Skip navigation
Skip navigation

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

Blondin, Stephane; Dessart, Luc; Leibundgut, Bruno; Branch, David; Hoflich, Peter; Tonry, John; Matheson, Thomas; Foley, Ryan; Sollerman, Jesper; Kirshner, Robert P; Clocchiatti, Alejandro; Aguilera, Claudio; Becker, Andrew C; Davis, Tamara; Garnavich, Peter M; Hicken, Malcolm; Miknaitis, Gajus; Prieto, Jose Luis; Riess, Adam; Salvo, Maria; Schmidt, Brian

Description

Using archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study the "uniformity" of the spectroscopic properties of nearby and distant SNe Ia. We find no difference in the measurements we describe here. In this paper we base our analysis solely on line-profile morphology, focusing on measurements of the velocity location of maximum absorption (v abs) and peak...[Show more]

dc.contributor.authorBlondin, Stephane
dc.contributor.authorDessart, Luc
dc.contributor.authorLeibundgut, Bruno
dc.contributor.authorBranch, David
dc.contributor.authorHoflich, Peter
dc.contributor.authorTonry, John
dc.contributor.authorMatheson, Thomas
dc.contributor.authorFoley, Ryan
dc.contributor.authorSollerman, Jesper
dc.contributor.authorKirshner, Robert P
dc.contributor.authorClocchiatti, Alejandro
dc.contributor.authorAguilera, Claudio
dc.contributor.authorBecker, Andrew C
dc.contributor.authorDavis, Tamara
dc.contributor.authorGarnavich, Peter M
dc.contributor.authorHicken, Malcolm
dc.contributor.authorMiknaitis, Gajus
dc.contributor.authorPrieto, Jose Luis
dc.contributor.authorRiess, Adam
dc.contributor.authorSalvo, Maria
dc.contributor.authorSchmidt, Brian
dc.date.accessioned2015-12-08T22:14:09Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/30106
dc.description.abstractUsing archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study the "uniformity" of the spectroscopic properties of nearby and distant SNe Ia. We find no difference in the measurements we describe here. In this paper we base our analysis solely on line-profile morphology, focusing on measurements of the velocity location of maximum absorption (v abs) and peak emission (v peak). Our measurement technique makes it easier to compare low and high signal-to-noise ratio observations. We also quantify the associated sources of error, assessing the effect of line blending with assistance from the parameterized code SYNOW. We find that the evolution of v abs and v peak for our sample lines (Ca II λ3945, Si II λ6355, and S II λλ5454, 5640) is similar for both the low- and high-redshift samples. We find that v abs for the weak S II λλ5454, 5640 lines and v peak for S II λ5454 can be used to identify fast-declining [Δm 15(B) > 1.7] SNe Ia, which are also subluminous. In addition, we give the first direct evidence in two high-z SN Ia spectra of a double-absorption feature in Ca II λ3945, an event also observed, although infrequently, in low-redshift SN Ia spectra (6 out of 22 SNe Ia in our local sample). Moreover, echoing the recent studies of Dessart & Hillier in the context of Type II supernovae (SNe II), we see similar P Cygni line profiles in our large sample of SN Ia spectra. First, the magnitude of the velocity location at maximum profile absorption may underestimate that at the continuum photosphere, as observed, for example, in the optically thinner line S II λ5640. Second, we report for the first time the unambiguous and systematic intrinsic blueshift of peak emission of optical P Cygni line profiles in SN Ia spectra, by as much as 8000 km s -1. All the high-z SNe Ia analyzed in this paper were discovered and followed up by the ESSENCE collaboration and are now publicly available.
dc.description.sponsorshipThe ESSENCE project is supported primarily by grants AST 02-06329 and AST 04-43378 from the US National Science Foundation (NSF). S. B. acknowledges support from the International Max Planck Research School on Astrophysics via a graduate fellowship. A. V. F. is grateful for the support of NSF grant AST 03-07894 and for a Miller Research Professorship at the University of California, Berkeley, during which part of this work was completed.
dc.format19 pages
dc.publisherUniversity of Chicago Press
dc.rights© 2006. The American Astronomical Society.
dc.sourceAstronomical Journal
dc.subjectKeywords: Cosmology: observations; Line: formation; Line: profiles; Supernovae: general
dc.titleUsing Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume131
dc.date.issued2006
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu4114753xPUB71
local.type.statusPublished Version
local.contributor.affiliationBlondin, Stephane, European Southern Observatory
local.contributor.affiliationDessart, Luc, University of Arizona
local.contributor.affiliationLeibundgut, Bruno, European Southern Observatory
local.contributor.affiliationBranch, David, University of Oklahoma
local.contributor.affiliationHoflich, Peter, University of Texas
local.contributor.affiliationTonry, John, University of Hawaii
local.contributor.affiliationMatheson, Thomas, National Optical Astronomy Observatory
local.contributor.affiliationFoley, Ryan, University of California
local.contributor.affiliationSollerman, Jesper, Stockholm Observatory
local.contributor.affiliationKirshner, Robert P, Harvard-Smithsonian Center for Astrophysics
local.contributor.affiliationClocchiatti, Alejandro, Pontifica Universidad Catolica (Astronomy)
local.contributor.affiliationAguilera, Claudio, Cerro Tololo Inter-American Observatory
local.contributor.affiliationBecker, Andrew C, University of Washington
local.contributor.affiliationDavis, Tamara, College of Physical and Mathematical Sciences, The Australian National University
local.contributor.affiliationGarnavich, Peter M, University of Notre Dame
local.contributor.affiliationHicken, Malcolm, Harvard-Smithsonian Center for Astrophysics
local.contributor.affiliationMiknaitis, Gajus, University of Washington
local.contributor.affiliationPrieto, Jose Luis, Ohio State University
local.contributor.affiliationRiess, Adam, Space Telescope Science Institute
local.contributor.affiliationSalvo, Maria, College of Physical and Mathematical Sciences, The Australian National University
local.contributor.affiliationSchmidt, Brian, College of Physical and Mathematical Sciences, The Australian National University
local.identifier.essn1538-3881
local.bibliographicCitation.startpage1648
local.bibliographicCitation.lastpage1666
local.identifier.doi10.1086/498724
dc.date.updated2015-12-08T07:48:15Z
local.identifier.scopusID2-s2.0-33645218433
dcterms.accessRightsOpen Access
dc.provenancehttp://www.sherpa.ac.uk/romeo/issn/0004-6256/ Author can archive publisher's version/PDF. Publisher's version/PDF may be used on any website or authors' institutional repository (Sherpa/Romeo as of 23/10/2018).
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Blondin_Using_Line_Profiles_to_Test_2006.pdf4.34 MBAdobe PDF


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator