Possible detection of the stellar donor or remnant for the type Iax supernova 2008ha

Ryan J. Foley, Curtis McCully, Saurabh Jha, Lars Bildsten, Wen Fai Fong, Gautham Narayan, Armin Rest, Maximilian D. Stritzinger

Research output: Contribution to journalArticle

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Abstract

Type Iax supernovae (SNe Iax) are thermonuclear explosions that are related to SNe Ia, but are physically distinct. The most important differences are that SNe Iax have significantly lower luminosity (1%-50% that of typical SNe Ia), lower ejecta mass (0.1-0.5 M), and may leave a bound remnant. The most extreme SN Iax is SN 2008ha, which peaked at MV = -14.2 mag, about 5 mag below that of typical SNe Ia. Here, we present Hubble Space Telescope (HST) images of UGC 12682, the host galaxy of SN 2008ha, taken 4.1 yr after the peak brightness of SN 2008ha. In these deep, high-resolution images, we detect a source coincident (0.86 HST pixels; 0.″043; 1.1σ) with the position of SN 2008ha with MF814W = -5.4 mag. We determine that this source is unlikely to be a chance coincidence, but that scenario cannot be completely ruled out. If this source is directly related to SN 2008ha, it is either the luminous bound remnant of the progenitor white dwarf (WD) or its companion star. The source is consistent with being an evolved >3 M initial mass star, and is significantly redder than the SN Iax 2012Z progenitor system, the first detected progenitor system for a thermonuclear SN. If this source is the companion star for SN 2008ha, there is a diversity in SN Iax progenitor systems, perhaps related to the diversity in SN Iax explosions. If the source is the bound remnant of the WD, it must have expanded significantly. Regardless of the nature of this source, we constrain the progenitor system of SN 2008ha to have an age of <80 Myr.

Original languageEnglish (US)
Article number29
JournalAstrophysical Journal
Volume792
Issue number1
DOIs
StatePublished - Sep 1 2014

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supernovae
explosion
image resolution
ejecta
pixel
companion stars
Hubble Space Telescope
thermonuclear explosions
detection
explosions
brightness
pixels
luminosity
galaxies
stars
high resolution

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • galaxies: individual (UGC 12682)
  • supernovae: general
  • supernovae: individual (SN 2008ha)

Cite this

Foley, R. J., McCully, C., Jha, S., Bildsten, L., Fong, W. F., Narayan, G., ... Stritzinger, M. D. (2014). Possible detection of the stellar donor or remnant for the type Iax supernova 2008ha. Astrophysical Journal, 792(1), [29]. https://doi.org/10.1088/0004-637X/792/1/29
Foley, Ryan J. ; McCully, Curtis ; Jha, Saurabh ; Bildsten, Lars ; Fong, Wen Fai ; Narayan, Gautham ; Rest, Armin ; Stritzinger, Maximilian D. / Possible detection of the stellar donor or remnant for the type Iax supernova 2008ha. In: Astrophysical Journal. 2014 ; Vol. 792, No. 1.
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Foley, RJ, McCully, C, Jha, S, Bildsten, L, Fong, WF, Narayan, G, Rest, A & Stritzinger, MD 2014, 'Possible detection of the stellar donor or remnant for the type Iax supernova 2008ha', Astrophysical Journal, vol. 792, no. 1, 29. https://doi.org/10.1088/0004-637X/792/1/29

Possible detection of the stellar donor or remnant for the type Iax supernova 2008ha. / Foley, Ryan J.; McCully, Curtis; Jha, Saurabh; Bildsten, Lars; Fong, Wen Fai; Narayan, Gautham; Rest, Armin; Stritzinger, Maximilian D.

In: Astrophysical Journal, Vol. 792, No. 1, 29, 01.09.2014.

Research output: Contribution to journalArticle

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AU - Foley, Ryan J.

AU - McCully, Curtis

AU - Jha, Saurabh

AU - Bildsten, Lars

AU - Fong, Wen Fai

AU - Narayan, Gautham

AU - Rest, Armin

AU - Stritzinger, Maximilian D.

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