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Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory

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Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory. / Maguire, K.; Sullivan, M.; Pan, Y. -C. et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 444, No. 4, 11.11.2014, p. 3258-3274.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Maguire, K, Sullivan, M, Pan, Y-C, Gal-Yam, A, Hook, IM, Howell, DA, Nugent, PE, Mazzali, P, Chotard, N, Clubb, KI, Filippenko, AV, Kasliwal, MM, Kandrashoff, MT, Poznanski, D, Saunders, CM, Silverman, JM, Walker, E & Xu, D 2014, 'Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory', Monthly Notices of the Royal Astronomical Society, vol. 444, no. 4, pp. 3258-3274. https://doi.org/10.1093/mnras/stu1607

APA

Maguire, K., Sullivan, M., Pan, Y. .-C., Gal-Yam, A., Hook, I. M., Howell, D. A., Nugent, P. E., Mazzali, P., Chotard, N., Clubb, K. I., Filippenko, A. V., Kasliwal, M. M., Kandrashoff, M. T., Poznanski, D., Saunders, C. M., Silverman, J. M., Walker, E., & Xu, D. (2014). Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory. Monthly Notices of the Royal Astronomical Society, 444(4), 3258-3274. https://doi.org/10.1093/mnras/stu1607

Vancouver

Maguire K, Sullivan M, Pan YC, Gal-Yam A, Hook IM, Howell DA et al. Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory. Monthly Notices of the Royal Astronomical Society. 2014 Nov 11;444(4):3258-3274. Epub 2014 Sept 15. doi: 10.1093/mnras/stu1607

Author

Maguire, K. ; Sullivan, M. ; Pan, Y. -C. et al. / Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory. In: Monthly Notices of the Royal Astronomical Society. 2014 ; Vol. 444, No. 4. pp. 3258-3274.

Bibtex

@article{e5b6b37c09b2412eb3b940ed11977db6,
title = "Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory",
abstract = "We present an investigation of the optical spectra of 264 low-redshift (z <0.2) Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory, an untargeted transient survey. We focus on velocity and pseudo-equivalent width measurements of the Si II 4130, 5972, and 6355 angstrom lines, as well those of the Ca II near-infrared (NIR) triplet, up to +5 days relative to the SN B-band maximum light. We find that a high-velocity component of the Ca II NIR triplet is needed to explain the spectrum in similar to 95 per cent of SNe Ia observed before-5 days, decreasing to similar to 80 per cent at maximum. The average velocity of the Ca II high-velocity component is similar to 8500 km s(-1) higher than the photospheric component. We confirm previous results that SNe Ia around maximum light with a larger contribution from the high-velocity component relative to the photospheric component in their Ca II NIR feature have, on average, broader light curves and lower Ca II NIR photospheric velocities. We find that these relations are driven by both a stronger high-velocity component and a weaker contribution from the photospheric Ca II NIR component in broader light curve SNe Ia. We identify the presence of C II in very-early-time SN Ia spectra (before - 10 days), finding that >40 per cent of SNe Ia observed at these phases show signs of unburnt material in their spectra, and that C II features are more likely to be found in SNe Ia having narrower light curves.",
keywords = "supernovae: general, galaxies: general, distance scale, HUBBLE-SPACE-TELESCOPE, HIGH-VELOCITY FEATURES, DELAYED-DETONATION MODELS, TIME OPTICAL-SPECTRA, DIGITAL SKY SURVEY, WHITE-DWARF STAR, LEGACY SURVEY, DARK-ENERGY, SN 2011FE, CIRCUMSTELLAR MATERIAL",
author = "K. Maguire and M. Sullivan and Pan, {Y. -C.} and A. Gal-Yam and Hook, {I. M.} and Howell, {D. A.} and Nugent, {P. E.} and P. Mazzali and N. Chotard and Clubb, {K. I.} and Filippenko, {A. V.} and Kasliwal, {M. M.} and Kandrashoff, {M. T.} and D. Poznanski and Saunders, {C. M.} and Silverman, {J. M.} and E. Walker and D. Xu",
year = "2014",
month = nov,
day = "11",
doi = "10.1093/mnras/stu1607",
language = "English",
volume = "444",
pages = "3258--3274",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "4",

}

RIS

TY - JOUR

T1 - Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory

AU - Maguire, K.

AU - Sullivan, M.

AU - Pan, Y. -C.

AU - Gal-Yam, A.

AU - Hook, I. M.

AU - Howell, D. A.

AU - Nugent, P. E.

AU - Mazzali, P.

AU - Chotard, N.

AU - Clubb, K. I.

AU - Filippenko, A. V.

AU - Kasliwal, M. M.

AU - Kandrashoff, M. T.

AU - Poznanski, D.

AU - Saunders, C. M.

AU - Silverman, J. M.

AU - Walker, E.

AU - Xu, D.

PY - 2014/11/11

Y1 - 2014/11/11

N2 - We present an investigation of the optical spectra of 264 low-redshift (z <0.2) Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory, an untargeted transient survey. We focus on velocity and pseudo-equivalent width measurements of the Si II 4130, 5972, and 6355 angstrom lines, as well those of the Ca II near-infrared (NIR) triplet, up to +5 days relative to the SN B-band maximum light. We find that a high-velocity component of the Ca II NIR triplet is needed to explain the spectrum in similar to 95 per cent of SNe Ia observed before-5 days, decreasing to similar to 80 per cent at maximum. The average velocity of the Ca II high-velocity component is similar to 8500 km s(-1) higher than the photospheric component. We confirm previous results that SNe Ia around maximum light with a larger contribution from the high-velocity component relative to the photospheric component in their Ca II NIR feature have, on average, broader light curves and lower Ca II NIR photospheric velocities. We find that these relations are driven by both a stronger high-velocity component and a weaker contribution from the photospheric Ca II NIR component in broader light curve SNe Ia. We identify the presence of C II in very-early-time SN Ia spectra (before - 10 days), finding that >40 per cent of SNe Ia observed at these phases show signs of unburnt material in their spectra, and that C II features are more likely to be found in SNe Ia having narrower light curves.

AB - We present an investigation of the optical spectra of 264 low-redshift (z <0.2) Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory, an untargeted transient survey. We focus on velocity and pseudo-equivalent width measurements of the Si II 4130, 5972, and 6355 angstrom lines, as well those of the Ca II near-infrared (NIR) triplet, up to +5 days relative to the SN B-band maximum light. We find that a high-velocity component of the Ca II NIR triplet is needed to explain the spectrum in similar to 95 per cent of SNe Ia observed before-5 days, decreasing to similar to 80 per cent at maximum. The average velocity of the Ca II high-velocity component is similar to 8500 km s(-1) higher than the photospheric component. We confirm previous results that SNe Ia around maximum light with a larger contribution from the high-velocity component relative to the photospheric component in their Ca II NIR feature have, on average, broader light curves and lower Ca II NIR photospheric velocities. We find that these relations are driven by both a stronger high-velocity component and a weaker contribution from the photospheric Ca II NIR component in broader light curve SNe Ia. We identify the presence of C II in very-early-time SN Ia spectra (before - 10 days), finding that >40 per cent of SNe Ia observed at these phases show signs of unburnt material in their spectra, and that C II features are more likely to be found in SNe Ia having narrower light curves.

KW - supernovae: general

KW - galaxies: general

KW - distance scale

KW - HUBBLE-SPACE-TELESCOPE

KW - HIGH-VELOCITY FEATURES

KW - DELAYED-DETONATION MODELS

KW - TIME OPTICAL-SPECTRA

KW - DIGITAL SKY SURVEY

KW - WHITE-DWARF STAR

KW - LEGACY SURVEY

KW - DARK-ENERGY

KW - SN 2011FE

KW - CIRCUMSTELLAR MATERIAL

U2 - 10.1093/mnras/stu1607

DO - 10.1093/mnras/stu1607

M3 - Journal article

VL - 444

SP - 3258

EP - 3274

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -