SN2008jb

A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc

J. L. Prieto, J. C. Lee, A. J. Drake, R. McNaught, G. Garradd, J. F. Beacom, Edward C Beshore, M. Catelan, S. G. Djorgovski, G. Pojmanski, K. Z. Stanek, D. M. Szczygieł

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We present the discovery and follow-up observations of SN2008jb, a core-collapse supernova in the southern dwarf irregular galaxy ESO 302-14 (MB = -15.3mag) at 9.6Mpc. This nearby transient was missed by galaxy-targeted surveys and was only found in archival optical images obtained by the Catalina Real-time Transient Survey and the All-Sky Automated Survey. The well-sampled archival photometry shows that SN2008jb was detected shortly after explosion and reached a bright optical maximum, V max ≃ 13.6mag (M V, max ≃ -16.5). The shape of the light curve shows a plateau of 100days, followed by a drop of 1.4mag in the V band to a slow decline with an approximate 56Co decay slope. The late-time light curve is consistent with 0.04 ± 0.01 M ω of 56Ni synthesized in the explosion. A spectrum of the supernova obtained two years after explosion shows a broad, boxy Hα emission line, which is unusual for normal TypeII-Plateau supernovae at late times. We detect the supernova in archival Spitzer and WISE images obtained 8-14 months after explosion, which show clear signs of warm (600-700 K) dust emission. The dwarf irregular host galaxy, ESO 302-14, has a low gas-phase oxygen abundance, 12 + log(O/H) = 8.2 (1/5 Z ω), similar to those of the Small Magellanic Cloud and the hosts of long gamma-ray bursts and luminous core-collapse supernovae. This metallicity is one of the lowest among local (≲ 10Mpc) supernova hosts. We study the host environment using GALEX far-UV, R-band, and Hα images and find that the supernova occurred in a large star formation complex. The morphology of the Hα emission appears as a large shell (R ≃ 350pc) surrounding the FUV and optical emission. Using the Hα-to-FUV ratio and FUV and R-band luminosities, we estimate an age of 9Myr and a total mass of 2 × 105 M ω for the star formation complex, assuming a single-age starburst. These properties are consistent with the expanding Hα supershells observed in many well-studied nearby dwarf galaxies, which are tell-tale signs of feedback from the cumulative effect of massive star winds and supernovae. The age estimated for the star-forming region where SN2008jb exploded suggests a relatively high-mass progenitor star with an initial mass M 20 M ω and warrants further study. We discuss the implications of these findings in the study of core-collapse supernova progenitors.

Original languageEnglish (US)
Article number70
JournalAstrophysical Journal
Volume745
Issue number1
DOIs
StatePublished - Jan 20 2012

Fingerprint

dwarf galaxies
supernovae
explosion
stars
explosions
plateau
irregular galaxies
European Southern Observatory
light curve
star formation
plateaus
shell
dust
oxygen
Wide-field Infrared Survey Explorer
gas
Magellanic clouds
extremely high frequencies
massive stars
gamma ray bursts

Keywords

  • galaxies: dwarf
  • supernovae: general
  • supernovae: individual (SN 2008jb)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Prieto, J. L., Lee, J. C., Drake, A. J., McNaught, R., Garradd, G., Beacom, J. F., ... Szczygieł, D. M. (2012). SN2008jb: A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc. Astrophysical Journal, 745(1), [70]. https://doi.org/10.1088/0004-637X/745/1/70

SN2008jb : A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc. / Prieto, J. L.; Lee, J. C.; Drake, A. J.; McNaught, R.; Garradd, G.; Beacom, J. F.; Beshore, Edward C; Catelan, M.; Djorgovski, S. G.; Pojmanski, G.; Stanek, K. Z.; Szczygieł, D. M.

In: Astrophysical Journal, Vol. 745, No. 1, 70, 20.01.2012.

Research output: Contribution to journalArticle

Prieto, JL, Lee, JC, Drake, AJ, McNaught, R, Garradd, G, Beacom, JF, Beshore, EC, Catelan, M, Djorgovski, SG, Pojmanski, G, Stanek, KZ & Szczygieł, DM 2012, 'SN2008jb: A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc', Astrophysical Journal, vol. 745, no. 1, 70. https://doi.org/10.1088/0004-637X/745/1/70
Prieto, J. L. ; Lee, J. C. ; Drake, A. J. ; McNaught, R. ; Garradd, G. ; Beacom, J. F. ; Beshore, Edward C ; Catelan, M. ; Djorgovski, S. G. ; Pojmanski, G. ; Stanek, K. Z. ; Szczygieł, D. M. / SN2008jb : A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc. In: Astrophysical Journal. 2012 ; Vol. 745, No. 1.
@article{fc69247304ec4bf4b6faf2a963bd6515,
title = "SN2008jb: A {"}lost{"} core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc",
abstract = "We present the discovery and follow-up observations of SN2008jb, a core-collapse supernova in the southern dwarf irregular galaxy ESO 302-14 (MB = -15.3mag) at 9.6Mpc. This nearby transient was missed by galaxy-targeted surveys and was only found in archival optical images obtained by the Catalina Real-time Transient Survey and the All-Sky Automated Survey. The well-sampled archival photometry shows that SN2008jb was detected shortly after explosion and reached a bright optical maximum, V max ≃ 13.6mag (M V, max ≃ -16.5). The shape of the light curve shows a plateau of 100days, followed by a drop of 1.4mag in the V band to a slow decline with an approximate 56Co decay slope. The late-time light curve is consistent with 0.04 ± 0.01 M ω of 56Ni synthesized in the explosion. A spectrum of the supernova obtained two years after explosion shows a broad, boxy Hα emission line, which is unusual for normal TypeII-Plateau supernovae at late times. We detect the supernova in archival Spitzer and WISE images obtained 8-14 months after explosion, which show clear signs of warm (600-700 K) dust emission. The dwarf irregular host galaxy, ESO 302-14, has a low gas-phase oxygen abundance, 12 + log(O/H) = 8.2 (1/5 Z ω), similar to those of the Small Magellanic Cloud and the hosts of long gamma-ray bursts and luminous core-collapse supernovae. This metallicity is one of the lowest among local (≲ 10Mpc) supernova hosts. We study the host environment using GALEX far-UV, R-band, and Hα images and find that the supernova occurred in a large star formation complex. The morphology of the Hα emission appears as a large shell (R ≃ 350pc) surrounding the FUV and optical emission. Using the Hα-to-FUV ratio and FUV and R-band luminosities, we estimate an age of 9Myr and a total mass of 2 × 105 M ω for the star formation complex, assuming a single-age starburst. These properties are consistent with the expanding Hα supershells observed in many well-studied nearby dwarf galaxies, which are tell-tale signs of feedback from the cumulative effect of massive star winds and supernovae. The age estimated for the star-forming region where SN2008jb exploded suggests a relatively high-mass progenitor star with an initial mass M 20 M ω and warrants further study. We discuss the implications of these findings in the study of core-collapse supernova progenitors.",
keywords = "galaxies: dwarf, supernovae: general, supernovae: individual (SN 2008jb)",
author = "Prieto, {J. L.} and Lee, {J. C.} and Drake, {A. J.} and R. McNaught and G. Garradd and Beacom, {J. F.} and Beshore, {Edward C} and M. Catelan and Djorgovski, {S. G.} and G. Pojmanski and Stanek, {K. Z.} and Szczygieł, {D. M.}",
year = "2012",
month = "1",
day = "20",
doi = "10.1088/0004-637X/745/1/70",
language = "English (US)",
volume = "745",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - SN2008jb

T2 - A "lost" core-collapse supernova in a star-forming dwarf galaxy at ∼10Mpc

AU - Prieto, J. L.

AU - Lee, J. C.

AU - Drake, A. J.

AU - McNaught, R.

AU - Garradd, G.

AU - Beacom, J. F.

AU - Beshore, Edward C

AU - Catelan, M.

AU - Djorgovski, S. G.

AU - Pojmanski, G.

AU - Stanek, K. Z.

AU - Szczygieł, D. M.

PY - 2012/1/20

Y1 - 2012/1/20

N2 - We present the discovery and follow-up observations of SN2008jb, a core-collapse supernova in the southern dwarf irregular galaxy ESO 302-14 (MB = -15.3mag) at 9.6Mpc. This nearby transient was missed by galaxy-targeted surveys and was only found in archival optical images obtained by the Catalina Real-time Transient Survey and the All-Sky Automated Survey. The well-sampled archival photometry shows that SN2008jb was detected shortly after explosion and reached a bright optical maximum, V max ≃ 13.6mag (M V, max ≃ -16.5). The shape of the light curve shows a plateau of 100days, followed by a drop of 1.4mag in the V band to a slow decline with an approximate 56Co decay slope. The late-time light curve is consistent with 0.04 ± 0.01 M ω of 56Ni synthesized in the explosion. A spectrum of the supernova obtained two years after explosion shows a broad, boxy Hα emission line, which is unusual for normal TypeII-Plateau supernovae at late times. We detect the supernova in archival Spitzer and WISE images obtained 8-14 months after explosion, which show clear signs of warm (600-700 K) dust emission. The dwarf irregular host galaxy, ESO 302-14, has a low gas-phase oxygen abundance, 12 + log(O/H) = 8.2 (1/5 Z ω), similar to those of the Small Magellanic Cloud and the hosts of long gamma-ray bursts and luminous core-collapse supernovae. This metallicity is one of the lowest among local (≲ 10Mpc) supernova hosts. We study the host environment using GALEX far-UV, R-band, and Hα images and find that the supernova occurred in a large star formation complex. The morphology of the Hα emission appears as a large shell (R ≃ 350pc) surrounding the FUV and optical emission. Using the Hα-to-FUV ratio and FUV and R-band luminosities, we estimate an age of 9Myr and a total mass of 2 × 105 M ω for the star formation complex, assuming a single-age starburst. These properties are consistent with the expanding Hα supershells observed in many well-studied nearby dwarf galaxies, which are tell-tale signs of feedback from the cumulative effect of massive star winds and supernovae. The age estimated for the star-forming region where SN2008jb exploded suggests a relatively high-mass progenitor star with an initial mass M 20 M ω and warrants further study. We discuss the implications of these findings in the study of core-collapse supernova progenitors.

AB - We present the discovery and follow-up observations of SN2008jb, a core-collapse supernova in the southern dwarf irregular galaxy ESO 302-14 (MB = -15.3mag) at 9.6Mpc. This nearby transient was missed by galaxy-targeted surveys and was only found in archival optical images obtained by the Catalina Real-time Transient Survey and the All-Sky Automated Survey. The well-sampled archival photometry shows that SN2008jb was detected shortly after explosion and reached a bright optical maximum, V max ≃ 13.6mag (M V, max ≃ -16.5). The shape of the light curve shows a plateau of 100days, followed by a drop of 1.4mag in the V band to a slow decline with an approximate 56Co decay slope. The late-time light curve is consistent with 0.04 ± 0.01 M ω of 56Ni synthesized in the explosion. A spectrum of the supernova obtained two years after explosion shows a broad, boxy Hα emission line, which is unusual for normal TypeII-Plateau supernovae at late times. We detect the supernova in archival Spitzer and WISE images obtained 8-14 months after explosion, which show clear signs of warm (600-700 K) dust emission. The dwarf irregular host galaxy, ESO 302-14, has a low gas-phase oxygen abundance, 12 + log(O/H) = 8.2 (1/5 Z ω), similar to those of the Small Magellanic Cloud and the hosts of long gamma-ray bursts and luminous core-collapse supernovae. This metallicity is one of the lowest among local (≲ 10Mpc) supernova hosts. We study the host environment using GALEX far-UV, R-band, and Hα images and find that the supernova occurred in a large star formation complex. The morphology of the Hα emission appears as a large shell (R ≃ 350pc) surrounding the FUV and optical emission. Using the Hα-to-FUV ratio and FUV and R-band luminosities, we estimate an age of 9Myr and a total mass of 2 × 105 M ω for the star formation complex, assuming a single-age starburst. These properties are consistent with the expanding Hα supershells observed in many well-studied nearby dwarf galaxies, which are tell-tale signs of feedback from the cumulative effect of massive star winds and supernovae. The age estimated for the star-forming region where SN2008jb exploded suggests a relatively high-mass progenitor star with an initial mass M 20 M ω and warrants further study. We discuss the implications of these findings in the study of core-collapse supernova progenitors.

KW - galaxies: dwarf

KW - supernovae: general

KW - supernovae: individual (SN 2008jb)

UR - http://www.scopus.com/inward/record.url?scp=84862956368&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862956368&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/745/1/70

DO - 10.1088/0004-637X/745/1/70

M3 - Article

VL - 745

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 70

ER -