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Castro Segura N, Knigge C, Long KS, Altamirano D, Armas Padilla M, Bailyn C, Buckley DAH, Buisson DJK, Casares J, Charles P, Combi JA, Cúneo VA, Degenaar ND, Del Palacio S, Díaz Trigo M, Fender R, Gandhi P, Georganti M, Gutiérrez C, Hernandez Santisteban JV, Jiménez-Ibarra F, Matthews J, Méndez M, Middleton M, Muñoz-Darias T, Özbey Arabacı M, Pahari M, Rhodes L, Russell TD, Scaringi S, van den Eijnden J, Vasilopoulos G, Vincentelli FM, Wiseman P. A persistent ultraviolet outflow from an accreting neutron star binary transient. Nature 2022; 603:52-57. [PMID: 35236977 DOI: 10.1038/s41586-021-04324-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 12/09/2021] [Indexed: 11/09/2022]
Abstract
All disc-accreting astrophysical objects produce powerful disc winds. In compact binaries containing neutron stars or black holes, accretion often takes place during violent outbursts. The main disc wind signatures during these eruptions are blue-shifted X-ray absorption lines, which are preferentially seen in disc-dominated 'soft states'1,2. By contrast, optical wind-formed lines have recently been detected in 'hard states', when a hot corona dominates the luminosity3. The relationship between these signatures is unknown, and no erupting system has as yet revealed wind-formed lines between the X-ray and optical bands, despite the many strong resonance transitions in this ultraviolet (UV) region4. Here we report that the transient neutron star binary Swift J1858.6-0814 exhibits wind-formed, blue-shifted absorption lines associated with C IV, N V and He II in time-resolved UV spectroscopy during a luminous hard state, which we interpret as a warm, moderately ionized outflow component in this state. Simultaneously observed optical lines also display transient blue-shifted absorption. Decomposing the UV data into constant and variable components, the blue-shifted absorption is associated with the former. This implies that the outflow is not associated with the luminous flares in the data. The joint presence of UV and optical wind features reveals a multi-phase and/or spatially stratified evaporative outflow from the outer disc5. This type of persistent mass loss across all accretion states has been predicted by radiation-hydrodynamic simulations6 and helps to explain the shorter-than-expected duration of outbursts7.
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Affiliation(s)
- N Castro Segura
- Department of Physics & Astronomy, University of Southampton, Southampton, UK.
| | - C Knigge
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - K S Long
- Space Telescope Science Institute, Baltimore, MD, USA.,Eureka Scientific, Inc., Oakland, CA, USA
| | - D Altamirano
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - M Armas Padilla
- Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain.,Departamento de Astrofísica, Universidad de La Laguna, La Laguna, Tenerife, Spain
| | - C Bailyn
- Department of Astronomy, Yale University, New Haven, CT, USA
| | - D A H Buckley
- South African Astronomical Observatory, Cape Town, South Africa
| | - D J K Buisson
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - J Casares
- Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain.,Departamento de Astrofísica, Universidad de La Laguna, La Laguna, Tenerife, Spain
| | - P Charles
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - J A Combi
- Instituto Argentino de Radioastronoma (CONICET; CICPBA; UNLP), Villa Elisa, Argentina
| | - V A Cúneo
- Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain.,Departamento de Astrofísica, Universidad de La Laguna, La Laguna, Tenerife, Spain
| | - N D Degenaar
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Amsterdam, The Netherlands
| | - S Del Palacio
- Instituto Argentino de Radioastronoma (CONICET; CICPBA; UNLP), Villa Elisa, Argentina
| | | | - R Fender
- Astrophysics, Department of Physics, University of Oxford, Oxford, UK
| | - P Gandhi
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - M Georganti
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - C Gutiérrez
- Department of Physics & Astronomy, University of Southampton, Southampton, UK.,Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Turku, Finland.,Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku, Finland
| | | | - F Jiménez-Ibarra
- Department of Physics and Astronomy, Macquarie University, Sydney, New South Wales, Australia.,Research Centre in Astronomy, Astrophysics and Astrophotonics, Macquarie University, Sydney, New South Wales, Australia
| | - J Matthews
- Institute of Astronomy, University of Cambridge, Cambridge, UK
| | - M Méndez
- Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands
| | - M Middleton
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - T Muñoz-Darias
- Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain.,Departamento de Astrofísica, Universidad de La Laguna, La Laguna, Tenerife, Spain
| | - M Özbey Arabacı
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - M Pahari
- Department of Physics & Astronomy, University of Southampton, Southampton, UK.,Department of Physics, IIT Hyderabad, Hyderabad, India
| | - L Rhodes
- Astrophysics, Department of Physics, University of Oxford, Oxford, UK
| | - T D Russell
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Amsterdam, The Netherlands.,INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Palermo, Italy
| | - S Scaringi
- Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham, UK
| | - J van den Eijnden
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Amsterdam, The Netherlands.,Astrophysics, Department of Physics, University of Oxford, Oxford, UK
| | - G Vasilopoulos
- Department of Astronomy, Yale University, New Haven, CT, USA.,Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg, UMR 7550, Strasbourg, France
| | - F M Vincentelli
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
| | - P Wiseman
- Department of Physics & Astronomy, University of Southampton, Southampton, UK
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Hermsen W, Hessels JWT, Kuiper L, van Leeuwen J, Mitra D, de Plaa J, Rankin JM, Stappers BW, Wright GAE, Basu R, Alexov A, Coenen T, Griessmeier JM, Hassall TE, Karastergiou A, Keane E, Kondratiev VI, Kramer M, Kuniyoshi M, Noutsos A, Serylak M, Pilia M, Sobey C, Weltevrede P, Zagkouris K, Asgekar A, Avruch IM, Batejat F, Bell ME, Bell MR, Bentum MJ, Bernardi G, Best P, Birzan L, Bonafede A, Breitling F, Broderick J, Bruggen M, Butcher HR, Ciardi B, Duscha S, Eisloffel J, Falcke H, Fender R, Ferrari C, Frieswijk W, Garrett MA, de Gasperin F, de Geus E, Gunst AW, Heald G, Hoeft M, Horneffer A, Iacobelli M, Kuper G, Maat P, Macario G, Markoff S, McKean JP, Mevius M, Miller-Jones JCA, Morganti R, Munk H, Orru E, Paas H, Pandey-Pommier M, Pandey VN, Pizzo R, Polatidis AG, Rawlings S, Reich W, Rottgering H, Scaife AMM, Schoenmakers A, Shulevski A, Sluman J, Steinmetz M, Tagger M, Tang Y, Tasse C, ter Veen S, Vermeulen R, van de Brink RH, van Weeren RJ, Wijers RAMJ, Wise MW, Wucknitz O, Yatawatta S, Zarka P. Synchronous X-ray and Radio Mode Switches: A Rapid Global Transformation of the Pulsar Magnetosphere. Science 2013; 339:436-9. [DOI: 10.1126/science.1230960] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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