A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Supernovae 2016bdu and 2005gl, and their link with SN 2009ip-like transients: another piece of the puzzle
Tekijät: Pastorello A., Kochanek C. S., Fraser M., Dong Subo, Elias-Rosa N., Filippenko A. V., Benetti S., Cappellaro E., Tomasella L., Drake A. J., Harmanen J., Reynolds T., Shappee B. J., Smartt S. J., Chambers K. C., Huber M. E., Smith K., Stanek K. Z., Christensen E. J., Denneau L., Djorgovski S. G., Flewelling H., Gall C., Gal-Yam A., Geier S., Heinze A., Holoien T. W.-S., Isern J., Kangas T., Kankare E., Koff R. A., Llapasset J.-M., Lowe T. B., Lundqvist P., Magnier E. A., Mattila S., Morales-Garoffolo A., Mutel R., Nicolas J., Ochner P., Ofek E. O., Prosperi E., Rest A., Sano Y., Stalder B., Stritzinger M. D., Taddia F., Terreran G., Tonry J. L., Wainscoat R. J., Waters C., Weiland H., Willman M., Young D. R., Zheng W.
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2018
Journal: Monthly Notices of the Royal Astronomical Society
Vuosikerta: 474
Numero: 1
Aloitussivu: 197
Lopetussivu: 218
Sivujen määrä: 22
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stx2668
Rinnakkaistallenteen osoite: https://arxiv.org/abs/1707.00611
Supernova (SN) 2016bdu is an unusual transient resembling SN 2009ip. SN
2009ip-like events are characterized by a long-lasting phase of erratic
variability which ends with two luminous outbursts a few weeks apart.
The second outburst is significantly more luminous (about 3 mag) than
the first. In the case of SN 2016bdu, the first outburst (Event A)
reached an absolute magnitude M(r) ~ -15.3 mag, while the second one
(Event B) occurred over one month later and reached M(r) ~ -18 mag. By
inspecting archival data, a faint source at the position of SN 2016bdu
is detectable several times in the past few years. We interpret these
detections as signatures of a phase of erratic variability, similar to
that experienced by SN 2009ip between 2008 and mid-2012, and resembling
the currently observed variability of the luminous blue variable SN
2000ch in NGC 3432. Spectroscopic monitoring of SN 2016bdu during the
second peak initially shows features typical of a SN IIn. One month
after the Event B maximum, the spectra develop broad Balmer lines with P
Cygni profiles and broad metal features. At these late phases, the
spectra resemble those of a typical Type II SN. All members of this SN
2009ip-like group are remarkably similar to the Type IIn SN 2005gl. For
this object, the claim of a terminal SN explosion is supported by the
disappearance of the progenitor star. The similarity with SN 2005gl
suggests that all members of this family may finally explode as genuine
SNe, although the unequivocal detection of nucleosynthesised elements in
their nebular spectra is still missing.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
