| Article | |
| Report number | arXiv:1808.07875 |
| Title | ASASSN-18ey: The Rise of a New Black-Hole X-ray Binary |
| Author(s) |
Tucker, M.A. (Inst. Astron., Honolulu) ; Shappee, B.J. (Inst. Astron., Honolulu) ; Holoien, T.W.-S. (Carnegie Inst. Observ.) ; Auchettl, K. ; Strader, J. (Michigan State U.) ; Stanek, K.Z. ; Kochanek, C.S. ; Bahramian, A. ; Dong, Subo ; Prieto, J.L. (Ohio State U., Dept. Astron.) ; Shields, J. ; Thompson, Todd A. ; Beacom, John F. (Michigan State U.) ; Chomiuk, L. ; Denneau, L. (Inst. Astron., Honolulu) ; Flewelling, H. ; Heinze, A.N. (LSST Corp.) ; Smith, K.W. (Inst. Astron., Honolulu) ; Stalder, B. ; Tonry, J.L. (Baltimore, Space Telescope Sci.) ; Weiland, H. (Inst. Astron., Honolulu) ; Rest, A. ; Huber, M.E. (Michigan State U.) ; Rowan, D.M. ; Dage, K. |
| Publication | 2018-10-29 |
| Imprint | 2018-08-23 |
| Number of pages | 8 |
| Note | 9 pages, 5 figures, submitted to ApJL. A summary video describing this publication can be found at https://youtu.be/YbM_koBfRSI |
| In: | Astrophys. J. 867 (2018) L9 |
| DOI | 10.3847/2041-8213/aae88a |
| Subject category | astro-ph.SR ; Astrophysics and Astronomy ; astro-ph.HE ; Astrophysics and Astronomy |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Abstract | We present the discovery of ASASSN-18ey, a new black hole low-mass X-ray binary discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). A week after ASAS-SN discovered ASASSN-18ey as an optical transient, it was detected as an X-ray transient by MAXI/GCS. Here, we analyze ASAS-SN and Asteroid Terrestrial-impact Last Alert System (ATLAS) pre-outburst optical light curves, finding evidence of intrinsic variability for several years prior to the outburst. While there was no long-term rise leading to outburst, as has been seen in several other systems, the start of the outburst in the optical preceded that in the X-rays by $7.20\pm0.97 \rm days$. We analyze the spectroscopic evolution of ASASSN-18ey from pre-maximum to $> 100 \rm days$ post-maximum. The spectra of ASASSN-18ey exhibit broad, asymmetric, double-peaked H$\alpha$ emission. The Bowen blend ($\lambda \approx 4650$\AA) in the post-maximum spectra shows highly variable double-peaked profiles, likely arising from irradiation of the companion by the accretion disk, typical of low-mass X-ray binaries. The optical and X-ray luminosities of ASASSN-18ey are consistent with black hole low-mass X-ray binaries, both in outburst and quiescence. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Zapis kreiran 2018-11-11, zadnja izmjena 2022-06-30
