On the nature of the circumstellar medium of the remarkable Type Ia/IIn supernova SN 2002ic

Kotak, R.; Meikle, P.; Adamson, A. J.; Leggett, S. K.

doi:10.1111/j.1365-2966.2004.08306.x

Cited by 83 publications

(110 citation statements)

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“…High-resolution optical spectra exist of relatively few SNe, and this is true of SNe Ia-CSM as well. However, for all SNe Ia-CSM with published high-resolution spectroscopy, narrow (50-100 km s −1 ) P-Cygni profiles have been observed in Hα, as well as a handful of other spectral features (e.g., Kotak et al 2004;Aldering et al 2006;Dilday et al 2012). Unfortunately, the spectra of SNe Ia-CSM presented herein are of such low resolution that we do not expect to observe these subtle features.…”

Section: Other Observations Of Sne Ia-csmmentioning

confidence: 65%

“…The two best-studied SNe Ia-CSM are also found to have IR excesses at late times. SN 2002ic is easily detected in K-band imaging ∼256 days past maximum brightness as well as in H-band and K-band imaging ∼352 days past maximum (Kotak et al 2004). From ∼40-140 days past maximum, SN 2005gj is found to be 2-3 mag brighter and to decline more slowly than normal SNe Ia and SNe IIn in JHK s imaging (Prieto et al 2007).…”

Section: Other Observations Of Sne Ia-csmmentioning

confidence: 97%

“…As already mentioned, the two prototypical and best-studied SNe Ia-CSM are SN 2002ic (Hamuy et al 2003;Deng et al 2004;Kotak et al 2004;Wang et al 2004;Wood-Vasey et al 2004) and SN 2005gj (Aldering et al 2006;Prieto et al 2007). The photometric and spectral evolution of these two objects has been well studied in the works cited above.…”

Section: Sn 2002ic and Sn 2005gjmentioning

confidence: 99%

“…Previously calculated Hα luminosities of SNe Ia-CSM are consistent with this range. Specifically, SN 2002ic had a luminosity of ∼5 × 10 40 erg s −1 (Kotak et al 2004), SN 2005gj had luminosities of (1-10) × 10 40 erg s −1 (Aldering et al 2006;Prieto et al 2007), and SN 2008J had a luminosity of ∼1.3 × 10 41 erg s −1 (Taddia et al 2012).…”

Section: Optical Spectroscopy Of Sne Ia-csmmentioning

confidence: 99%

“…Their light curves are broad and quite long-lived, peaking at absolute magnitudes brighter than about −19 mag. The two best-studied objects in this class are SNe 2002ic and 2005gj (Hamuy et al 2003;Deng et al 2004;Kotak et al 2004;Wang et al 2004;Wood-Vasey et al 2004;Aldering et al 2006;Prieto et al 2007). Until recently there was some debate in the literature as to whether these objects are truly SNe Ia or are in fact some strange flavor of core-collapse SNe (CCSNe; e.g., Benetti et al 2006;Trundle et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium

Silverman¹,

Nugent

Gal‐Yam

et al. 2015

Proc. IAU

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Owing to their utility for measurements of cosmic acceleration, Type Ia supernovae (SNe Ia) are perhaps the beststudied class of SNe, yet the progenitor systems of these explosions largely remain a mystery. A rare subclass of SNe Ia shows evidence of strong interaction with their circumstellar medium (CSM), and in particular, a hydrogenrich CSM; we refer to them as SNe Ia-CSM. In the first systematic search for such systems, we have identified 16 SNe Ia-CSM, and here we present new spectra of 13 of them. Six SNe Ia-CSM have been well studied previously, three were previously known but are analyzed in depth for the first time here, and seven are new discoveries from the Palomar Transient Factory. The spectra of all SNe Ia-CSM are dominated by Hα emission (with widths of ∼2000 km s −1 ) and exhibit large Hα/Hβ intensity ratios (perhaps due to collisional excitation of hydrogen via the SN ejecta overtaking slower-moving CSM shells); moreover, they have an almost complete lack of He i emission. They also show possible evidence of dust formation through a decrease in the red wing of Hα 75-100 days past maximum brightness, and nearly all SNe Ia-CSM exhibit strong Na i D absorption from the host galaxy. The absolute magnitudes (uncorrected for host-galaxy extinction) of SNe Ia-CSM are found to be −21.3 mag M R −19 mag, and they also seem to show ultraviolet emission at early times and strong infrared emission at late times (but no detected radio or X-ray emission). Finally, the host galaxies of SNe Ia-CSM are all late-type spirals similar to the Milky Way, or dwarf irregulars like the Large Magellanic Cloud, which implies that these objects come from a relatively young stellar population. This work represents the most detailed analysis of the SN Ia-CSM class to date.

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Section: Other Observations Of Sne Ia-csmmentioning

confidence: 65%

Section: Other Observations Of Sne Ia-csmmentioning

confidence: 97%

Section: Sn 2002ic and Sn 2005gjmentioning

confidence: 99%

Section: Optical Spectroscopy Of Sne Ia-csmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium

Silverman¹,

Nugent

Gal‐Yam

et al. 2015

Proc. IAU

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show abstract

A review of type Ia supernova spectra

Parrent

Friesen

Parthasarathy

2014

Astrophys Space Sci

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SN 2011fe was the nearest and best-observed type Ia supernova in a generation, and brought previous incomplete datasets into sharp contrast with the detailed new data. In retrospect, documenting spectroscopic behaviors of type Ia supernovae has been more often limited by sparse and incomplete temporal sampling than by consequences of signal-to-noise ratios, telluric features, or small sample sizes. As a result, type Ia supernovae have been primarily studied insofar as parameters discretized by relative epochs and incomplete temporal snapshots near maximum light. Here we discuss a necessary next step toward consistently modeling and directly measuring spectroscopic observables of type Ia supernova spectra. In addition, we analyze current spectroscopic data in the parameter space defined by empirical metrics, which will be relevant even after progenitors are observed and detailed models are refined.

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Supernovae and cosmology

Leibundgut

2007

Gen Relativ Gravit

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The extreme luminosity and their fairly unique temporal behaviour have made supernovae a superb tool to measure distances in the universe. As complex astrophysical events they provide interesting insights into explosion physics, explosive nucleosynthesis, hydrodynamics of the explosion and radiation transport. They are an end product of stellar evolution and provide clues to the stellar composition. Since they can be observed at large distances they have become critical probes to further explore astrophysical effects, like dust properties in external galaxies and the star formation history of galaxies. Some of the astrophysics interferes with the cosmological applications of supernovae. The local velocity field, distorted by the gravitational attraction of the local large scale structure, and the reddening law appear at the moment the major limitations in the accuracy with which cosmological parameters can be determined. These absorption effects can introduce a secondary bias into the observations of the distant supernovae, which needs to be carefully evaluated. Supernovae have been used for the measurement of the Hubble constant, i.e. the current expansion rate of the universe, and the accelerated cosmic expansion directly inferred from the apparent faintness of the distant supernovae.

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On the nature of the circumstellar medium of the remarkable Type Ia/IIn supernova SN 2002ic

Cited by 83 publications

References 13 publications

Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium

Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium

A review of type Ia supernova spectra

Supernovae and cosmology

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