Results 31 to 40 of about 2,869 (212)

The radial velocity of the companion star in the low-mass X-ray binary 2S 0921-630 : limits on the mass of the compact object [PDF]

, 2005
In this paper we report on optical spectroscopic observations of the low-mass X-ray binary 2S 0921–630 obtained with the Very Large Telescope. We found sinusoidal radial velocity variations of the companion star with a semi-amplitude of 99.1 ± 3.1 km s−1
van der Klis, M., Nelemans, G., Steeghs, D., Nelemans, G.A., Jonker, P. G., Jonker, P.G.   +5 more
core   +1 more source

A massive millisecond pulsar in an eccentric binary [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
The recent discovery of a population of eccentric (e ~ 0.1) millisecond pulsar (MSP) binaries with low-mass white dwarf companions in the Galactic field represents a challenge to evolutionary models that explain MSP formation as recycling: all such models predict that the orbits become highly circularised during a long period of accretion.
E. D. Barr, P. C. C. Freire, M. Kramer, D. J. Champion, M. Berezina, C. G. Bassa, A. G. Lyne, B. W. Stappers   +7 more
openaire   +4 more sources

Multi-wavelength study of binary millisecond pulsars [PDF]

, 2021
The main object of my research activity has been the multi-wavelength study of the temporal evolution of binary millisecond pulsars (MSPs), from the accretion phase to the radio pulsar state.
MIRAVAL ZANON ARIANNA
core  

Black hole/pulsar binaries in the Galaxy [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2018
ABSTRACT We have performed population synthesis calculation on the formation of binaries containing a black hole (BH) and a neutron star (NS) in the Galactic disc. Some of important input parameters, especially for the treatment of common envelope evolution, are updated in the calculation.
Shao, Yong, Li, Xiang-Dong
openaire   +2 more sources

Gravity Tests with Radio Pulsars

Universe, 2020
The discovery of the first binary pulsar in 1974 has opened up a completely new field of experimental gravity. In numerous important ways, pulsars have taken precision gravity tests quantitatively and qualitatively beyond the weak-field slow-motion ...
Norbert Wex, Michael Kramer
doaj   +1 more source

PSR J2150+3427: A Possible Double Neutron Star System

The Astrophysical Journal Letters, 2023
PSR J2150+3427 is a 0.654 s pulsar discovered by the Commensal Radio Astronomy FAST Survey. From the follow-up observations, we find that the pulsar is in a highly eccentric orbit ( e = 0.601) with an orbital period of 10.592 days and a projected ...
Q. D. Wu, N. Wang, J. P. Yuan, D. Li, P. Wang, M. Y. Xue, W. W. Zhu, C. C. Miao, W. M. Yan, J. B. Wang, J. M. Yao, S. Q. Wang, S. N. Sun, F. F. Kou, D. Zhao, Y. T. Chen, S. J. Dang, Y. Feng, Z. J. Liu, X. L. Miao, L. Q. Meng, M. Yuan, C. H. Niu, J. R. Niu, L. Qian, S. Wang, X. Y. Xie, Y. F. Xiao, Y. L. Yue, S. P. You, X. H. Yu, R. S. Zhao, R. Yuen, X. Zhou, L. Zhang   +34 more
doaj   +1 more source

Origin and Binary Evolution of Millisecond Pulsars

, 2021
We summarize the channels formation of neutron stars (NS) in single or binary evolution and the classic recycling scenario by which mass accretion by a donor companion accelerates old NS to millisecond pulsars (MSP). We consider the possible explanations and requirements for the high frequency of the MSP population in Globular Clusters.
D'Antona, Francesca, Tailo, Marco
openaire   +2 more sources

Relativistic Binary Pulsars with Black Hole Companions [PDF]

The Astrophysical Journal, 2005
Binaries containing a stellar-mass black hole and a recycled radio pulsar have so far eluded detection. We present a focused investigation of the formation and evolution of these systems in the Galactic disk, highlighting the factors that limit their numbers and the reasons why they may be extremely rare.
Pfahl, E, Podsiadlowski, P, Rappaport, S
openaire   +2 more sources

Born to be recycled: A comprehensive population synthesis of the Galactic millisecond pulsars

Astronomy & Astrophysics
Context. Millisecond pulsars (MSPs) are the oldest and fastest pulsars known to date. The first MSP to be discovered was PSR B1937+21 in 1982. To explain how these pulsars could be formed, a new hypothesis was formulated: the recycling of pulsars, i.e ...
Sautron Mattéo, Pétri Jérôme, Mitra Dipanjan, Dupuy-Junet Adélie, Pietrin Marie-Eloïse   +4 more
doaj   +1 more source

An Eccentric Binary Millisecond Pulsar in the Galactic Plane [PDF]

Science, 2008
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar with a rotational period of 2.15 milliseconds in a highly eccentric ( e = 0.44) 95-day orbit around a solar mass (
Champion, D.J., Ransom, S.M., Lazarus, P., Camilo, F., Bassa, C., Kaspi, V.M., Nice, D.J., Freire, P.C.C., Stairs, I.H., van Leeuwen, J., Stappers, B.W., Cordes, J.M., Hessels, J.W.T., Lorimer, D.R., Arzoumanian, Z., Backer, D.C., Bhat, N.D.R., Chatterjee, S., Cognard, I., Deneva, J.S., Faucher-Giguère, C.A., Gaensler, B.M., Han, J., Jenet, F.A., Kasian, L., Kondratiev, V.I., Kramer, M., Lazio, J., McLaughlin, M.A., Venkataraman, A., Vlemmings, W.   +30 more
openaire   +6 more sources