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NuSTAR reveals the hidden nature of SS433

Middleton, M. J. and Walton, D. J. and Alston, W. and Dauser, T. and Eikenberry, S. and Jiang, Y.-F. and Fabian, A. C. and Fuerst, F. and Brightman, M. and Marshall, H. and Parker, M. and Pinto, C. and Harrison, F. A. and Bachetti, M. and Altamirano, D. and Bird, A. J. and Perez, G. and Miller-Jones, J. and Charles, P. A. and Boggs, S. and Christensen, F. and Craig, W. and Forster, K. and Grefenstette, B. and Hailey, C. and Madsen, K. and Stern, D. and Zhang, W. (2018) NuSTAR reveals the hidden nature of SS433. . (Submitted)

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SS433 is the only Galactic binary system known to accrete at highly super-critical rates, analogous to tidal disruption events and some high redshift quasars. Probing the inner regions of SS433 in the X-rays is crucial to understanding the system yet has not been possible due to obscuration. NuSTAR observed SS433 in the hard X-ray band across multiple phases of its super-orbital precession period. Spectral-timing tools have allowed us to determine that the hard X-ray emission from the inner regions is scattered towards us by the walls of the wind-cone. By comparing to numerical models, we determine an intrinsic X-ray luminosity of ≥ 1×10^(38) erg/s and a face-on luminosity of > 1×10^(39) erg/s. A lag due to absorption by Fe XXV/XXVI in outflowing material travelling at least 0.14-0.29c strengthens the association with ultraluminous X-ray sources and - in future - will allow us to map a super-critical outflow for the first time.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Middleton, M. J.0000-0002-8183-2970
Walton, D. J.0000-0001-5819-3552
Alston, W.0000-0003-2658-6559
Dauser, T.0000-0003-4583-9048
Fabian, A. C.0000-0002-9378-4072
Fuerst, F.0000-0003-0388-0560
Brightman, M.0000-0002-8147-2602
Parker, M.0000-0002-8466-7317
Pinto, C.0000-0003-2532-7379
Harrison, F. A.0000-0003-2992-8024
Bachetti, M.0000-0002-4576-9337
Altamirano, D.0000-0002-3422-0074
Miller-Jones, J.0000-0003-3124-2814
Boggs, S.0000-0001-9567-4224
Christensen, F.0000-0001-5679-1946
Forster, K.0000-0001-5800-5531
Grefenstette, B.0000-0002-1984-2932
Madsen, K.0000-0003-1252-4891
Stern, D.0000-0003-2686-9241
Zhang, W.0000-0002-1426-9698
Group:NuSTAR, Space Radiation Laboratory, Astronomy Department
Record Number:CaltechAUTHORS:20190225-081654781
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93196
Deposited By: Tony Diaz
Deposited On:25 Feb 2019 16:27
Last Modified:17 Dec 2019 21:53

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