Related papers: The Outermost Ejecta of Type Ia Supernovae

The Most Slowly Declining Type Ia Supernova 2001ay

We present optical and near-infrared photometry, as well as ground-based optical spectra and Hubble Space Telescope ultraviolet spectra, of the Type Ia supernova (SN) 2001ay. At maximum light the Si II and Mg II lines indicated expansion…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Kevin Krisciunas , Weidong Li , Thomas Matheson , D. Andrew Howell , Maximilian Stritzinger , Greg Aldering , Perry L. Berlind , M. Calkins , Peter Challis , Ryan Chornock , Alexander Conley , Alexei V. Filippenko , Mohan Ganeshalingam , Lisa Germany , Sergio Gonzalez , Samuel D. Gooding , Eric Hsiao , Daniel Kasen , Robert P. Kirshner , G. H. "Howie" Marion , Cesar Muena , Peter E. Nugent , M. Phelps , Mark M. Phillips , Yulei Qiu , Robert Quimby , K. Rines , Jeffrey M. Silverman , Nicholas B. Suntzeff , Rollin C. Thomas , Lifan Wang

Observations of type Ia supernova SN 2020nlb up to 600 days after explosion, and the distance to M85

The type Ia supernova (SN Ia) SN 2020nlb was discovered in the Virgo Cluster galaxy M85 shortly after explosion. Here we present observations that include one of the earliest high-quality spectra and some of the earliest multi-colour…

High Energy Astrophysical Phenomena · Physics 2024-03-01 S. C. Williams , R. Kotak , P. Lundqvist , S. Mattila , P. A. Mazzali , A. Pastorello , A. Reguitti , M. D. Stritzinger , A. Fiore , I. M. Hook , S. Moran , I. Salmaso

Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts

Using archival data of low-redshift (z < 0.01) Type Ia supernovae (SN Ia) and recent observations of high-redshift (0.16 < z <0.64; Matheson et al. 2005) SN Ia, we study the "uniformity'' of the spectroscopic properties of nearby and…

Astrophysics · Physics 2010-11-11 S. Blondin , L. Dessart , B. Leibundgut , D. Branch , P. Hoeflich , J. L. Tonry , T. Matheson , R. J. Foley , R. Chornock , A. V. Filippenko , J. Sollerman , J. Spyromilio , R. P. Kirshner , W. M. Wood-Vasey , A. Clocchiatti , C. Aguilera , B. Barris , A. C. Becker , P. Challis , R. Covarrubias , T. Davis , P. Garnavich , M. Hicken , S. Jha , K. Krisciunas , W. Li , A. Miceli , G. Miknaitis , G. Pignata , J. L. Prieto , A. Rest , A. G. Riess , M. E. Salvo , B. P. Schmidt , R. C. Smith , C. W. Stubbs , N. B. Suntzeff

Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum

A comparative study of spectra of 21 Type Ia supernovae (SNe Ia) obtained about one week before maximum light, and 8 spectra obtained 11 or more days before maximum, is presented. To a large extent the premaximum spectra exhibit the…

Astrophysics · Physics 2009-11-13 David Branch , M. A. Troxel , David J. Jeffery , Kazuhito Hatano , Miriam Musco , Jerod Parrent , E. Baron , Leann Chau Dang , D. Casebeer , Nicholas Hall , Wesley Ketchum

Subluminous Type Ia Supernovae at High Redshift from the Supernova Legacy Survey

The rate evolution of subluminous Type Ia Supernovae is presented using data from the Supernova Legacy Survey. This sub-sample represents the faint and rapidly-declining light-curves of the observed supernova Ia (SN Ia) population here…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 S. Gonzalez-Gaitan , K. Perrett , M. Sullivan , A. Conley , D. A. Howell , R. G. Carlberg , P. Astier , D. Balam , C. Balland , S. Basa , D. Fouchez , J. Guy , D. Hardin , I. M. Hook , R. Pain , C. J. Pritchet , N. Regnault , J. Rich

Studying the Diversity of Type Ia Supernovae in the Ultraviolet: Comparing Models with Observations

In the ultraviolet (UV), Type Ia supernovae (SNe Ia) show a much larger diversity in their properties than in the optical. Using a stationary Monte-Carlo radiative transfer code, a grid of spectra at maximum light was created varying…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 E. S. Walker , S. Hachinger , P. A. Mazzali , R. S. Ellis , M. Sullivan , A. Gal-Yam , D. A. Howell

Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the $Kepler$ 2 Observations

Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the $Kepler$ field. The $Kepler$ data revealed an excess emission in its early light curve, allowing to place interesting…

Solar and Stellar Astrophysics · Physics 2019-01-09 W. Li , X. Wang , J. Vinkó , J. Mo , G. Hosseinzadeh , D. J. Sand , J. Zhang , H. Lin , T. Zhang , L. Wang , J. Zhang , Z. Chen , D. Xiang , L. Rui , F. Huang , X. Li , X. Zhang , L. Li , E. Baron , J. M. Derkacy , X. Zhao , H. Sai , K. Zhang , L. Wang , D. A. Howell , C. McCully , I. Arcavi , S. Valenti , D. Hiramatsu , J. Burke , A. Rest , P. Garnavich , B. E. Tucker , G. Narayan , E. Shaya , S. Margheim , A. Zenteno , A. Villar , G. Dimitriadis , R. J. Foley , Y. -C. Pan , D. A. Coulter , O. D. Fox , S. W. Jha , D. O. Jones , D. N. Kasen , C. D. Kilpatrick , A. L. Piro , A. G. Riess , C. Rojas-Bravo , B. J. Shappee , T. W. -S. Holoien , K. Z. Stanek , M. R. Drout , K. Auchettl , C. S. Kochanek , J. S. Brown , S. Bose , D. Bersier , J. Brimacombe , P. Chen , S. Dong , S. Holmbo , J. A. Muñoz , R. L. Mutel , R. S. Post , J. L. Prieto , J. Shields , D. Tallon , T. A. Thompson , P. J. Vallely , S. Villanueva , S. J. Smartt , K. W. Smith , K. C. Chambers , H. A. Flewelling , M. E. Huber , E. A. Magnier , C. Z. Waters , A. S. B. Schultz , J. Bulger , T. B. Lowe , M. Willman , K. Sárneczky , A. Pál , J. C. Wheeler , A. Bódi , Zs. Bognár , B. Csák , B. Cseh , G. Csörnyei , O. Hanyecz , B. Ignácz , Cs. Kalup , R. Könyves-Tóth , L. Kriskovics , A. Ordasi , I. Rajmon , A. Sódor , R. Szabó , R. Szakáts , G. Zsidi , P. Milne , J. E. Andrews , N. Smith , C. Bilinski , P. J. Brown , J. Nordin , S. C. Williams , L. Galbany , J. Palmerio , I. M. Hook , C. Inserra , K. Maguire , Régis Cartier , A. Razza , C. P. Gutiérrez , J. J. Hermes , J. S. Reding , B. C. Kaiser , J. L. Tonry , A. N. Heinze , L. Denneau , H. Weiland , B. Stalder , G. Barentsen , J. Dotson , T. Barclay , M. Gully-Santiago , C. Hedges , A. M. Cody , S. Howell , J. Coughlin , J. E. Van Cleve , J. Vinícius de Miranda Cardoso , K. A. Larson , K. M. McCalmont-Everton , C. A. Peterson , S. E. Ross , L. H. Reedy , D. Osborne , C. McGinn , L. Kohnert , L. Migliorini , A. Wheaton , B. Spencer , C. Labonde , G. Castillo , G. Beerman , K. Steward , M. Hanley , R. Larsen , R. Gangopadhyay , R. Kloetzel , T. Weschler , V. Nystrom , J. Moffatt , M. Redick , K. Griest , M. Packard , M. Muszynski , J. Kampmeier , R. Bjella , S. Flynn , B. Elsaesser

Supernova search at intermediate z. III. Expansion velocities of the ejecta

We discuss the expansion velocities of different elements in the ejecta of the intermediate-z SNe Ia discovered as a part of the International Time Programme (ITP) project ``Omega and Lambda from Supernovae and the Physics of Supernova…

Astrophysics · Physics 2016-08-30 A. Balastegui , P. Ruiz-Lapuente , J. Mendez , G. Altavilla , M. Irwin , K. Schahmaneche , C. Balland , R. Pain , N. Walton

SN 2005hj: Evidence for Two Classes of Normal-Bright SNe Ia and Implications for Cosmology

HET Optical spectra covering the evolution from about 6 days before to about 5 weeks after maximum light and the ROTSE-IIIb unfiltered light curve of the "Branch-normal" Type Ia Supernova SN 2005hj are presented. The host galaxy shows HII…

Astrophysics · Physics 2009-11-13 Robert Quimby , Peter Höflich , J. Craig Wheeler

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum light, providing an unusually complete…

Astrophysics · Physics 2016-01-26 G. Garavini , G. Folatelli , A. Goobar , S. Nobili , G. Aldering , A. Amadon , R. Amanullah , P. Astier , C. Balland , G. Blanc , M. S. Burns , A. Conley , T. Dahlen , S. E. Deustua , R. Ellis , S. Fabbro , X. Fan , B. Frye , E. L. Gates , R. Gibbons , G. Goldhaber , B. Goldman , D. E. Groom , J. Haissinski , D. Hardin , I. M. Hook , D. A. Howell , D. Kasen , S. Kent , A. G. Kim , R. A. Knop , B. C. Lee , C. Lidman , J. Mendez , G. J. Miller , M. Moniez , A. Mourao , H. Newberg , P. E. Nugent , R. Pain , O. Perdereau , S. Perlmutter , V. Prasad , R. Quimby , J. Raux , N. Regnault , J. Rich , G. T. Richards , P. Ruiz-Lapuente , G. Sainton , B. E. Schaefer , K. Schahmaneche , E. Smith , A. L. Spadafora , V. Stanishev , N. A. Walton , L. Wang , W. M. Wood-Vasey

From Out of the Blue: Swift Links 2002es-like, 2003fg-like, and Early-Time Bump Type Ia Supernovae

We collect a sample of 42 SNe Ia with Swift UV photometry and well-measured early-time light curve rises and find that 2002es-like and 2003fg-like SNe Ia have different pre-peak UV color evolutions compared to normal SNe Ia and other…

High Energy Astrophysical Phenomena · Physics 2025-01-14 W. B. Hoogendam , B. J. Shappee , P. J. Brown , M. A. Tucker , C. Ashall , A. L. Piro

A Physical Basis for the H-band Blue-edge Velocity and Light-Curve Shape Correlation in Context of Type Ia Supernova Explosion Physics

Our recent work demonstrates a correlation between the high-velocity blue edge, $v_{edge}$, of the iron-peak Fe/Co/Ni $H$-band emission feature and the optical light curve shape of normal, transitional and sub-luminous type Ia Supernovae…

High Energy Astrophysical Phenomena · Physics 2019-06-26 C. Ashall , P. Hoeflich , E. Y. Hsiao , M. M. Phillips , M. Stritzinger , E. Baron , A. L. Piro , C. Burns , C. Contreras , S. Davis , L. Galbany , S. Holmbo , R. P. Kirshner , K. Krisciunas , G. H. Marion , N. Morrell , D. J. Sand , M. Shahbandeh , N. B. Suntzeff , F. Taddia

SNLS Spectroscopy: Testing for Evolution in Type Ia Supernovae

Aims: We present a quantitative study of a new data set of high redshift Type Ia supernovae spectra, observed at the Gemini telescopes during the first 34 months of the Supernova Legacy Survey. During this time 123 supernovae candidates…

Astrophysics · Physics 2009-11-13 T. J. Bronder , I. M. Hook , P. Astier , D. Balam , C. Balland , S. Basa , R. G. Carlberg , A. Conley , D. Fouchez , J. Guy , D. A. Howell , J. D. Neill , R. Pain , K. Perrett , C. J. Pritchet , N. Regnault , M. Sullivan , S. Baumont , S. Fabbro , M. Filliol , S. Perlmutter , P. Ripoche

SN2019yvq Does Not Conform to SN Ia Explosion Models

We present new photometric and spectroscopic observations of SN 2019yvq, a Type Ia supernova (SN Ia) exhibiting several peculiar properties including an excess of UV/optical flux within days of explosion, a high SiII velocity, and a low…

High Energy Astrophysical Phenomena · Physics 2021-07-20 M. A. Tucker , C. Ashall , B. J. Shappee , P. J. Vallely , C. S. Kochanek , M. E. Huber , G. S. Anand , J. V. Keane , E. Y. Hsiao , T. W. -S. Holoien

Statistical Connections Between the Properties of Type Ia Supernovae and the B--V Colors of Their Parent Galaxies, and the Value of H$_0$

Statistical connections between the properties of Type Ia supernovae (SNe Ia) and the B--V colors of their parent galaxies are established. Compared to SNe Ia in blue galaxies [B-V$\la$0.75], SNe Ia in redder galaxies have (1) a wider…

Astrophysics · Physics 2016-08-30 David Branch , W. Romanishin , E. Baron

Initial Flash and Spectral Formation of Type Ia Supernovae with An Envelope: Applications to Over-luminous SNe Ia

Over-luminous type Ia supernovae (SNe Ia) show peculiar observational features, for which an explosion of a super-massive white dwarf (WD) beyond the classical Chandrasekhar-limiting mass has been suggested, largely based on their high…

High Energy Astrophysical Phenomena · Physics 2023-03-08 Keiichi Maeda , Ji-an Jiang , Mamoru Doi , Miho Kawabata , Toshikazu Shigeyama

'Super-Chandrasekhar' Type Ia Supernovae at nebular epochs

We present a first systematic comparison of superluminous Type Ia supernovae (SNe Ia) at late epochs, including previously unpublished photometric and spectroscopic observations of SN 2007if, SN 2009dc and SNF20080723-012. Photometrically,…

Solar and Stellar Astrophysics · Physics 2015-06-15 Stefan Taubenberger , Markus Kromer , Stephan Hachinger , Paolo A. Mazzali , Stefano Benetti , Peter E. Nugent , Richard A. Scalzo , Rüdiger Pakmor , Vallery Stanishev , Jason Spyromilio , Filomena Bufano , Stuart A. Sim , Bruno Leibundgut , Wolfgang Hillebrandt

A Compact Circumstellar Shell as the Source of High--velocity Features in SN 2011fe

High-velocity features (HVF), especially of Ca II, are frequently seen in Type Ia supernova observed prior to B-band maximum (Bmax). These HVF evolve in velocity from more than 25,000 km/s, in the days after first light, to about 18,000…

Solar and Stellar Astrophysics · Physics 2017-12-01 Brian W. Mulligan , J. Craig Wheeler

Gamma-rays from SNIa

Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a carbon/oxygen white dwarf in a close binary system. Their optical light curve is powered by thermalized gamma-rays produced by the radioactive decay of…

Astrophysics of Galaxies · Physics 2017-09-11 J. Isern , E. Bravo , P. Jean

Constraints on the Progenitor System of the Type Ia Supernova SN 2011fe/PTF11kly

Type Ia supernovae (SNe) serve as a fundamental pillar of modern cosmology, owing to their large luminosity and a well-defined relationship between light-curve shape and peak brightness. The precision distance measurements enabled by SNe Ia…

Cosmology and Nongalactic Astrophysics · Physics 2012-01-10 Weidong Li , Joshua S. Bloom , Philipp Podsiadlowski , Adam A. Miller , S. Bradley Cenko , Saurabh W. Jha , Mark Sullivan , D. Andrew Howell , Peter E. Nugent , Nathaniel R. Butler , Eran O. Ofek , Mansi M. Kasliwal , Joseph W. Richards , Alan Stockton , Hsin-Yi Shih , Lars Bildsten , Michael M. Shara , Joanne Bibby , Alexei V. Filippenko , Mohan Ganeshalingam , Jeffrey M. Silverman , S. R. Kulkarni , Nicholas M. Law , Dovi Poznanski , Robert M. Quimby , Curtis McCully , Brandon Patel , Kate Maguire