The rise-time of Type II supernovae

S. González-Gaitán, N. Tominaga, J. Molina, L. Galbany, F. Bufano, J. P. Anderson, C. Gutierrez, F. Förster, G. Pignata, M. Bersten, D. A. Howell, M. Sullivan, R. Carlberg, T. De Jaeger, M. Hamuy, P. V. Baklanov, S. I. Blinnikov

Resultado de la investigación: Article

52 Citas (Scopus)

Resumen

We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections prior to explosion, we constrain risetimes, i.e. the durations from estimated first to maximum light, as a function of effective wavelength. At rest-frame g' band (λeff = 4722 Å), we find a distribution of fast rise-times with median of (7.5 ± 0.3) d. Comparing these durations with analytical shock models of Rabinak &Waxman and Nakar & Sari, and hydrodynamical models of Tominaga et al., which are mostly sensitive to progenitor radius at these epochs, we find a median characteristic radius of less than 400 solar radii. The inferred radii are on average much smaller than the radii obtained for observed red supergiants (RSG). Investigating the post-maximum slopes as a function of effective wavelength in the light of theoretical models, we find that massive hydrogen envelopes are still needed to explain the plateaus of SNe II. We therefore argue that the SN II rise-times we observe are either (a) the shock cooling resulting from the core collapse of RSG with small and dense envelopes, or (b) the delayed and prolonged shock breakout of the collapse of an RSG with an extended atmosphere or embedded within pre-SN circumstellar material.

Idioma originalEnglish
Páginas (desde-hasta)2212-2229
Número de páginas18
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen451
N.º2
DOI
EstadoPublished - 1 may 2015

Huella dactilar

supernovae
radii
shock
wavelength
envelopes
explosion
plateau
hydrogen
cooling
atmosphere
wavelengths
light curve
explosions
plateaus
time measurement
slopes
atmospheres
distribution
material

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

González-Gaitán, S., Tominaga, N., Molina, J., Galbany, L., Bufano, F., Anderson, J. P., ... Blinnikov, S. I. (2015). The rise-time of Type II supernovae. Monthly Notices of the Royal Astronomical Society, 451(2), 2212-2229. https://doi.org/10.1093/mnras/stv1097
González-Gaitán, S. ; Tominaga, N. ; Molina, J. ; Galbany, L. ; Bufano, F. ; Anderson, J. P. ; Gutierrez, C. ; Förster, F. ; Pignata, G. ; Bersten, M. ; Howell, D. A. ; Sullivan, M. ; Carlberg, R. ; De Jaeger, T. ; Hamuy, M. ; Baklanov, P. V. ; Blinnikov, S. I. / The rise-time of Type II supernovae. En: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 451, N.º 2. pp. 2212-2229.
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abstract = "We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections prior to explosion, we constrain risetimes, i.e. the durations from estimated first to maximum light, as a function of effective wavelength. At rest-frame g' band (λeff = 4722 {\AA}), we find a distribution of fast rise-times with median of (7.5 ± 0.3) d. Comparing these durations with analytical shock models of Rabinak &Waxman and Nakar & Sari, and hydrodynamical models of Tominaga et al., which are mostly sensitive to progenitor radius at these epochs, we find a median characteristic radius of less than 400 solar radii. The inferred radii are on average much smaller than the radii obtained for observed red supergiants (RSG). Investigating the post-maximum slopes as a function of effective wavelength in the light of theoretical models, we find that massive hydrogen envelopes are still needed to explain the plateaus of SNe II. We therefore argue that the SN II rise-times we observe are either (a) the shock cooling resulting from the core collapse of RSG with small and dense envelopes, or (b) the delayed and prolonged shock breakout of the collapse of an RSG with an extended atmosphere or embedded within pre-SN circumstellar material.",
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González-Gaitán, S, Tominaga, N, Molina, J, Galbany, L, Bufano, F, Anderson, JP, Gutierrez, C, Förster, F, Pignata, G, Bersten, M, Howell, DA, Sullivan, M, Carlberg, R, De Jaeger, T, Hamuy, M, Baklanov, PV & Blinnikov, SI 2015, 'The rise-time of Type II supernovae', Monthly Notices of the Royal Astronomical Society, vol. 451, n.º 2, pp. 2212-2229. https://doi.org/10.1093/mnras/stv1097

The rise-time of Type II supernovae. / González-Gaitán, S.; Tominaga, N.; Molina, J.; Galbany, L.; Bufano, F.; Anderson, J. P.; Gutierrez, C.; Förster, F.; Pignata, G.; Bersten, M.; Howell, D. A.; Sullivan, M.; Carlberg, R.; De Jaeger, T.; Hamuy, M.; Baklanov, P. V.; Blinnikov, S. I.

En: Monthly Notices of the Royal Astronomical Society, Vol. 451, N.º 2, 01.05.2015, p. 2212-2229.

Resultado de la investigación: Article

TY - JOUR

T1 - The rise-time of Type II supernovae

AU - González-Gaitán, S.

AU - Tominaga, N.

AU - Molina, J.

AU - Galbany, L.

AU - Bufano, F.

AU - Anderson, J. P.

AU - Gutierrez, C.

AU - Förster, F.

AU - Pignata, G.

AU - Bersten, M.

AU - Howell, D. A.

AU - Sullivan, M.

AU - Carlberg, R.

AU - De Jaeger, T.

AU - Hamuy, M.

AU - Baklanov, P. V.

AU - Blinnikov, S. I.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections prior to explosion, we constrain risetimes, i.e. the durations from estimated first to maximum light, as a function of effective wavelength. At rest-frame g' band (λeff = 4722 Å), we find a distribution of fast rise-times with median of (7.5 ± 0.3) d. Comparing these durations with analytical shock models of Rabinak &Waxman and Nakar & Sari, and hydrodynamical models of Tominaga et al., which are mostly sensitive to progenitor radius at these epochs, we find a median characteristic radius of less than 400 solar radii. The inferred radii are on average much smaller than the radii obtained for observed red supergiants (RSG). Investigating the post-maximum slopes as a function of effective wavelength in the light of theoretical models, we find that massive hydrogen envelopes are still needed to explain the plateaus of SNe II. We therefore argue that the SN II rise-times we observe are either (a) the shock cooling resulting from the core collapse of RSG with small and dense envelopes, or (b) the delayed and prolonged shock breakout of the collapse of an RSG with an extended atmosphere or embedded within pre-SN circumstellar material.

AB - We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections prior to explosion, we constrain risetimes, i.e. the durations from estimated first to maximum light, as a function of effective wavelength. At rest-frame g' band (λeff = 4722 Å), we find a distribution of fast rise-times with median of (7.5 ± 0.3) d. Comparing these durations with analytical shock models of Rabinak &Waxman and Nakar & Sari, and hydrodynamical models of Tominaga et al., which are mostly sensitive to progenitor radius at these epochs, we find a median characteristic radius of less than 400 solar radii. The inferred radii are on average much smaller than the radii obtained for observed red supergiants (RSG). Investigating the post-maximum slopes as a function of effective wavelength in the light of theoretical models, we find that massive hydrogen envelopes are still needed to explain the plateaus of SNe II. We therefore argue that the SN II rise-times we observe are either (a) the shock cooling resulting from the core collapse of RSG with small and dense envelopes, or (b) the delayed and prolonged shock breakout of the collapse of an RSG with an extended atmosphere or embedded within pre-SN circumstellar material.

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KW - Supernoave: general

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DO - 10.1093/mnras/stv1097

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

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González-Gaitán S, Tominaga N, Molina J, Galbany L, Bufano F, Anderson JP y otros. The rise-time of Type II supernovae. Monthly Notices of the Royal Astronomical Society. 2015 may 1;451(2):2212-2229. https://doi.org/10.1093/mnras/stv1097