Results 1 to 10 of about 152 (111)

A Multiwavelength Assessment Disfavoring the X-Ray Binary Origin of He iii Regions in Metal-poor Star-forming Dwarf Galaxies

The Astrophysical Journal
Recent observations of metal-poor, star-forming dwarf galaxies reveal He III regions, traced by nebular He ii λ 4686 emission, that require a strong source of extreme-ultraviolet (EUV) radiation.
Ivan Altunin, Christopher Ellis, Richard M. Plotkin, Roberto Soria, Ryan Tanner, Erica Thygesen, Elena Gallo, Manfred W. Pakull, Andrea H. Prestwich, Amy Reines, Ryan Urquhart, Aarran W. Shaw   +11 more
doaj   +1 more source

The Geometric Crisis in Cygnus X-3: Limitations of Wind-fed Accretion and the Case for Roche Lobe Overflow

The Astrophysical Journal
Cygnus X-3 is a Galactic X-ray binary with a 4.8 hr orbital period operating in the ultraluminous regime. Although the system is viewed at a relatively low inclination ( i  ≈ 28°), it exhibits a deep orbital modulation.
Nicholas E. White
doaj   +1 more source

X-Ray Bright Active Galactic Nuclei in Local Dwarf Galaxies: Insights from eROSITA

The Astrophysical Journal
Although supermassive black holes (SMBHs) reside in the heart of virtually every massive galaxy, it remains debated whether dwarf galaxies commonly host SMBHs. Because low-mass galaxies may retain memory of the assembly history of their black holes (BHs),
Andrea Sacchi, Ákos Bogdán, Urmila Chadayammuri, Angelo Ricarte   +3 more
doaj   +1 more source

The First Insights into an Ultraluminous X-Ray Pulsar with XRISM: Phase-resolved High-resolution Spectroscopy of the Fe K-shell Band of M82 X-2

The Astrophysical Journal
During its performance-verification phase, XRISM observed the M82 galaxy for a net exposure of 207.7 ks, with the ultraluminous X-ray pulsar (ULXP) X-2 included in the field of view. A pulsation search identified a candidate signal with a period close to
Shogo B. Kobayashi, Peter Kosec, Erin Boettcher, Renata Cumbee, Adam Foster, Yutaka Fujita, Kotaro Fukushima, Skylar Grayson, Gabriel Grell, Edmund Hodges-Kluck, Ann Hornschemeier, Richard Kelley, Caroline Kilbourne, Mike Loewenstein, Ikuyuki Mitsuishi, Dustin Nguyen, Evan Scannapieco, Takeshi Tsuru, Noriko Yamasaki, Mihoko Yukita   +19 more
doaj   +1 more source

A Striking Confluence Between Theory and Observations of High-Mass X-ray Binary Pulsars. [PDF]

Res Astron Astrophys, 2018
Christodoulou DM, Laycock SGT, Kazanas D.   +2 more
europepmc   +1 more source

The Great Pretenders Among the ULX Class. [PDF]

Res Astron Astrophys, 2017
Christodoulou DM, Laycock SGT, Kazanas D, Cappallo R, Contopoulos I.   +4 more
europepmc   +1 more source

<i>NICER</i> and <i>Fermi</i> GBM Observations of the First Galactic Ultraluminous X-ray Pulsar Swift J0243.6+6124. [PDF]

Astrophys J, 2018
Wilson-Hodge CA, Malacaria C, Jenke PA, Jaisawal GK, Kerr M, Wolff MT, Arzoumanian Z, Chakrabarty D, Doty JP, Gendreau KC, Guillot S, Ho WCG, LaMarr B, Markwardt CB, Özel F, Prigozhin GY, Ray PS, Ramos-Lerate M, Remillard RA, Strohmayer TE, Vezie ML, Wood KS.   +21 more
europepmc   +1 more source

High-redshift star formation in the Atacama large millimetre/submillimetre array era. [PDF]

R Soc Open Sci, 2020
Hodge JA, da Cunha E.
europepmc   +1 more source

Variable Nature of Magnetically-Driven Ultra-Fast Outflows. [PDF]

Astrophys J Lett, 2018
Fukumura K, Kazanas D, Shrader C, Behar E, Tombesi F, Contopoulos I.   +5 more
europepmc   +1 more source

Super-Critical Accretion onto Stellar Mass Black Holes and Neutron Stars: A Short Review. [PDF]

Space Sci Rev
Middleton M, Lipunova G, Ohsuga K, Abramowicz M.   +3 more
europepmc   +1 more source