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SN1991bg-like supernovae are associated with old stellar populations

  • Fiona H. Panther (a1) (a2) (a3), Ivo R. Seitenzahl (a1) (a2), Ashley J. Ruiter (a1) (a2) (a3), Roland M. Crocker (a2), Chris Lidman (a2) (a3), Ella Xi Wang (a2), Brad E. Tucker (a2) (a4) (a5) and Brent Groves (a2) (a4)...


SN1991bg-like supernovae are a distinct subclass of thermonuclear Type Ia supernovae (SNe Ia). Their spectral and photometric peculiarities indicate that their progenitors and explosion mechanisms differ from ‘normal’ SNe Ia. One method of determining information about supernova progenitors we cannot directly observe is to observe the stellar population adjacent to the apparent supernova explosion site to infer the distribution of stellar population ages and metallicities. We obtain integral field observations and analyse the spectra extracted from regions of projected radius $\sim\,\text{kpc}$ about the apparent SN explosion site for 11 91bg-like SNe in both early- and late-type galaxies. We utilise full-spectrum spectral fitting to determine the ages and metallicities of the stellar population within the aperture. We find that the majority of the stellar populations that hosted 91bg-like supernovae have little recent star formation. The ages of the stellar populations suggest that that 91bg-like SN progenitors explode after delay times of >6 Gyr, much longer than the typical delay time of normal SNe Ia, which peaks at $\sim$ 1 Gyr.


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Author for correspondence: Fiona H. Panther, E-mail:


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Blondin, S., Dessart, L., & Hillier, D. J. 2015, MNRAS, 448, 2766
Branch, D., & Tammann, G. A. 1992, ARA&A, 30, 359
Cappellari, M. 2017, MNRAS, 466, 798
Cappellari, M., & Emsellem, E. 2004, PASP, 116, 138
Childress, M. J., Vogt, F. P. A., Nielsen, J., & Sharp, R. G. 2014a, Ap&SS, 349, 617
Childress, M. J., Wolf, C., & Zahid, H. J. 2014b, MNRAS, 445, 1898
Crocker, R. M., et al. 2017, NA, 1, 0135 EP
de Vaucouleurs, G. 1959, Handbuch der Physik, 53, 275
Dopita, M., Hart, J., McGregor, P., Oates, P., Bloxham, G., & Jones, D. 2007, Ap&SS, 310, 255
Filippenko, A. V. 1997, ARA&A, 35, 309
Filippenko, A. V. et al. 1992, AJ, 104, 1543
Fitzpatrick, E. L. 1999, PASP, 111, 63
Fremling, C., et al. 2015, The Astronomer’s Telegram, 6909
Fujii, M. S., & Baba, J. 2012, MNRAS, 427, L16
Galbany, L., et al. 2014, A&A, 572, A38
Gallagher, J. S., Garnavich, P. M., Caldwell, N., Kirshner, R. P., Jha, S. W., Li, W., Ganeshalingam, M., & Filippenko, A. V. 2008, ApJ, 685, 752
Garnavich, P. M., et al. 2004, ApJ, 613, 1120
Hakobyan, A. A., et al. 2017, MNRAS, 471, 1390
Hillebrandt, W., Kromer, M., Röpke, F. K., & Ruiter, A. J. 2013, FP, 8, 116
Kasen, D. 2006, ApJ, 649, 939
Leibundgut, B. 2001, ARA&A, 39, 67
Li, W., et al. 2011, MNRAS, 412, 1441
Maguire, K. 2017, in Handbook of Supernovae (Springer) 293, doi:10.1007/978-3-319-21846-5_36
Maoz, D., & Mannucci, F. 2008, MNRAS, 388, 421
Maoz, D., Mannucci, F., & Brandt, T. D. 2012, MNRAS, 426, 3282
Moe, M., & Di Stefano, R. 2017, ApJS, 230, 15
Pakmor, R., Kromer, M., Röpke, F. K., Sim, S. A., Ruiter, A. J., & Hillebrandt, W. 2010, Nature, 463, 61
Pakmor, R., Kromer, M., Taubenberger, S., & Springel, V. 2013, ApJ, 770, L8
Pastorello, A., et al. 2012, The Astronomer’s Telegram, 4339
Perets, H. B., et al. 2010, Nature, 465, 322
Perlmutter, S., et al. 1999, ApJ, 517, 565
Phillips, M. M. 1993, ApJ, 413, L105
Riess, A. G., et al. 1998, AJ, 116, 1009
Rigault, M., et al. 2013, A&A, 560, A66
Rigault, M., et al. 2018, preprint arXiv:1806.03849
Sánchez-Blázquez, P., et al. 2006, MNRAS, 371, 703
Schlafly, E. F., & Finkbeiner, D. P. 2011, ApJ, 737, 103
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525
Shen, K. J., Toonen, S., & Graur, O. 2017, ApJ, 851, L50
Silverman, J. M., et al. 2012, MNRAS, 425, 1789
Stanishev, V., Rodrigues, M., Mourão, A., & Flores, H. 2012, A&A, 545, A58
Stanway, E. R., & Eldridge, J. J. 2018, MNRAS, 479, 75
Stanway, E. R., Eldridge, J. J., & Becker, G. D. 2016, MNRAS, 456, 485
Sullivan, M., et al. 2011, ApJ, 732, 118
Taubenberger, S. 2017, in Handbook of Supernovae (Springer), 317, doi:10.1007/978-3-319-21846-5_37
Taubenberger, S., et al. 2008, MNRAS, 385, 75
Tripp, R. 1998, A&A, 331, 815
Vazdekis, A., Sánchez-Blázquez, P., Falcón-Barroso, J., Cenarro, A. J., Beasley, M. A., Cardiel, N., Gorgas, J., & Peletier, R. F. 2010, MNRAS, 404, 1639
Worthey, G. 1994, ApJS, 95, 107
Worthey, G., & Ottaviani, D. L., 1997, ApJS, 111, 377


SN1991bg-like supernovae are associated with old stellar populations

  • Fiona H. Panther (a1) (a2) (a3), Ivo R. Seitenzahl (a1) (a2), Ashley J. Ruiter (a1) (a2) (a3), Roland M. Crocker (a2), Chris Lidman (a2) (a3), Ella Xi Wang (a2), Brad E. Tucker (a2) (a4) (a5) and Brent Groves (a2) (a4)...


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