewell , Christophe Basset , Daniel Harbeck , Greyson Davis , Leonidas A. Moustakas , D. Andrew Howell , Saurabh W. Jha , David J. Sand , Peter Brown , Ken Shen

The influence of Host Galaxies in Type Ia Supernova Cosmology

We use a sample of 1338 spectroscopically confirmed and photometrically classified Type Ia Supernovae (SNe Ia), sourced from the CSP, CfA, SDSS-II, and SNLS supernova samples, to examine the relationships between SNe Ia and the galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-18 Syed A. Uddin , Jeremy Mould , Chris Lidman , Vanina Ruhlmann-Kleider , Bonnie R. Zhang

Carnegie Supernova Project-II: Near-infrared spectral diversity and template of Type Ia Supernovae

We present the largest and most homogeneous collection of near-infrared (NIR) spectra of Type Ia supernovae (SNe Ia): 339 spectra of 98 individual SNe obtained as part of the Carnegie Supernova Project-II. These spectra, obtained with the…

High Energy Astrophysical Phenomena · Physics 2023-05-10 Jing Lu , Eric Y. Hsiao , Mark M. Phillips , Christopher R. Burns , Chris Ashall , Nidia Morrell , Lawrence Ng , Sahana Kumar , Melissa Shahbandeh , Peter Hoeflich , E. Baron , Syed Uddin , Maximilian D. Stritzinger , Nicholas B. Suntzeff , Charles Baltay , Scott Davis , Tiara R. Diamond , Gaston Folatelli , Francisco Förster , Jonathan Gagné , Lluís Galbany , Christa Gall , Santiago González-Gaitán , Simon Holmbo , Robert P. Kirshner , Kevin Krisciunas , G. H. Marion , Saul Perlmutter , Priscila J. Pessi , Anthony L. Piro , David Rabinowitz , Stuart D. Ryder , David J. Sand