Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova*

@article{Wang2003SpectropolarimetryOS,
  title={Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova*},
  author={Lifan Wang and Dietrich Baade and P. Hoeflich and Alexei M. Khokhlov and J. Craig Wheeler and Daniel N. Kasen and Peter E. Nugent and Claes Fransson and Peter Lundqvist},
  journal={The Astrophysical Journal},
  year={2003},
  volume={591},
  pages={1110-1128}
}
High-quality spectropolarimetry (range 417-860 nm; spectral resolution 1.27 nm and 0.265 nm pixel-1) of the Type Ia supernova (SN Ia) 2001el was obtained with the ESO Very Large Telescope Melipal (+FORS1) at five epochs. The spectra a week before maximum and around maximum indicate photospheric expansion velocities of about 10,000 km s-1. Prior to optical maximum, the linear polarization of the continuum was ≈0.2%-0.3% with a constant position angle, showing that SN 2001el has a well-defined… Expand

Tables from this paper

A Spectropolarimetric View on the Nature of the Peculiar Type I SN 2005hk
We report two spectropolarimetric observations of SN 2005hk, which is a close copy of the "very peculiar" SN 2002cx, showing low peak luminosity, slow decline, high ionization near peak, and anExpand
Spectropolarimetry of the Peculiar Type Ia Supernova 2005hk
ABSTRACT We present Keck spectropolarimetry of the unusual Type Ia supernova (SN Ia) 2005hk several days before maximum light. An analysis of the high signal‐to‐noise ratio total‐flux spectrum showsExpand
VLT spectropolarimetry of the fast expanding type Ia SN 2006X
Aims. The main goal of this study is to probe the ejecta geometry and to get otherwise unobtainable information about the explosion mechanism of type Ia Supernovae (SNe). Methods. Using VLT-FORS1 weExpand
Optical Spectropolarimetry and Asphericity of the Type Ic SN 2007gr
We present an optical spectropolarimetric observation of the Type Ic supernova (SN) 2007gr made with the Subaru Telescope at 21 days after maximum brightness (~37 days after the explosion). NonzeroExpand
Premaximum Spectropolarimetry of the Type Ia SN 2004dt
We report observations of SN 2004dt obtained with the Very Large Telescope (VLT) of the European Southern Observatory (ESO) on 2004 August 13.30, when the supernova was more than a week beforeExpand
SPECTROPOLARIMETRY OF EXTREMELY LUMINOUS TYPE Ia SUPERNOVA 2009dc: NEARLY SPHERICAL EXPLOSION OF SUPER-CHANDRASEKHAR MASS WHITE DWARF
We present the first spectropolarimetric observations of a candidate of super-Chandrasekhar mass Type Ia supernova (SN): SN 2009dc. The observations were performed at 5.6 and 89.5 days after theExpand
VLT spectropolarimetry of the optical transient in NGC 300 - Evidence of asymmetry in the circumstellar dust
Aims. We study possible signs of asymmetry in the bright optical transient in NGC 300, to obtain independent information about the explosion mechanism, the progenitor star and its circumstellarExpand
Spectropolarimetry of the Type IIb Supernova 2001ig
We present spectropolarimetric observations of the Type IIb SN 2001ig in NGC 7424; conducted with the ESO VLT FORS1 on 2001 December 16, 2002 January 3, and 2002 August 16, or 13, 31, and 256 daysExpand
Signatures of the circumstellar environment in a normal type Ia supernova
We present observations of the Type Ia supernova 2003du obtained with the Hobby-Eberly Telescope and report the detection of a high-velocity component in the Ca II infrared triplet near 8000 A,Expand
Evidence for Spectropolarimetric Diversity in Type Ia Supernovae
We present single-epoch, postmaximum spectropolarimetry of four Type Ia supernovae (SNe Ia) that span a range of spectral and photometric properties: SN 2002bf and SN 2004dt exhibit unusuallyExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 59 REFERENCES
Evidence for Asphericity in the Type IIn Supernova SN 1998S
We present optical spectropolarimetry obtained at the Keck II 10 m telescope on 1998 March 7 UT along with total flux spectra spanning the first 494 days after discovery (1998 March 2 UT) of theExpand
Evidence for Asphericity in a Subluminous Type Ia Supernova: Spectropolarimetry of SN 1999by
We present polarization spectra near maximum light for the strongly subluminous Type Ia supernova SN 1999by that show that the supernova is intrinsically polarized. SN 1999by has an observed, overallExpand
Is It Round? Spectropolarimetry of the Type II-p Supernova 1999em
We present the first multiepoch spectropolarimetry of a Type II plateau supernova (SN II-P), with optical observations of SN 1999em on days 7, 40, 49, 159, and 163 after discovery. These data areExpand
Infrared Spectra of the Subluminous Type Ia Supernova SN 1999by
Near-infrared (NIR) spectra of the subluminous Type Ia supernova SN 1999by are presented that cover the time evolution from about 4 days before to 2 weeks after maximum light. Analysis of these dataExpand
Bipolar Supernova Explosions
We discuss the optical spectropolarimetry of several core-collapse supernovae, SN 1996cb (Type IIB), SN 1997X (Type Ic), and SN 1998S (Type IIn). The data show polarization evolution of severalExpand
Optical and Infrared Photometry of the Nearby Type Ia Supernova 2001el
We present well-sampled optical (UBVRI) and infrared (JHK) light curves of the nearby (≈18.0 Mpc) Type Ia supernova SN 2001el, from 11 days before to 142 days after the time of B-band maximum. TheExpand
Spectropolarimetry of SN 1993J in NGC 3031
We have obtained low-resolution optical spectropolarimetry of SN 1993J which shows a high continuum linear polarization and a 0.5% drop in polarization across the Ha emission line accompanied by aExpand
Infrared and optical spectroscopy of type Ia supernovae in the nebular phase
We present near-infrared (NIR) spectra for Type Ia supernovae al epochs of 13 to 338 d after maximum blue light. Some contemporary optical spectra are also shown. All the NIR spectra exhibitExpand
PROBING THE GEOMETRY AND CIRCUMSTELLAR ENVIRONMENT OF SN 1993J IN M81
We have monitored the polarized radiation of the Type IIb SN 1993J in M81 over a period of 41 days, starting from 7 days after the explosion on 1993 March 27.5 (UT). Our data show clear evidence thatExpand
Broadband Polarimetry of Supernovae: SN 1994D, SN 1994Y, SN 1994ae, SN 1995D, and SN 1995H
We have made polarimetric observations of three Type Ia supernovae (SN Ia) and two type II supernovae (SN II). No significant polarization was detected for any of the SN Ia down to the level ofExpand
...
1
2
3
4
5
...