Evidence for a correlation between the Si II λ width and type Ia supernova color

J. Nordin; L. Stman; A. Goobar; C. Balland; H. Lampeitl; R. C. Nichol; M. Sako; D. P. Schneider; M. Smith; J. Sollerman; J. C. Wheeler

doi:10.1088/0004-637X/734/1/42

Evidence for a correlation between the Si II λ width and type Ia supernova color

J. Nordin, L. Stman, A. Goobar, C. Balland, H. Lampeitl, R. C. Nichol, M. Sako, D. P. Schneider, M. Smith, J. Sollerman, J. C. Wheeler

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

We study the pseudo-equivalent width of the Si II λ4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 ≤ z ≤ 0.634. We find that this spectral indicator correlates with the light curve color excess (SALT2c) as well as previously defined spectroscopic subclasses (Branch types) and the evolution of the Si II λ6150 velocity, i.e., the so-called velocity gradient. Based on our study of 55 objects from different surveys, we find indications that the Si II λ4000 spectral indicator could provide important information to improve cosmological distance measurements with SNe Ia.

Original language	English (US)
Article number	42
Journal	Astrophysical Journal
Volume	734
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/734/1/42
State	Published - Jun 10 2011

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1088/0004-637X/734/1/42

Cite this

@article{c3330e6fee8d4dbb8458125bfc7a9408,

title = "Evidence for a correlation between the Si II λ width and type Ia supernova color",

abstract = "We study the pseudo-equivalent width of the Si II λ4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 ≤ z ≤ 0.634. We find that this spectral indicator correlates with the light curve color excess (SALT2c) as well as previously defined spectroscopic subclasses (Branch types) and the evolution of the Si II λ6150 velocity, i.e., the so-called velocity gradient. Based on our study of 55 objects from different surveys, we find indications that the Si II λ4000 spectral indicator could provide important information to improve cosmological distance measurements with SNe Ia.",

author = "J. Nordin and L. Stman and A. Goobar and C. Balland and H. Lampeitl and Nichol, {R. C.} and M. Sako and Schneider, {D. P.} and M. Smith and J. Sollerman and Wheeler, {J. C.}",

year = "2011",

month = jun,

day = "10",

doi = "10.1088/0004-637X/734/1/42",

language = "English (US)",

volume = "734",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Evidence for a correlation between the Si II λ width and type Ia supernova color

AU - Nordin, J.

AU - Stman, L.

AU - Goobar, A.

AU - Balland, C.

AU - Lampeitl, H.

AU - Nichol, R. C.

AU - Sako, M.

AU - Schneider, D. P.

AU - Smith, M.

AU - Sollerman, J.

AU - Wheeler, J. C.

PY - 2011/6/10

Y1 - 2011/6/10

N2 - We study the pseudo-equivalent width of the Si II λ4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 ≤ z ≤ 0.634. We find that this spectral indicator correlates with the light curve color excess (SALT2c) as well as previously defined spectroscopic subclasses (Branch types) and the evolution of the Si II λ6150 velocity, i.e., the so-called velocity gradient. Based on our study of 55 objects from different surveys, we find indications that the Si II λ4000 spectral indicator could provide important information to improve cosmological distance measurements with SNe Ia.

AB - We study the pseudo-equivalent width of the Si II λ4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 ≤ z ≤ 0.634. We find that this spectral indicator correlates with the light curve color excess (SALT2c) as well as previously defined spectroscopic subclasses (Branch types) and the evolution of the Si II λ6150 velocity, i.e., the so-called velocity gradient. Based on our study of 55 objects from different surveys, we find indications that the Si II λ4000 spectral indicator could provide important information to improve cosmological distance measurements with SNe Ia.

UR - http://www.scopus.com/inward/record.url?scp=79958249586&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958249586&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/734/1/42

DO - 10.1088/0004-637X/734/1/42

M3 - Article

AN - SCOPUS:79958249586

SN - 0004-637X

VL - 734

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 42

ER -

Evidence for a correlation between the Si II λ width and type Ia supernova color

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this