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X-ray emission from hot subdwarfs with compact companions

We review the X-ray observations of hot subdwarf stars. While no X-ray emission has been detected yet from binaries containing B-type subdwarfs, interesting results have been obtained in the case of the two luminous O-type subdwarfs HD…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Sandro Mereghetti , Nicola La Palombara , Paolo Esposito , Andrea Tiengo

Search for High-Energy Neutrino Emission from Galactic X-ray Binaries with IceCube

We present the first comprehensive search for high-energy neutrino emission from high- and low-mass X-ray binaries conducted by IceCube. Galactic X-ray binaries are long-standing candidates for the source of Galactic hadronic cosmic rays…

High Energy Astrophysical Phenomena · Physics 2022-10-25 R. Abbasi , M. Ackermann , J. Adams , J. A. Aguilar , M. Ahlers , M. Ahrens , J. M. Alameddine , A. A. Alves , N. M. Amin , K. Andeen , T. Anderson , G. Anton , C. Argüelles , Y. Ashida , S. Axani , X. Bai , A. Balagopal V. , S. W. Barwick , B. Bastian , V. Basu , S. Baur , R. Bay , J. J. Beatty , K. -H. Becker , J. Becker Tjus , J. Beise , C. Bellenghi , S. Benda , S. BenZvi , D. Berley , E. Bernardini , D. Z. Besson , G. Binder , D. Bindig , E. Blaufuss , S. Blot , M. Boddenberg , F. Bontempo , J. Borowka , S. Böser , O. Botner , J. Böttcher , E. Bourbeau , F. Bradascio , J. Braun , B. Brinson , S. Bron , J. Brostean-Kaiser , S. Browne , A. Burgman , R. T. Burley , R. S. Busse , M. A. Campana , E. G. Carnie-Bronca , C. Chen , Z. Chen , D. Chirkin , K. Choi , B. A. Clark , K. Clark , L. Classen , A. Coleman , G. H. Collin , J. M. Conrad , P. Coppin , P. Correa , D. F. Cowen , R. Cross , C. Dappen , P. Dave , C. De Clercq , J. J. DeLaunay , D. Delgado López , H. Dembinski , K. Deoskar , A. Desai , P. Desiati , K. D. de Vries , G. de Wasseige , M. de With , T. DeYoung , A. Diaz , J. C. Díaz-Vélez , M. Dittmer , H. Dujmovic , M. Dunkman , M. A. DuVernois , T. Ehrhardt , P. Eller , R. Engel , H. Erpenbeck , J. Evans , P. A. Evenson , K. L. Fan , A. R. Fazely , A. Fedynitch , N. Feigl , S. Fiedlschuster , A. T. Fienberg , C. Finley , L. Fischer , D. Fox , A. Franckowiak , E. Friedman , A. Fritz , P. Fürst , T. K. Gaisser , J. Gallagher , E. Ganster , A. Garcia , S. Garrappa , L. Gerhardt , A. Ghadimi , C. Glaser , T. Glauch , T. Glüsenkamp , J. G. Gonzalez , S. Goswami , D. Grant , T. Grégoire , S. Griswold , C. Günther , P. Gutjahr , C. Haack , A. Hallgren , R. Halliday , L. Halve , F. Halzen , M. Ha Minh , K. Hanson , J. Hardin , A. A. Harnisch , A. Haungs , D. Hebecker , K. Helbing , F. Henningsen , E. C. Hettinger , S. Hickford , J. Hignight , C. Hill , G. C. Hill , K. D. Hoffman , R. Hoffmann , K. Hoshina , F. Huang , M. Huber , T. Huber , K. Hultqvist , M. Hünnefeld , R. Hussain , K. Hymon , S. In , N. Iovine , A. Ishihara , M. Jansson , G. S. Japaridze , M. Jeong , M. Jin , B. J. P. Jones , D. Kang , W. Kang , X. Kang , A. Kappes , D. Kappesser , L. Kardum , T. Karg , M. Karl , A. Karle , U. Katz , M. Kauer , M. Kellermann , J. L. Kelley , A. Kheirandish , K. Kin , T. Kintscher , J. Kiryluk , S. R. Klein , A. Kochocki , R. Koirala , H. Kolanoski , T. Kontrimas , L. Köpke , C. Kopper , S. Kopper , D. J. Koskinen , P. Koundal , M. Kovacevich , M. Kowalski , T. Kozynets , E. Krupczak , E. Kun , N. Kurahashi , N. Lad , C. Lagunas Gualda , J. L. Lanfranchi , M. J. Larson , F. Lauber , J. P. Lazar , J. W. Lee , K. Leonard , A. Leszczyńska , Y. Li , M. Lincetto , Q. R. Liu , M. Liubarska , E. Lohfink , C. J. Lozano Mariscal , L. Lu , F. Lucarelli , A. Ludwig , W. Luszczak , Y. Lyu , W. Y. Ma , J. Madsen , K. B. M. Mahn , Y. Makino , S. Mancina , I. C. Mariş , I. Martinez-Soler , R. Maruyama , S. McCarthy , T. McElroy , F. McNally , J. V. Mead , K. Meagher , S. Mechbal , A. Medina , M. Meier , S. Meighen-Berger , J. Micallef , D. Mockler , T. Montaruli , R. W. Moore , R. Morse , M. Moulai , R. Naab , R. Nagai , U. Naumann , J. Necker , L. V. Nguyen , H. Niederhausen , M. U. Nisa , S. C. Nowicki , A. Obertacke Pollmann , M. Oehler , B. Oeyen , A. Olivas , E. O'Sullivan , H. Pandya , D. V. Pankova , N. Park , G. K. Parker , E. N. Paudel , L. Paul , C. Pérez de los Heros , L. Peters , J. Peterson , S. Philippen , S. Pieper , M. Pittermann , A. Pizzuto , M. Plum , Y. Popovych , A. Porcelli , M. Prado Rodriguez , B. Pries , G. T. Przybylski , C. Raab , J. Rack-Helleis , A. Raissi , M. Rameez , K. Rawlins , I. C. Rea , Z. Rechav , A. Rehman , P. Reichherzer , R. Reimann , G. Renzi , E. Resconi , S. Reusch , W. Rhode , M. Richman , B. Riedel , E. J. Roberts , S. Robertson , G. Roellinghoff , M. Rongen , C. Rott , T. Ruhe , D. Ryckbosch , D. Rysewyk Cantu , I. Safa , J. Saffer , S. E. Sanchez Herrera , A. Sandrock , M. Santander , S. Sarkar , S. Sarkar , K. Satalecka , M. Schaufel , H. Schieler , S. Schindler , T. Schmidt , A. Schneider , J. Schneider , F. G. Schröder , L. Schumacher , G. Schwefer , S. Sclafani , D. Seckel , S. Seunarine , A. Sharma , S. Shefali , N. Shimizu , M. Silva , B. Skrzypek , B. Smithers , R. Snihur , J. Soedingrekso , D. Soldin , C. Spannfellner , G. M. Spiczak , C. Spiering , J. Stachurska , M. Stamatikos , T. Stanev , R. Stein , J. Stettner , T. Stezelberger , T. Stürwald , T. Stuttard , G. W. Sullivan , I. Taboada , S. Ter-Antonyan , J. Thwaites , S. Tilav , F. Tischbein , K. Tollefson , C. Tönnis , S. Toscano , D. Tosi , A. Trettin , M. Tselengidou , C. F. Tung , A. Turcati , R. Turcotte , C. F. Turley , J. P. Twagirayezu , B. Ty , M. A. Unland Elorrieta , N. Valtonen-Mattila , J. Vandenbroucke , N. van Eijndhoven , D. Vannerom , J. van Santen , J. Veitch-Michaelis , S. Verpoest , C. Walck , W. Wang , T. B. Watson , C. Weaver , P. Weigel , A. Weindl , M. J. Weiss , J. Weldert , C. Wendt , J. Werthebach , M. Weyrauch , N. Whitehorn , C. H. Wiebusch , N. Willey , D. R. Williams , M. Wolf , G. Wrede , J. Wulff , X. W. Xu , J. P. Yanez , E. Yildizci , S. Yoshida , S. Yu , T. Yuan , Z. Zhang , P. Zhelnin

The origin of the X-ray-emitting object moving away from PSR B1259-63

A mysterious X-ray-emitting object has been detected moving away from the high-mass gamma-ray binary PSR B1259-63, which contains a non-accreting pulsar and a Be star whose winds collide forming a complex interaction structure. Given the…

High Energy Astrophysical Phenomena · Physics 2015-12-16 Maxim V. Barkov , Valenti Bosch-Ramon

Milliarcsec-scale radio emission of ultraluminous X-ray sources: steady jet emission from an intermediate-mass black hole?

The origin of the high X-ray luminosities of most ultraluminous X-ray sources (ULXs) still remains poorly understood. Most of the scenarios proposed to explain their nature assume that ULXs are powered by accretion on to a black hole (BH).…

High Energy Astrophysical Phenomena · Physics 2013-09-19 M. Mezcua , S. A. Farrell , J. C. Gladstone , A. P. Lobanov

Search for X-ray emission from subdwarf B stars with compact companion candidates

Stellar evolutionary models predict that most of the early type subdwarf stars in close binary systems have white dwarf companions. More massive companions, such as neutron stars or black holes, are also expected in some cases. The presence…

Solar and Stellar Astrophysics · Physics 2015-05-30 Sandro Mereghetti , Sergio Campana , Paolo Esposito , Nicola La Palombara , Andrea Tiengo

Compact radio emission indicates a structured jet was produced by a binary neutron star merger

The binary neutron star merger event GW170817 was detected through both electromagnetic radiation and gravitational waves. Its afterglow emission may have been produced by either a narrow relativistic jet or an isotropic outflow. High…

High Energy Astrophysical Phenomena · Physics 2019-02-26 G. Ghirlanda , O. S. Salafia , Z. Paragi , M. Giroletti , J. Yang , B. Marcote , J. Blanchard , I. Agudo , T. An , M. G. Bernardini , R. Beswick , M. Branchesi , S. Campana , C. Casadio , E. Chassande-Mottin , M. Colpi , S. Covino , P. D'Avanzo , V. D'Elia , S. Frey , M. Gawronski , G. Ghisellini , L. I. Gurvits , P. G. Jonker , H. J. van Langevelde , A. Melandri , J. Moldon , L. Nava , A. Perego , M. A. Perez-Torres , C. Reynolds , R. Salvaterra , G. Tagliaferri , T. Venturi , S. D. Vergani , M. Zhang

Radio Emission and Orbital Motion from the Close-Encounter Star-Brown Dwarf Binary WISE J072003.20-084651.2

We report the detection of radio emission and orbital motion from the nearby star-brown dwarf binary WISE J072003.20-084651.2AB. Radio observations across the 4.5-6.5 GHz band with the Very Large Array identify at the position of the system…

Solar and Stellar Astrophysics · Physics 2015-08-27 Adam J. Burgasser , Carl Melis , Jacob Todd , Christopher R. Gelino , Gregg Hallinan , Daniella Bardalez Gagliuffi

Spectral evidence for jets from Accreting Millisecond X-ray Pulsars

Transient radio emission from X-ray binaries is associated with synchrotron emission from collimated jets that escape the system, and accreting millisecond X-ray pulsars (AMXPs) are no exception. Although jets from black hole X-ray binaries…

Astrophysics · Physics 2009-11-13 David M. Russell , Rob P. Fender , Peter Jonker , Dipankar Maitra

VLA monitoring of LS V +44 17 reveals scatter in the X-ray--radio correlation of Be/X-ray binaries

LS V +44 17 is a persistent Be/X-ray binary (BeXRB) that displayed a bright, double-peaked period of X-ray activity in late 2022/early 2023. We present a radio monitoring campaign of this outburst using the Very Large Array. Radio emission…

High Energy Astrophysical Phenomena · Physics 2023-11-07 J. van den Eijnden , A. Rouco Escorial , J. Alfonso-Garzón , J. C. A. Miller-Jones , P. Kretschmar , F. Fürst , N. Degenaar , J. V. Hernández Santisteban , G. R. Sivakoff , T. D. Russell , R. Wijnands

The evolving radio jet from the neutron star X-ray binary 4U 1820$-$30

The persistently bright ultra-compact neutron star low-mass X-ray binary 4U 1820$-$30 displays a $\sim$170 d accretion cycle, evolving between phases of high and low X-ray modes, where the 3 -- 10 keV X-ray flux changes by a factor of up to…

High Energy Astrophysical Phenomena · Physics 2021-08-11 T. D. Russell , N. Degenaar , J. van den Eijnden , M. Del Santo , A. Segreto , D. Altamirano , A. Beri , M. Diaz Trigo , J. C. A. Miller-Jones

Variable radio emission of neutron star X-ray binary Ser X-1 during its persistent soft state

Ser X-1 is a low mass neutron star X-ray binary and has been persistently accreting since its discovery in the 1960s. It has always been observed to be in a soft spectral state and has never showed substantial long-term X-ray variability.…

High Energy Astrophysical Phenomena · Physics 2024-06-12 E. C. Pattie , T. J. Maccarone , A. J. Tetarenko , J. C. A. Miller-Jones , M. Pichardo Marcano , L. E. Rivera Sandoval

Peculiar radio-bright behaviour of the Galactic black hole transient 4U 1543-47 in the 2021-2023 outburst

Correlated behaviours between the radio emission and the X-ray emission in Galactic black hole X-ray binaries (BH XRBs) in the X-ray hard state are crucial to the understanding of disc-jet coupling of accreting black holes. The BH transient…

High Energy Astrophysical Phenomena · Physics 2025-01-10 X. Zhang , W. Yu , F. Carotenuto , S. E. Motta , R. Fender , J. C. A. Miller-Jones , T. D. Russell , A. Bahramian , P. Woudt , A. K. Hughes , G. R. Sivakoff

Radio detections of the neutron star X-ray binaries 4U 1820-30 and Ser X-1 in soft X-ray states

We present the analysis of simultaneous X-ray (RXTE) and radio (VLA) observations of two atoll-type neutron star X-ray binaries: 4U 1820-30 and Ser X-1. Both sources were steadily in the soft (banana) X-ray state during the observations. We…

Astrophysics · Physics 2009-11-10 S. Migliari , R. P. Fender , M. Rupen , S. Wachter , P. G. Jonker , J. Homan , M. van der Klis

X-ray Variability and Evidence for Pulsations from the Unique Radio Pulsar/X-ray Binary Transition Object FIRST J102347.6+003841

We report on observations of the unusual neutron-star binary system FIRST J102347.6+003841 carried out using the XMM-Newton satellite. This system consists of a radio millisecond pulsar in an 0.198-day orbit with a ~0.2 solar-mass…

High Energy Astrophysical Phenomena · Physics 2010-09-20 Anne M. Archibald , Victoria M. Kaspi , Slavko Bogdanov , Jason W. T. Hessels , Ingrid H. Stairs , Scott M. Ransom , Maura A. McLaughlin

Jet spectral breaks in black hole X-ray binaries

In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to gamma-ray energies, the contribution of the jet is debated. The total luminosity, and hence power of the jet is critically…

High Energy Astrophysical Phenomena · Physics 2015-06-12 D. M. Russell , S. Markoff , P. Casella , A. G. Cantrell , R. Chatterjee , R. P. Fender , E. Gallo , P. Gandhi , J. Homan , D. Maitra , J. C. A. Miller-Jones , K. O'Brien , T. Shahbaz

A re-establishing jet during an X-ray re-brightening of the Be/X-ray binary Swift J0243.6+6124

Transient Be/X-ray binary systems, wherein a compact object accretes from a Be-companion star, can show giant and periastron outbursts. During the decay of their giant outbursts, some Be/X-ray binaries also show X-ray re-brightenings, the…

High Energy Astrophysical Phenomena · Physics 2019-01-09 J. van den Eijnden , N. Degenaar , T. D. Russell , J. V. Hernández Santisteban , R. Wijnands , J. C. A. Miller-Jones , A. Rouco Escorial , G. R. Sivakoff

Variable, circularly polarized radio emission from the Young Stellar Object [BHB2007]-1: another ingredient of a unique system

The young stellar object [BHB2007]-1 has been extensively studied in the past at radio, millimeter, and infrared wavelengths. It shows a gap in the disk and previous observations claimed the possible emission from a forming sub-stellar…

Solar and Stellar Astrophysics · Physics 2024-10-23 Simranpreet Kaur , Josep M. Girart , Daniele Viganò , Álvaro Sánchez Monge , L. Ilsedore Cleeves , Alice Zurlo , Fabio Del Sordo , Òscar Morata , Trisha Bhowmik , Felipe O. Alves

The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. V. Rising X-ray Emission from an Off-Axis Jet

We report the discovery of rising X-ray emission from the binary neutron star (BNS) merger event GW170817. This is the first detection of X-ray emission from a gravitational-wave source. Observations acquired with the Chandra X-ray…

High Energy Astrophysical Phenomena · Physics 2017-10-17 Raffaella Margutti , E. Berger , W. Fong , C. Guidorzi , K. D. Alexander , B. D. Metzger , P. K. Blanchard , P. S. Cowperthwaite , R. Chornock , T. Efterkari , M. Nicholl , V. A. Villar , P. K. G. Williams , J. Annis , D. A. Brown , H. Y. Chen , Z. Doctor , J. A. Frieman , D. E. Holz , M. Sako , M. Soares-Santos

Powerful jets from black hole X-ray binaries in Low/Hard X-ray states

Four persistent (Cygnus X-1, GX 339-4, GRS 1758-258 and 1E 1740.7-2942) and three transient (GS 2023+38, GRO J0422+32 and GS 1354-64) black hole X-ray binary systems have been extensively observed at radio wavelengths during extended…

Astrophysics · Physics 2009-10-31 R. P. Fender

Radio and X-ray observations of jet ejection in Cygnus X-2

The ejection of a relativistic jet has been observed in the luminous Galactic low mass X-ray binary Cygnus X-2. Using high resolution radio observations, a directly resolved ejection event has been discovered while the source was on the…

High Energy Astrophysical Phenomena · Physics 2015-06-16 R. E. Spencer , A. P. Rushton , M. Balucinska-Church , Z. Paragi , N. S. Schulz , J. Wilms , G. G. Pooley , M. J. Church