The Old Host-galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational-wave Source
| Autor: | Ryan J. Foley, Enia Xhakaj, J. D. Simon, Nidia Morrell, Konstantina Boutsia, César Rojas-Bravo, David J. Osip, Jason X. Prochaska, Anthony L. Piro, Enrico Ramirez-Ruiz, David A. Coulter, Maria R. Drout, Armin Rest, Ariadna Murguia-Berthier, Benjamin J. Shappee, Charles D. Kilpatrick, Daniel Kasen, Matthew R. Siebert, Yen-Chen Pan |
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| Rok vydání: | 2017 |
| Předmět: |
Absolute magnitude
astro-ph.SR Stellar mass astro-ph.GA Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Astronomy & Astrophysics 01 natural sciences individual (NGC 4993) [galaxies] 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010306 general physics 010303 astronomy & astrophysics individual [stars] Astrophysics::Galaxy Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) astro-ph.HE High Energy Astrophysical Phenomena (astro-ph.HE) Physics individual (SSS17a) [stars] Star formation individual [galaxies] Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Dust lane Neutron star Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Globular cluster Astrophysics::Earth and Planetary Astrophysics Astrophysics - High Energy Astrophysical Phenomena Astronomical and Space Sciences |
| Zdroj: | 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 2017, ' The Old Host-galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational-wave Source ', Astrophysics Journal Letters, vol. 848, no. 2, L30 . https://doi.org/10.3847/2041-8213/aa9116 Pan, YC; Kilpatrick, CD; Simon, JD; Xhakaj, E; Boutsia, K; Coulter, DA; et al.(2017). The Old Host-galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational-wave Source. Astrophysical Journal Letters, 848(2). doi: 10.3847/2041-8213/aa9116. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/7gh663p7 Astrophysical Journal Letters, vol 848, iss 2 |
| ISSN: | 2041-8213 |
| Popis: | 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. ApJL in press |
| Databáze: | OpenAIRE |
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