Results 41 to 50 of about 2,506 (304)

Drop in the Hard Pulsed Fraction and a Candidate Cyclotron Line in IGR J16320–4751 Seen by NuSTAR

The Astrophysical Journal, 2023
We report on a timing and spectral analysis of a 50 ks NuSTAR observation of IGR J16320−4751 (= AX J1631.9−4752), a high-mass X-ray binary hosting a slowly rotating neutron star.
A. Bodaghee, J.-L. Chiu, J. A. Tomsick, V. Bhalerao, E. Bottacini, M. Clavel, C. Cox, F. Fürst, M. J. Middleton, F. Rahoui, J. Rodriguez, P. Romano, J. Wilms   +12 more
doaj   +1 more source

Massive Stars and their Compact Remnants in High-mass X-ray Binaries

, 2005
In a high-mass X-ray binary (HMXB) a massive star interacts with a neutron-star or black-hole companion in various ways. The gravitational interaction enables the measurement of fundamental parameters such as the mass of both binary components, providing important constraints on the evolutionary history of the system, the equation of state of matter at
Kaper, L., van der Meer, A.
openaire   +3 more sources

A New Class of High‐Mass X‐Ray Binaries: Implications for Core Collapse and Neutron Star Recoil [PDF]

The Astrophysical Journal, 2002
We investigate an interesting new class of high-mass X-ray binaries (HMXBs) with long orbital periods (P_orb > 30 days) and low eccentricities ...
Pfahl, E., Rappaport, S., Podsiadlowski, P., Spruit, H.   +3 more
openaire   +5 more sources

Optical emission from massive donors in ultraluminous X-ray source binary systems [PDF]

, 2008
We present evolutionary tracks of binary systems with high-mass companion stars and stellar-through-intermediate mass black holes (BHs). Using Eggleton's stellar evolution code, we compute the luminosity produced by accretion from the donor during its ...
Zampieri, L., Patruno, A.
core   +1 more source

Clumpy wind accretion in supergiant neutron star high mass X-ray binaries [PDF]

Astronomy & Astrophysics, 2016
The accretion of the stellar wind material by a compact object represents the main mechanism powering the X-ray emission in classical supergiant high mass X-ray binaries and supergiant fast X-ray transients. In this work we present the first attempt to simulate the accretion process of a fast and dense massive star wind onto a neutron star, taking into
Bozzo, Enrico, Oskinova, Lidia M. (Dr.), Feldmeier, Achim, Falanga, M.   +3 more
openaire   +3 more sources

Preliminary determinations of the masses of the neutron star and mass donor in the high mass X-ray binary system EXO 1722–363 [PDF]

Astronomy and Astrophysics, 2010
We intended to measure the radial velocity curve of the supergiant companion to the eclipsing high mass X-ray binary pulsar EXO1722-363 and hence determine the stellar masses of the components. We used a set of archival K$_{\rm s}$-band infrared spectra of the counterpart to EXO1722-363 obtained using ISAAC on the VLT, and cross-correlated them in ...
Mason, A. B., Norton, A. J., Clark, J. S., Negueruela, I., Roche, P.   +4 more
openaire   +3 more sources

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source

A radio pulsar/X-ray binary link [PDF]

, 2009
Radio pulsars with millisecond spin periods are thought to have been spun up by the transfer of matter and angular momentum from a low-mass companion star during an x-ray-emitting phase.
Dunlap, B.H., Dunlap, Bart H., Stairs, I.H., Kaspi, V.M., McLaughlin, Maura A., Kondratiev, V.I., Kaspi, Victoria M., Ransom, Scott M., Boyles, Jason, Lynch, Ryan, Kondratiev, Vladislav I., Champion, David J., Roberts, M.S.E., Rosen, R., Archibald, Anne M., van Leeuwen, Joeri, Archibald, A.M., Ransom, S.M., Lorimer, D.R., Jenet, F., Rosen, Rachel, van Leeuwen, J., Remillard, R.A., Barlow, B.N., Boyles, J., McLaughlin, M.A., Stairs, Ingrid H., Jenet, Frederick, Lorimer, Duncan R., Remillard, Ronald A., Champion, D.J., Roberts, Mallory S. E., Barlow, Brad N., Lynch, R., Hessels, J.W.T., Hessels, Jason W. T.   +35 more
core   +2 more sources

Measurement of the Orbital Parameters, Spin, and Spectral Evolution during the Main High State of Her X-1 with Insight-HXMT

The Astrophysical Journal
Based on Insight-HXMT observations, we present a detailed timing analysis and spectral evolution of a complete main high state for Her X-1 in 2020 February. We determine an accurate local ephemeris using the Rmer delay measured from five eclipses.
Wen Yang, Wei Wang, Qianhan Zhou
doaj   +1 more source

Neutron star masses from hydrodynamical effects in obscured supergiant high mass X-ray binaries [PDF]

Astronomy & Astrophysics, 2012
Context. A population of obscured supergiant high mass X-ray binaries has been discovered by INTEGRAL. X-ray wind tomography of IGR J17252-3616 inferred a slow wind velocity to account for the enhanced obscuration. Aims. The main goal of this study is to understand under which conditions high obscuration could occur. Methods.
A. Manousakis, R. Walter, J. M. Blondin
openaire   +1 more source