تقرير
The Old Host-Galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational Wave Source
العنوان: | The Old Host-Galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational Wave Source |
---|---|
المؤلفون: | Pan, Y. -C., Kilpatrick, C. D., Simon, J. D., Xhakaj, E., Boutsia, K., Coulter, D. A., Drout, M. R., Foley, R. J., Kasen, D., Morrell, N., Murguia-Berthier, A., Osip, D., Piro, A. L., Prochaska, J. X., Ramirez-Ruiz, E., Rest, A., Rojas-Bravo, C., Shappee, B. J., Siebert, M. R. |
سنة النشر: | 2017 |
المجموعة: | Astrophysics |
مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
الوصف: | We present an analysis of the host-galaxy environment of Swope Supernova Survey 2017a (SSS17a), the discovery of an electromagnetic counterpart to a gravitational wave source, GW170817. SSS17a occurred 1.9 kpc (in projection; 10.2") from the nucleus of NGC 4993, an S0 galaxy at a distance of 40 Mpc. We present a Hubble Space Telescope (HST) pre-trigger image of NGC 4993, Magellan optical spectroscopy of the nucleus of NGC 4993 and the location of SSS17a, and broad-band UV through IR photometry of NGC 4993. The spectrum and broad-band spectral-energy distribution indicate that NGC 4993 has a stellar mass of log (M/M_solar) = 10.49^{+0.08}_{-0.20} and star formation rate of 0.003 M_solar/yr, and the progenitor system of SSS17a likely had an age of >2.8 Gyr. There is no counterpart at the position of SSS17a in the HST pre-trigger image, indicating that the progenitor system had an absolute magnitude M_V > -5.8 mag. We detect dust lanes extending out to almost the position of SSS17a and >100 likely globular clusters associated with NGC 4993. The offset of SSS17a is similar to many short gamma-ray burst offsets, and its progenitor system was likely bound to NGC 4993. The environment of SSS17a is consistent with an old progenitor system such as a binary neutron star system. Comment: ApJL in press |
نوع الوثيقة: | Working Paper |
DOI: | 10.3847/2041-8213/aa9116 |
URL الوصول: | http://arxiv.org/abs/1710.05439 |
رقم الأكسشن: | edsarx.1710.05439 |
قاعدة البيانات: | arXiv |
DOI: | 10.3847/2041-8213/aa9116 |
---|