PESSTO monitoring of SN 2012hn: Further heterogeneity among faint type I supernovae

S. Valenti, F. Yuan, S. Taubenberger, K. Maguire, A. Pastorello, S. Benetti, S. J. Smartt, E. Cappellaro, D. A. Howell, L. Bildsten, K. Moore, M. Stritzinger, J. P. Anderson, S. Benitez-Herrera, F. Bufano, S. Gonzalez-Gaitan, M. G. McCrum, G. Pignata, M. Fraser, A. Gal-YamL. Le Guillou, C. Inserra, D. E. Reichart, R. Scalzo, M. Sullivan, O. Yaron, D. R. Young

Resultado de la investigación: Article

26 Citas (Scopus)

Resumen

We present optical and infrared monitoring data of SN2012hn collected by the Public European Southern Observatory Spectroscopic Survey for Transient Objects. We show that SN 2012hn has a faint peak magnitude (MR ~ -15.65) and shows no hydrogen and no clear evidence for helium in its spectral evolution. Instead, we detect prominent Ca II lines at all epochs, which relates this transient to previously described 'Ca-rich' or 'gap' transients. However, the photospheric spectra (from -3 to +32 d with respect to peak) of SN 2012hn show a series of absorption lines which are unique and a red continuum that is likely intrinsic rather than due to extinction. Lines of Ti II and Cr II are visible. Thismay be a temperature effect,which could also explain the red photospheric colour. A nebular spectrum at +150 d shows prominent Ca II, OI, CI and possibly MgI lines which appear similar in strength to those displayed by core-collapse supernovae (SNe). To add to the puzzle, SN 2012hn is located at a projected distance of 6 kpc from an E/S0 host and is not close to any obvious star-forming region. Overall SN 2012hn resembles a group of faint H-poor SNe that have been discovered recently and for which a convincing and consistent physical explanation is still missing. They all appear to explode preferentially in remote locations offset from a massive host galaxy with deep limits on any dwarf host galaxies, favouring old progenitor systems. SN 2012hn adds heterogeneity to this sample of objects.We discuss potential explosion channels including He-shell detonations and double detonations of white dwarfs as well as peculiar core-collapse SNe.

Idioma originalEnglish
Número de artículostt1983
Páginas (desde-hasta)1519-1533
Número de páginas15
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen437
N.º2
DOI
EstadoPublished - 1 nov 2013

Huella dactilar

supernovae
detonation
monitoring
temperature effect
helium
explosion
observatory
extinction
hydrogen
shell
dwarf galaxies
European Southern Observatory
temperature effects
explosions
time measurement
galaxies
continuums
color
stars
public

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Valenti, S., Yuan, F., Taubenberger, S., Maguire, K., Pastorello, A., Benetti, S., ... Young, D. R. (2013). PESSTO monitoring of SN 2012hn: Further heterogeneity among faint type I supernovae. Monthly Notices of the Royal Astronomical Society, 437(2), 1519-1533. [stt1983]. https://doi.org/10.1093/mnras/stt1983
Valenti, S. ; Yuan, F. ; Taubenberger, S. ; Maguire, K. ; Pastorello, A. ; Benetti, S. ; Smartt, S. J. ; Cappellaro, E. ; Howell, D. A. ; Bildsten, L. ; Moore, K. ; Stritzinger, M. ; Anderson, J. P. ; Benitez-Herrera, S. ; Bufano, F. ; Gonzalez-Gaitan, S. ; McCrum, M. G. ; Pignata, G. ; Fraser, M. ; Gal-Yam, A. ; Le Guillou, L. ; Inserra, C. ; Reichart, D. E. ; Scalzo, R. ; Sullivan, M. ; Yaron, O. ; Young, D. R. / PESSTO monitoring of SN 2012hn : Further heterogeneity among faint type I supernovae. En: Monthly Notices of the Royal Astronomical Society. 2013 ; Vol. 437, N.º 2. pp. 1519-1533.
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abstract = "We present optical and infrared monitoring data of SN2012hn collected by the Public European Southern Observatory Spectroscopic Survey for Transient Objects. We show that SN 2012hn has a faint peak magnitude (MR ~ -15.65) and shows no hydrogen and no clear evidence for helium in its spectral evolution. Instead, we detect prominent Ca II lines at all epochs, which relates this transient to previously described 'Ca-rich' or 'gap' transients. However, the photospheric spectra (from -3 to +32 d with respect to peak) of SN 2012hn show a series of absorption lines which are unique and a red continuum that is likely intrinsic rather than due to extinction. Lines of Ti II and Cr II are visible. Thismay be a temperature effect,which could also explain the red photospheric colour. A nebular spectrum at +150 d shows prominent Ca II, OI, CI and possibly MgI lines which appear similar in strength to those displayed by core-collapse supernovae (SNe). To add to the puzzle, SN 2012hn is located at a projected distance of 6 kpc from an E/S0 host and is not close to any obvious star-forming region. Overall SN 2012hn resembles a group of faint H-poor SNe that have been discovered recently and for which a convincing and consistent physical explanation is still missing. They all appear to explode preferentially in remote locations offset from a massive host galaxy with deep limits on any dwarf host galaxies, favouring old progenitor systems. SN 2012hn adds heterogeneity to this sample of objects.We discuss potential explosion channels including He-shell detonations and double detonations of white dwarfs as well as peculiar core-collapse SNe.",
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Valenti, S, Yuan, F, Taubenberger, S, Maguire, K, Pastorello, A, Benetti, S, Smartt, SJ, Cappellaro, E, Howell, DA, Bildsten, L, Moore, K, Stritzinger, M, Anderson, JP, Benitez-Herrera, S, Bufano, F, Gonzalez-Gaitan, S, McCrum, MG, Pignata, G, Fraser, M, Gal-Yam, A, Le Guillou, L, Inserra, C, Reichart, DE, Scalzo, R, Sullivan, M, Yaron, O & Young, DR 2013, 'PESSTO monitoring of SN 2012hn: Further heterogeneity among faint type I supernovae', Monthly Notices of the Royal Astronomical Society, vol. 437, n.º 2, stt1983, pp. 1519-1533. https://doi.org/10.1093/mnras/stt1983

PESSTO monitoring of SN 2012hn : Further heterogeneity among faint type I supernovae. / Valenti, S.; Yuan, F.; Taubenberger, S.; Maguire, K.; Pastorello, A.; Benetti, S.; Smartt, S. J.; Cappellaro, E.; Howell, D. A.; Bildsten, L.; Moore, K.; Stritzinger, M.; Anderson, J. P.; Benitez-Herrera, S.; Bufano, F.; Gonzalez-Gaitan, S.; McCrum, M. G.; Pignata, G.; Fraser, M.; Gal-Yam, A.; Le Guillou, L.; Inserra, C.; Reichart, D. E.; Scalzo, R.; Sullivan, M.; Yaron, O.; Young, D. R.

En: Monthly Notices of the Royal Astronomical Society, Vol. 437, N.º 2, stt1983, 01.11.2013, p. 1519-1533.

Resultado de la investigación: Article

TY - JOUR

T1 - PESSTO monitoring of SN 2012hn

T2 - Further heterogeneity among faint type I supernovae

AU - Valenti, S.

AU - Yuan, F.

AU - Taubenberger, S.

AU - Maguire, K.

AU - Pastorello, A.

AU - Benetti, S.

AU - Smartt, S. J.

AU - Cappellaro, E.

AU - Howell, D. A.

AU - Bildsten, L.

AU - Moore, K.

AU - Stritzinger, M.

AU - Anderson, J. P.

AU - Benitez-Herrera, S.

AU - Bufano, F.

AU - Gonzalez-Gaitan, S.

AU - McCrum, M. G.

AU - Pignata, G.

AU - Fraser, M.

AU - Gal-Yam, A.

AU - Le Guillou, L.

AU - Inserra, C.

AU - Reichart, D. E.

AU - Scalzo, R.

AU - Sullivan, M.

AU - Yaron, O.

AU - Young, D. R.

PY - 2013/11/1

Y1 - 2013/11/1

N2 - We present optical and infrared monitoring data of SN2012hn collected by the Public European Southern Observatory Spectroscopic Survey for Transient Objects. We show that SN 2012hn has a faint peak magnitude (MR ~ -15.65) and shows no hydrogen and no clear evidence for helium in its spectral evolution. Instead, we detect prominent Ca II lines at all epochs, which relates this transient to previously described 'Ca-rich' or 'gap' transients. However, the photospheric spectra (from -3 to +32 d with respect to peak) of SN 2012hn show a series of absorption lines which are unique and a red continuum that is likely intrinsic rather than due to extinction. Lines of Ti II and Cr II are visible. Thismay be a temperature effect,which could also explain the red photospheric colour. A nebular spectrum at +150 d shows prominent Ca II, OI, CI and possibly MgI lines which appear similar in strength to those displayed by core-collapse supernovae (SNe). To add to the puzzle, SN 2012hn is located at a projected distance of 6 kpc from an E/S0 host and is not close to any obvious star-forming region. Overall SN 2012hn resembles a group of faint H-poor SNe that have been discovered recently and for which a convincing and consistent physical explanation is still missing. They all appear to explode preferentially in remote locations offset from a massive host galaxy with deep limits on any dwarf host galaxies, favouring old progenitor systems. SN 2012hn adds heterogeneity to this sample of objects.We discuss potential explosion channels including He-shell detonations and double detonations of white dwarfs as well as peculiar core-collapse SNe.

AB - We present optical and infrared monitoring data of SN2012hn collected by the Public European Southern Observatory Spectroscopic Survey for Transient Objects. We show that SN 2012hn has a faint peak magnitude (MR ~ -15.65) and shows no hydrogen and no clear evidence for helium in its spectral evolution. Instead, we detect prominent Ca II lines at all epochs, which relates this transient to previously described 'Ca-rich' or 'gap' transients. However, the photospheric spectra (from -3 to +32 d with respect to peak) of SN 2012hn show a series of absorption lines which are unique and a red continuum that is likely intrinsic rather than due to extinction. Lines of Ti II and Cr II are visible. Thismay be a temperature effect,which could also explain the red photospheric colour. A nebular spectrum at +150 d shows prominent Ca II, OI, CI and possibly MgI lines which appear similar in strength to those displayed by core-collapse supernovae (SNe). To add to the puzzle, SN 2012hn is located at a projected distance of 6 kpc from an E/S0 host and is not close to any obvious star-forming region. Overall SN 2012hn resembles a group of faint H-poor SNe that have been discovered recently and for which a convincing and consistent physical explanation is still missing. They all appear to explode preferentially in remote locations offset from a massive host galaxy with deep limits on any dwarf host galaxies, favouring old progenitor systems. SN 2012hn adds heterogeneity to this sample of objects.We discuss potential explosion channels including He-shell detonations and double detonations of white dwarfs as well as peculiar core-collapse SNe.

KW - Supernovae:general

KW - Supernovae:individual:2012hn

UR - http://www.scopus.com/inward/record.url?scp=84890906404&partnerID=8YFLogxK

U2 - 10.1093/mnras/stt1983

DO - 10.1093/mnras/stt1983

M3 - Article

AN - SCOPUS:84890906404

VL - 437

SP - 1519

EP - 1533

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

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Valenti S, Yuan F, Taubenberger S, Maguire K, Pastorello A, Benetti S y otros. PESSTO monitoring of SN 2012hn: Further heterogeneity among faint type I supernovae. Monthly Notices of the Royal Astronomical Society. 2013 nov 1;437(2):1519-1533. stt1983. https://doi.org/10.1093/mnras/stt1983