An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my

Douglas C. Leonard, Avishay Gal-Yam, Derek B. Fox, P. B. Cameron, Erik M. Johansson, Adam L. Kraus, David Le Mignant, Marcos A. Van Dam

Research output: Contribution to journalArticle

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Abstract

We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star or to constrain its properties. Following image registration, we find that an isolated stellar object is not detected at the location of SN 2006my in either of the two pre-SN images. In the first, an I-band image obtained with the Wide-Field and Planetary Camera 2 on board the Hubble Space Telescope, the offset between the SN 2006my location and a detected source ("Source 1") is too large: ≥0.08″, which corresponds to a confidence level of non-association of 96% from our most liberal estimates of the transformation and measurement uncertainties. In the second, a similarly obtained V-band image, a source is detected ("Source 2") that has overlap with the SN 2006my location but is definitively an extended object. Through artificial star tests carried out on the precise location of SN 2006my in the images, we derive a 3 σ upper bound on the luminosity of a red supergiant that could have remained undetected in our pre-SN images of log L/L = 5.10, which translates to an upper bound on such a star's initial mass of 15 M from the STARS stellar evolutionary models. Although considered unlikely, we can not rule out the possibility that part of the light comprising Source 1, which exhibits a slight extension relative to other point sources in the image, or part of the light contributing to the extended Source 2, may be due to the progenitor of SN 2006my. Only additional, high-resolution observations of the site taken after SN 2006my has faded beyond detection can confirm or reject these possibilities.

Original languageEnglish (US)
Pages (from-to)1259-1266
Number of pages8
JournalPublications of the Astronomical Society of the Pacific
Volume120
Issue number874
DOIs
StatePublished - Dec 1 2008

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supernovae
plateaus
plateau
image resolution
stars
point source
stellar models
high resolution
extremely high frequencies
Hubble Space Telescope
point sources
confidence
light sources
cameras
luminosity

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Leonard, D. C., Gal-Yam, A., Fox, D. B., Cameron, P. B., Johansson, E. M., Kraus, A. L., ... Van Dam, M. A. (2008). An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my. Publications of the Astronomical Society of the Pacific, 120(874), 1259-1266. https://doi.org/10.1086/595797
Leonard, Douglas C. ; Gal-Yam, Avishay ; Fox, Derek B. ; Cameron, P. B. ; Johansson, Erik M. ; Kraus, Adam L. ; Le Mignant, David ; Van Dam, Marcos A. / An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my. In: Publications of the Astronomical Society of the Pacific. 2008 ; Vol. 120, No. 874. pp. 1259-1266.
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abstract = "We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star or to constrain its properties. Following image registration, we find that an isolated stellar object is not detected at the location of SN 2006my in either of the two pre-SN images. In the first, an I-band image obtained with the Wide-Field and Planetary Camera 2 on board the Hubble Space Telescope, the offset between the SN 2006my location and a detected source ({"}Source 1{"}) is too large: ≥0.08″, which corresponds to a confidence level of non-association of 96{\%} from our most liberal estimates of the transformation and measurement uncertainties. In the second, a similarly obtained V-band image, a source is detected ({"}Source 2{"}) that has overlap with the SN 2006my location but is definitively an extended object. Through artificial star tests carried out on the precise location of SN 2006my in the images, we derive a 3 σ upper bound on the luminosity of a red supergiant that could have remained undetected in our pre-SN images of log L/L⊙ = 5.10, which translates to an upper bound on such a star's initial mass of 15 M⊙ from the STARS stellar evolutionary models. Although considered unlikely, we can not rule out the possibility that part of the light comprising Source 1, which exhibits a slight extension relative to other point sources in the image, or part of the light contributing to the extended Source 2, may be due to the progenitor of SN 2006my. Only additional, high-resolution observations of the site taken after SN 2006my has faded beyond detection can confirm or reject these possibilities.",
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Leonard, DC, Gal-Yam, A, Fox, DB, Cameron, PB, Johansson, EM, Kraus, AL, Le Mignant, D & Van Dam, MA 2008, 'An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my', Publications of the Astronomical Society of the Pacific, vol. 120, no. 874, pp. 1259-1266. https://doi.org/10.1086/595797

An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my. / Leonard, Douglas C.; Gal-Yam, Avishay; Fox, Derek B.; Cameron, P. B.; Johansson, Erik M.; Kraus, Adam L.; Le Mignant, David; Van Dam, Marcos A.

In: Publications of the Astronomical Society of the Pacific, Vol. 120, No. 874, 01.12.2008, p. 1259-1266.

Research output: Contribution to journalArticle

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T1 - An upper mass limit on a red supergiant progenitor for the Type II-plateau supernova SN 2006my

AU - Leonard, Douglas C.

AU - Gal-Yam, Avishay

AU - Fox, Derek B.

AU - Cameron, P. B.

AU - Johansson, Erik M.

AU - Kraus, Adam L.

AU - Le Mignant, David

AU - Van Dam, Marcos A.

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N2 - We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star or to constrain its properties. Following image registration, we find that an isolated stellar object is not detected at the location of SN 2006my in either of the two pre-SN images. In the first, an I-band image obtained with the Wide-Field and Planetary Camera 2 on board the Hubble Space Telescope, the offset between the SN 2006my location and a detected source ("Source 1") is too large: ≥0.08″, which corresponds to a confidence level of non-association of 96% from our most liberal estimates of the transformation and measurement uncertainties. In the second, a similarly obtained V-band image, a source is detected ("Source 2") that has overlap with the SN 2006my location but is definitively an extended object. Through artificial star tests carried out on the precise location of SN 2006my in the images, we derive a 3 σ upper bound on the luminosity of a red supergiant that could have remained undetected in our pre-SN images of log L/L⊙ = 5.10, which translates to an upper bound on such a star's initial mass of 15 M⊙ from the STARS stellar evolutionary models. Although considered unlikely, we can not rule out the possibility that part of the light comprising Source 1, which exhibits a slight extension relative to other point sources in the image, or part of the light contributing to the extended Source 2, may be due to the progenitor of SN 2006my. Only additional, high-resolution observations of the site taken after SN 2006my has faded beyond detection can confirm or reject these possibilities.

AB - We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star or to constrain its properties. Following image registration, we find that an isolated stellar object is not detected at the location of SN 2006my in either of the two pre-SN images. In the first, an I-band image obtained with the Wide-Field and Planetary Camera 2 on board the Hubble Space Telescope, the offset between the SN 2006my location and a detected source ("Source 1") is too large: ≥0.08″, which corresponds to a confidence level of non-association of 96% from our most liberal estimates of the transformation and measurement uncertainties. In the second, a similarly obtained V-band image, a source is detected ("Source 2") that has overlap with the SN 2006my location but is definitively an extended object. Through artificial star tests carried out on the precise location of SN 2006my in the images, we derive a 3 σ upper bound on the luminosity of a red supergiant that could have remained undetected in our pre-SN images of log L/L⊙ = 5.10, which translates to an upper bound on such a star's initial mass of 15 M⊙ from the STARS stellar evolutionary models. Although considered unlikely, we can not rule out the possibility that part of the light comprising Source 1, which exhibits a slight extension relative to other point sources in the image, or part of the light contributing to the extended Source 2, may be due to the progenitor of SN 2006my. Only additional, high-resolution observations of the site taken after SN 2006my has faded beyond detection can confirm or reject these possibilities.

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