Spectroscopic observations of sn 2012fr: A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau

M. J. Childress, R. A. Scalzo, S. A. Sim, B. E. Tucker, F. Yuan, B. P. Schmidt, S. B. Cenko, J. M. Silverman, C. Contreras, E. Y. Hsiao, M. Phillips, N. Morrell, S. W. Jha, C. McCully, A. V. Filippenko, J. P. Anderson, S. Benetti, F. Bufano, T. De Jaeger, F. ForsterA. Gal-Yam, L. Le Guillou, K. Maguire, J. Maund, P. A. Mazzali, G. Pignata, S. Smartt, J. Spyromilio, M. Sullivan, F. Taddia, S. Valenti, D. D.R. Bayliss, M. Bessell, G. A. Blanc, D. J. Carson, K. I. Clubb, C. De Burgh-Day, T. D. Desjardins, J. J. Fang, O. D. Fox, E. L. Gates, I. T. Ho, S. Keller, P. L. Kelly, C. Lidman, N. S. Loaring, J. R. Mould, M. Owers, S. Ozbilgen, L. Pei, T. Pickering, M. B. Pracy, J. A. Rich, B. E. Schaefer, N. Scott, M. Stritzinger, F. P.A. Vogt, G. Zhou

Resultado de la investigación: Article

42 Citas (Scopus)

Resumen

We present 65 optical spectra of the Type Ia SN 2012fr, 33 of which were obtained before maximum light. At early times, SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si II λ6355 line that can be cleanly decoupled from the lower velocity "photospheric" component. This Si II λ6355 HVF fades by phase -5; subsequently, the photospheric component exhibits a very narrow velocity width and remains at a nearly constant velocity of 12,000 km s-1 until at least five weeks after maximum brightness. The Ca II infrared triplet exhibits similar evidence for both a photospheric component at v 12,000 km s-1 with narrow line width and long velocity plateau, as well as an HVF beginning at v 31,000 km s-1 two weeks before maximum. SN 2012fr resides on the border between the "shallow silicon" and "core-normal" subclasses in the Branch et al. classification scheme, and on the border between normal and high-velocity Type Ia supernovae (SNe Ia) in the Wang et al. system. Though it is a clear member of the "low velocity gradient" group of SNe Ia and exhibits a very slow light-curve decline, it shows key dissimilarities with the overluminous SN 1991T or SN 1999aa subclasses of SNe Ia. SN 2012fr represents a well-observed SN Ia at the luminous end of the normal SN Ia distribution and a key transitional event between nominal spectroscopic subclasses of SNe Ia.

Idioma originalEnglish
Número de artículo29
PublicaciónAstrophysical Journal
Volumen770
N.º1
DOI
EstadoPublished - 10 jun 2013

Huella dactilar

supernovae
plateaus
plateau
borders
low speed
light curve
optical spectrum
brightness
silicon
gradients

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Childress, M. J. ; Scalzo, R. A. ; Sim, S. A. ; Tucker, B. E. ; Yuan, F. ; Schmidt, B. P. ; Cenko, S. B. ; Silverman, J. M. ; Contreras, C. ; Hsiao, E. Y. ; Phillips, M. ; Morrell, N. ; Jha, S. W. ; McCully, C. ; Filippenko, A. V. ; Anderson, J. P. ; Benetti, S. ; Bufano, F. ; De Jaeger, T. ; Forster, F. ; Gal-Yam, A. ; Le Guillou, L. ; Maguire, K. ; Maund, J. ; Mazzali, P. A. ; Pignata, G. ; Smartt, S. ; Spyromilio, J. ; Sullivan, M. ; Taddia, F. ; Valenti, S. ; Bayliss, D. D.R. ; Bessell, M. ; Blanc, G. A. ; Carson, D. J. ; Clubb, K. I. ; De Burgh-Day, C. ; Desjardins, T. D. ; Fang, J. J. ; Fox, O. D. ; Gates, E. L. ; Ho, I. T. ; Keller, S. ; Kelly, P. L. ; Lidman, C. ; Loaring, N. S. ; Mould, J. R. ; Owers, M. ; Ozbilgen, S. ; Pei, L. ; Pickering, T. ; Pracy, M. B. ; Rich, J. A. ; Schaefer, B. E. ; Scott, N. ; Stritzinger, M. ; Vogt, F. P.A. ; Zhou, G. / Spectroscopic observations of sn 2012fr : A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau. En: Astrophysical Journal. 2013 ; Vol. 770, N.º 1.
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title = "Spectroscopic observations of sn 2012fr: A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau",
abstract = "We present 65 optical spectra of the Type Ia SN 2012fr, 33 of which were obtained before maximum light. At early times, SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si II λ6355 line that can be cleanly decoupled from the lower velocity {"}photospheric{"} component. This Si II λ6355 HVF fades by phase -5; subsequently, the photospheric component exhibits a very narrow velocity width and remains at a nearly constant velocity of 12,000 km s-1 until at least five weeks after maximum brightness. The Ca II infrared triplet exhibits similar evidence for both a photospheric component at v 12,000 km s-1 with narrow line width and long velocity plateau, as well as an HVF beginning at v 31,000 km s-1 two weeks before maximum. SN 2012fr resides on the border between the {"}shallow silicon{"} and {"}core-normal{"} subclasses in the Branch et al. classification scheme, and on the border between normal and high-velocity Type Ia supernovae (SNe Ia) in the Wang et al. system. Though it is a clear member of the {"}low velocity gradient{"} group of SNe Ia and exhibits a very slow light-curve decline, it shows key dissimilarities with the overluminous SN 1991T or SN 1999aa subclasses of SNe Ia. SN 2012fr represents a well-observed SN Ia at the luminous end of the normal SN Ia distribution and a key transitional event between nominal spectroscopic subclasses of SNe Ia.",
keywords = "galaxies: individual (NGC 1365), supernovae: general, supernovae: individual (SN 2012fr)",
author = "Childress, {M. J.} and Scalzo, {R. A.} and Sim, {S. A.} and Tucker, {B. E.} and F. Yuan and Schmidt, {B. P.} and Cenko, {S. B.} and Silverman, {J. M.} and C. Contreras and Hsiao, {E. Y.} and M. Phillips and N. Morrell and Jha, {S. W.} and C. McCully and Filippenko, {A. V.} and Anderson, {J. P.} and S. Benetti and F. Bufano and {De Jaeger}, T. and F. Forster and A. Gal-Yam and {Le Guillou}, L. and K. Maguire and J. Maund and Mazzali, {P. A.} and G. Pignata and S. Smartt and J. Spyromilio and M. Sullivan and F. Taddia and S. Valenti and Bayliss, {D. D.R.} and M. Bessell and Blanc, {G. A.} and Carson, {D. J.} and Clubb, {K. I.} and {De Burgh-Day}, C. and Desjardins, {T. D.} and Fang, {J. J.} and Fox, {O. D.} and Gates, {E. L.} and Ho, {I. T.} and S. Keller and Kelly, {P. L.} and C. Lidman and Loaring, {N. S.} and Mould, {J. R.} and M. Owers and S. Ozbilgen and L. Pei and T. Pickering and Pracy, {M. B.} and Rich, {J. A.} and Schaefer, {B. E.} and N. Scott and M. Stritzinger and Vogt, {F. P.A.} and G. Zhou",
year = "2013",
month = "6",
day = "10",
doi = "10.1088/0004-637X/770/1/29",
language = "English",
volume = "770",
journal = "Astrophysical Journal",
issn = "0004-637X",
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Childress, MJ, Scalzo, RA, Sim, SA, Tucker, BE, Yuan, F, Schmidt, BP, Cenko, SB, Silverman, JM, Contreras, C, Hsiao, EY, Phillips, M, Morrell, N, Jha, SW, McCully, C, Filippenko, AV, Anderson, JP, Benetti, S, Bufano, F, De Jaeger, T, Forster, F, Gal-Yam, A, Le Guillou, L, Maguire, K, Maund, J, Mazzali, PA, Pignata, G, Smartt, S, Spyromilio, J, Sullivan, M, Taddia, F, Valenti, S, Bayliss, DDR, Bessell, M, Blanc, GA, Carson, DJ, Clubb, KI, De Burgh-Day, C, Desjardins, TD, Fang, JJ, Fox, OD, Gates, EL, Ho, IT, Keller, S, Kelly, PL, Lidman, C, Loaring, NS, Mould, JR, Owers, M, Ozbilgen, S, Pei, L, Pickering, T, Pracy, MB, Rich, JA, Schaefer, BE, Scott, N, Stritzinger, M, Vogt, FPA & Zhou, G 2013, 'Spectroscopic observations of sn 2012fr: A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau', Astrophysical Journal, vol. 770, n.º 1, 29. https://doi.org/10.1088/0004-637X/770/1/29

Spectroscopic observations of sn 2012fr : A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau. / Childress, M. J.; Scalzo, R. A.; Sim, S. A.; Tucker, B. E.; Yuan, F.; Schmidt, B. P.; Cenko, S. B.; Silverman, J. M.; Contreras, C.; Hsiao, E. Y.; Phillips, M.; Morrell, N.; Jha, S. W.; McCully, C.; Filippenko, A. V.; Anderson, J. P.; Benetti, S.; Bufano, F.; De Jaeger, T.; Forster, F.; Gal-Yam, A.; Le Guillou, L.; Maguire, K.; Maund, J.; Mazzali, P. A.; Pignata, G.; Smartt, S.; Spyromilio, J.; Sullivan, M.; Taddia, F.; Valenti, S.; Bayliss, D. D.R.; Bessell, M.; Blanc, G. A.; Carson, D. J.; Clubb, K. I.; De Burgh-Day, C.; Desjardins, T. D.; Fang, J. J.; Fox, O. D.; Gates, E. L.; Ho, I. T.; Keller, S.; Kelly, P. L.; Lidman, C.; Loaring, N. S.; Mould, J. R.; Owers, M.; Ozbilgen, S.; Pei, L.; Pickering, T.; Pracy, M. B.; Rich, J. A.; Schaefer, B. E.; Scott, N.; Stritzinger, M.; Vogt, F. P.A.; Zhou, G.

En: Astrophysical Journal, Vol. 770, N.º 1, 29, 10.06.2013.

Resultado de la investigación: Article

TY - JOUR

T1 - Spectroscopic observations of sn 2012fr

T2 - A luminous, normal type ia supernova with early high-velocity features and a late velocity plateau

AU - Childress, M. J.

AU - Scalzo, R. A.

AU - Sim, S. A.

AU - Tucker, B. E.

AU - Yuan, F.

AU - Schmidt, B. P.

AU - Cenko, S. B.

AU - Silverman, J. M.

AU - Contreras, C.

AU - Hsiao, E. Y.

AU - Phillips, M.

AU - Morrell, N.

AU - Jha, S. W.

AU - McCully, C.

AU - Filippenko, A. V.

AU - Anderson, J. P.

AU - Benetti, S.

AU - Bufano, F.

AU - De Jaeger, T.

AU - Forster, F.

AU - Gal-Yam, A.

AU - Le Guillou, L.

AU - Maguire, K.

AU - Maund, J.

AU - Mazzali, P. A.

AU - Pignata, G.

AU - Smartt, S.

AU - Spyromilio, J.

AU - Sullivan, M.

AU - Taddia, F.

AU - Valenti, S.

AU - Bayliss, D. D.R.

AU - Bessell, M.

AU - Blanc, G. A.

AU - Carson, D. J.

AU - Clubb, K. I.

AU - De Burgh-Day, C.

AU - Desjardins, T. D.

AU - Fang, J. J.

AU - Fox, O. D.

AU - Gates, E. L.

AU - Ho, I. T.

AU - Keller, S.

AU - Kelly, P. L.

AU - Lidman, C.

AU - Loaring, N. S.

AU - Mould, J. R.

AU - Owers, M.

AU - Ozbilgen, S.

AU - Pei, L.

AU - Pickering, T.

AU - Pracy, M. B.

AU - Rich, J. A.

AU - Schaefer, B. E.

AU - Scott, N.

AU - Stritzinger, M.

AU - Vogt, F. P.A.

AU - Zhou, G.

PY - 2013/6/10

Y1 - 2013/6/10

N2 - We present 65 optical spectra of the Type Ia SN 2012fr, 33 of which were obtained before maximum light. At early times, SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si II λ6355 line that can be cleanly decoupled from the lower velocity "photospheric" component. This Si II λ6355 HVF fades by phase -5; subsequently, the photospheric component exhibits a very narrow velocity width and remains at a nearly constant velocity of 12,000 km s-1 until at least five weeks after maximum brightness. The Ca II infrared triplet exhibits similar evidence for both a photospheric component at v 12,000 km s-1 with narrow line width and long velocity plateau, as well as an HVF beginning at v 31,000 km s-1 two weeks before maximum. SN 2012fr resides on the border between the "shallow silicon" and "core-normal" subclasses in the Branch et al. classification scheme, and on the border between normal and high-velocity Type Ia supernovae (SNe Ia) in the Wang et al. system. Though it is a clear member of the "low velocity gradient" group of SNe Ia and exhibits a very slow light-curve decline, it shows key dissimilarities with the overluminous SN 1991T or SN 1999aa subclasses of SNe Ia. SN 2012fr represents a well-observed SN Ia at the luminous end of the normal SN Ia distribution and a key transitional event between nominal spectroscopic subclasses of SNe Ia.

AB - We present 65 optical spectra of the Type Ia SN 2012fr, 33 of which were obtained before maximum light. At early times, SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si II λ6355 line that can be cleanly decoupled from the lower velocity "photospheric" component. This Si II λ6355 HVF fades by phase -5; subsequently, the photospheric component exhibits a very narrow velocity width and remains at a nearly constant velocity of 12,000 km s-1 until at least five weeks after maximum brightness. The Ca II infrared triplet exhibits similar evidence for both a photospheric component at v 12,000 km s-1 with narrow line width and long velocity plateau, as well as an HVF beginning at v 31,000 km s-1 two weeks before maximum. SN 2012fr resides on the border between the "shallow silicon" and "core-normal" subclasses in the Branch et al. classification scheme, and on the border between normal and high-velocity Type Ia supernovae (SNe Ia) in the Wang et al. system. Though it is a clear member of the "low velocity gradient" group of SNe Ia and exhibits a very slow light-curve decline, it shows key dissimilarities with the overluminous SN 1991T or SN 1999aa subclasses of SNe Ia. SN 2012fr represents a well-observed SN Ia at the luminous end of the normal SN Ia distribution and a key transitional event between nominal spectroscopic subclasses of SNe Ia.

KW - galaxies: individual (NGC 1365)

KW - supernovae: general

KW - supernovae: individual (SN 2012fr)

UR - http://www.scopus.com/inward/record.url?scp=84878291924&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/770/1/29

DO - 10.1088/0004-637X/770/1/29

M3 - Article

AN - SCOPUS:84878291924

VL - 770

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 29

ER -