Abstract
Tidal forces close to massive black holes can violently disrupt stars that make a close approach. These extreme events are discovered via bright X-ray1,2,3,4 and optical/ultraviolet5,6 flares in galactic centres. Prior studies based on modelling decaying flux trends have been able to estimate broad properties, such as the mass accretion rate6,7. Here we report the detection of flows of hot, ionized gas in high-resolution X-ray spectra of a nearby tidal disruption event, ASASSN-14li in the galaxy PGC 043234. Variability within the absorption-dominated spectra indicates that the gas is relatively close to the black hole. Narrow linewidths indicate that the gas does not stretch over a large range of radii, giving a low volume filling factor. Modest outflow speeds of a few hundred kilometres per second are observed; these are below the escape speed from the radius set by variability. The gas flow is consistent with a rotating wind from the inner, super-Eddington region of a nascent accretion disk, or with a filament of disrupted stellar gas near to the apocentre of an elliptical orbit. Flows of this sort are predicted by fundamental analytical theory8 and more recent numerical simulations7,9,10,11,12,13,14.
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References
Bade, N., Komossa, S. & Dahlem, M. Detection of an extremely soft X-ray outburst in the HII-like nucleus of NGC 5905. Astron. Astrophys. 309, L35–L38 (1996)
Komossa, S. & Greiner, J. Discovery of a giant and luminous X-ray outburst from the optically inactive galaxy pair RX J1242.6–1119. Astron. Astrophys. 349, L45–L48 (1999)
Esquej, P. et al. Candidate tidal disruption events from the XMM-Newton slew survey. Astron. Astrophys. 462, L49–L52 (2007)
Cappelluti, N. et al. A candidate tidal disruption event in the Galaxy cluster Abell 3571. Astron. Astrophys. 495, L9–L12 (2009)
Gezari, S. et al. UV/optical detections of candidate tidal disruption events by GALEX and CFHTLS. Astrophys. J. 676, 944–969 (2008)
Gezari, S. et al. An ultraviolet-optical flare from the tidal disruption of a helium-rich stellar core. Nature 485, 217–220 (2012)
Guillochon, J., Manukian, H. & Ramirez-Ruiz, E. PS1–10jh: the disruption of a main-sequence star of near-solar composition. Astrophys. J. 783, 23 (2014)
Rees, M. J. Tidal disruption of stars by black holes of 106–108 solar masses in nearby galaxies. Nature 333, 523–528 (1988)
Strubbe, L. E. & Quataert, E. Optical flares from the tidal disruption of stars by massive black holes. Mon. Not. R. Astron. Soc. 400, 2070–2084 (2009)
Lodato, G., King, A. R. & Pringle, J. E. Stellar disruption by a supermassive black hole: is the light curve really proportional to t−5/3? Mon. Not. R. Astron. Soc. 392, 332–340 (2009)
Lodato, G. & Rossi, E. M. Multiband light curves of tidal disruption events. Mon. Not. R. Astron. Soc. 410, 359–367 (2011)
Strubbe, L. E. & Quataert, E. Spectroscopic signatures of the tidal disruption of stars by massive black holes. Mon. Not. R. Astron. Soc. 415, 168–180 (2011)
Shiokawa, H., Krolik, J. H., Cheng, R. M., Piran, T. & Noble, S. C. General relativistic hydrodynamic simulation of accretion flow from a stellar tidal disruption. Astrophys. J. 804, 85 (2015)
Miller, M. C. Disk winds as an explanation for slowly evolving temperatures in tidal disruption events. Astrophys. J. 805, 83 (2015)
Jose, J. et al. ASAS-SN discovery of an unusual nuclear transient in PGC 043234. Astron. Telegr. 6777, 1 (2014)
Gehrels, N. et al. The Swift Gamma-Ray Burst Mission. Astrophys. J. 611, 1005–1020 (2004)
Burrows, D. N. et al. The Swift X-ray telescope. Space Sci. Rev. 120, 165–195 (2005)
Voges, W. et al. The ROSAT All-Sky Survey bright source catalogue. Astron. Astrophys. 349, 389–405 (1999)
Phinney, E. S. in The Center of the Galaxy (ed. Morris, M. ) IAU Symp., 136, 543–553 (Kluwer Academic, 1989)
Kaastra, J. S., Mewe, R. & Nieuwenhuijzen, H. in UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas (eds Yamashita, K. & Watanabe, T. ) 411–414 (Universal Academy Press, Tokyo, 1996)
Loeb, A. & Ulmer, A. Optical appearance of the debris of a star disrupted by a massive black hole. Astrophys. J. 489, 573–578 (1997)
Piran, T., Svirski, G., Krolik, J., Cheng, R. M. & Shiokawa, H. Disk formation versus disk accretion—what powers tidal disruption events? Astrophys. J. 806, 164 (2015)
Shaviv, N. J. The theory of steady-state super-Eddington winds and its application to novae. Mon. Not. R. Astron. Soc. 326, 126–146 (2001)
Ramírez, J. M. Kinematics from spectral lines for AGN outflows based on time-independent radiation-driven wind theory. Rev. Mex. Astron. Astrofis. 47, 385–399 (2011)
Holoien, T. W.-S. et al. ASASSN-14ae: a tidal disruption event at 200 Mpc. Mon. Not. R. Astron. Soc. 445, 3263–3277 (2014)
Guillochon, J. & Ramirez-Ruiz, E. A dark year for tidal disruption events. Astrophys. J. 809, 166 (2015)
Stone, N. & Loeb, A. Observing Lense-Thirring precession in tidal disruption flares. Phys. Rev. Lett. 108, 061302 (2012)
Kaastra, J. S., Mewe, R. & Raassen, T. New results on X-ray models and atomic data. Highlights Astron. 13, 648–650 (2005)
Ahn, C. P. et al. The Tenth Data Release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment. Astrophys. J. Suppl. Ser. 211, 17 (2014)
Skrutskie, M. F. et al. The Two Micron All Sky Survey (2MASS). Astron. J. 131, 1163–1183 (2006)
Martin, D. C. et al. The Galaxy Evolution Explorer: a space ultraviolet survey mission. Astrophys. J. 619, L1–L6 (2005)
Kriek, M. et al. An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z = 2.2. Astrophys. J. 700, 221–231 (2009)
Bruzual, G. & Charlot, S. Stellar population synthesis at the resolution of 2003. Mon. Not. R. Astron. Soc. 344, 1000–1028 (2003)
Poole, T. S. et al. Photometric calibration of the Swift ultraviolet/optical telescope. Mon. Not. R. Astron. Soc. 383, 627–645 (2008)
Breeveld, A. A. et al. An updated ultraviolet calibration for the Swift/UVOT. AIP Conf. Ser. (eds McEnery, J. E., Racusin, J. L . & Gehrels, N. ), 1358, 373–376 (American Institute of Physics, 2011)
Guillochon, J. & Ramirez-Ruiz, E. Hydrodynamical simulations to determine the feeding rate of black holes by the tidal disruption of stars: the importance of the impact parameter and stellar structure. Astrophys. J. 767, 25 (2013)
Vinkó, J. et al. A luminous, fast rising UV-transient discovered by ROTSE: a tidal disruption event? Astrophys. J. 798, 12 (2015)
Acknowledgements
We thank Chandra Director B. Wilkes and the Chandra team for accepting our request for Director’s Discretionary Time, XMM-Newton Director N. Schartel and the XMM-Newton team for executing our approved target-of-opportunity program, and Swift Director N. Gehrels and the Swift team for monitoring this important source. J.M.M. is supported by NASA funding, through Chandra and XMM-Newton guest observer programs. The SRON Netherlands Institute for Space Research is supported by The Netherlands Organization for Scientific Research (NWO). J.J.D. was supported by NASA contract NAS8-03060 to the Chandra X-ray Center. W.P.M. is grateful for support by the University of Alabama Research Stimulation Program.
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J.M.M. led the Chandra and XMM-Newton data reduction and analysis, with contributions from J.S.K., J.J.D. and J.d.P. M.T.R. led the Swift data reduction and analysis (with help from S.B.C., S.G. and R.M.). M.C.M., E.R.-R. and J.G. provided theoretical insights. G.B., K.G., J.I., A.L., D.M., W.P.M., P.O’B., F.P., T.S. and N.T. contributed to the discussion and interpretation.
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Miller, J., Kaastra, J., Miller, M. et al. Flows of X-ray gas reveal the disruption of a star by a massive black hole. Nature 526, 542–545 (2015). https://doi.org/10.1038/nature15708
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DOI: https://doi.org/10.1038/nature15708
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