SN 2002cx: The most peculiar known type Ia supernova

Weidong Li; Alexei V. Filippenko; Ryan Chornock; Edo Berger; Perry Berlind; Michael L. Calkins; Peter Challis; Chris Fassnacht; Saurabh Jha; Robert P. Kirshner; Thomas Matheson; Wallace L.W. Sargent; Robert A. Simcoe; Graeme H. Smith; Gordon Squires

doi:10.1086/374200

SN 2002cx: The most peculiar known type Ia supernova

Weidong Li, Alexei V. Filippenko, Ryan Chornock, Edo Berger, Perry Berlind, Michael L. Calkins, Peter Challis, Chris Fassnacht, Saurabh Jha, Robert P. Kirshner, Thomas Matheson, Wallace L.W. Sargent, Robert A. Simcoe, Graeme H. Smith, Gordon Squires

School of Arts and Sciences, Physics & Astronomy

Rutgers, The State University

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

233 Scopus citations

Abstract

We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed Type Ia Supernovae (SNe Ia). SN 2002cx exhibits an SN 1991T-like premaximum spectrum, an SN 1991bg-like luminosity, and expansion velocities roughly half those of normal SNe Ia. Photometrically, SN 2002cx has a broad peak in the R band and a plateau phase in the I band, and slow late-time decline. The B-V color evolution is nearly normal, but the V-R and V-I colors are very red. Early-time spectra of SN 2002cx evolve very quickly and are dominated by lines from Fe-group elements; features from intermediate-mass elements (Ca, S, Si) are weak or absent. Mysterious emission lines are observed around 7000 Å at about 3 weeks after maximum brightness. The nebular spectrum of SN 2002cx is also unique, consisting of narrow iron and cobalt lines. The observations of SN 2002cx are inconsistent with the observed spectral/ photometric sequence and provide a major challenge to our understanding of SNe Ia. No existing theoretical model can successfully explain all observed aspects of SN 2002cx.

Original language	American English
Pages (from-to)	453-473
Number of pages	21
Journal	Publications of the Astronomical Society of the Pacific
Volume	115
Issue number	806
DOIs	https://doi.org/10.1086/374200
State	Published - 2003

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Li, W., Filippenko, A. V., Chornock, R., Berger, E., Berlind, P., Calkins, M. L., Challis, P., Fassnacht, C., Jha, S., Kirshner, R. P., Matheson, T., Sargent, W. L. W., Simcoe, R. A., Smith, G. H., & Squires, G. (2003). SN 2002cx: The most peculiar known type Ia supernova. Publications of the Astronomical Society of the Pacific, 115(806), 453-473. https://doi.org/10.1086/374200

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title = "SN 2002cx: The most peculiar known type Ia supernova",

abstract = "We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed Type Ia Supernovae (SNe Ia). SN 2002cx exhibits an SN 1991T-like premaximum spectrum, an SN 1991bg-like luminosity, and expansion velocities roughly half those of normal SNe Ia. Photometrically, SN 2002cx has a broad peak in the R band and a plateau phase in the I band, and slow late-time decline. The B-V color evolution is nearly normal, but the V-R and V-I colors are very red. Early-time spectra of SN 2002cx evolve very quickly and are dominated by lines from Fe-group elements; features from intermediate-mass elements (Ca, S, Si) are weak or absent. Mysterious emission lines are observed around 7000 {\AA} at about 3 weeks after maximum brightness. The nebular spectrum of SN 2002cx is also unique, consisting of narrow iron and cobalt lines. The observations of SN 2002cx are inconsistent with the observed spectral/ photometric sequence and provide a major challenge to our understanding of SNe Ia. No existing theoretical model can successfully explain all observed aspects of SN 2002cx.",

author = "Weidong Li and Filippenko, {Alexei V.} and Ryan Chornock and Edo Berger and Perry Berlind and Calkins, {Michael L.} and Peter Challis and Chris Fassnacht and Saurabh Jha and Kirshner, {Robert P.} and Thomas Matheson and Sargent, {Wallace L.W.} and Simcoe, {Robert A.} and Smith, {Graeme H.} and Gordon Squires",

year = "2003",

doi = "10.1086/374200",

language = "American English",

volume = "115",

pages = "453--473",

journal = "Publications of the Astronomical Society of the Pacific",

issn = "0004-6280",

publisher = "University of Chicago",

number = "806",

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TY - JOUR

T1 - SN 2002cx

T2 - The most peculiar known type Ia supernova

AU - Li, Weidong

AU - Filippenko, Alexei V.

AU - Chornock, Ryan

AU - Berger, Edo

AU - Berlind, Perry

AU - Calkins, Michael L.

AU - Challis, Peter

AU - Fassnacht, Chris

AU - Jha, Saurabh

AU - Kirshner, Robert P.

AU - Matheson, Thomas

AU - Sargent, Wallace L.W.

AU - Simcoe, Robert A.

AU - Smith, Graeme H.

AU - Squires, Gordon

PY - 2003

Y1 - 2003

N2 - We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed Type Ia Supernovae (SNe Ia). SN 2002cx exhibits an SN 1991T-like premaximum spectrum, an SN 1991bg-like luminosity, and expansion velocities roughly half those of normal SNe Ia. Photometrically, SN 2002cx has a broad peak in the R band and a plateau phase in the I band, and slow late-time decline. The B-V color evolution is nearly normal, but the V-R and V-I colors are very red. Early-time spectra of SN 2002cx evolve very quickly and are dominated by lines from Fe-group elements; features from intermediate-mass elements (Ca, S, Si) are weak or absent. Mysterious emission lines are observed around 7000 Å at about 3 weeks after maximum brightness. The nebular spectrum of SN 2002cx is also unique, consisting of narrow iron and cobalt lines. The observations of SN 2002cx are inconsistent with the observed spectral/ photometric sequence and provide a major challenge to our understanding of SNe Ia. No existing theoretical model can successfully explain all observed aspects of SN 2002cx.

AB - We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed Type Ia Supernovae (SNe Ia). SN 2002cx exhibits an SN 1991T-like premaximum spectrum, an SN 1991bg-like luminosity, and expansion velocities roughly half those of normal SNe Ia. Photometrically, SN 2002cx has a broad peak in the R band and a plateau phase in the I band, and slow late-time decline. The B-V color evolution is nearly normal, but the V-R and V-I colors are very red. Early-time spectra of SN 2002cx evolve very quickly and are dominated by lines from Fe-group elements; features from intermediate-mass elements (Ca, S, Si) are weak or absent. Mysterious emission lines are observed around 7000 Å at about 3 weeks after maximum brightness. The nebular spectrum of SN 2002cx is also unique, consisting of narrow iron and cobalt lines. The observations of SN 2002cx are inconsistent with the observed spectral/ photometric sequence and provide a major challenge to our understanding of SNe Ia. No existing theoretical model can successfully explain all observed aspects of SN 2002cx.

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U2 - 10.1086/374200

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IS - 806

ER -

SN 2002cx: The most peculiar known type Ia supernova

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