Results 101 to 110 of about 28,625 (211)

Recent Developments in Degenerate Higher Order Scalar Tensor Theories

Annalen der Physik, Volume 537, Issue 2, February 2025.
Degenerate Higher Order Scalar Tensor theories are reviewed, together with their applications in cosmology and astrophysics. These theories have been applied to build models of the early universe, in the description of the late‐time cosmic acceleration, as well as in astrophysics, including black hole physics. They have the potential to provide answers
Andrei Lazanu
wiley   +1 more source

Gamma-ray binaries: microquasars and binary systems with pulsar

Il Nuovo Cimento C, 2011
Invited talk presented at the Workshop "SciNeGHE 2010", September 8-10, 2010, Trieste, Italy; 6 pages, 1 figure.
openaire   +2 more sources

An Algebraic Approach to Light–Matter Interactions

Advanced Physics Research, Volume 4, Issue 1, January 2025.
This is a review of an algebraic approach to light–matter interactions that is theoretically powerful and computationally friendly. Theoretical expressions can be developed and manipulated conveniently thanks to the generality of the basis on which the approach rests, and a compact notation.
Ivan Fernandez‐Corbaton
wiley   +1 more source

Modeling high-energy light curves of the PSR B1259-63/LS 2883 binary based on 3-D SPH simulations

, 2012
Temporal changes of X-ray to very-high-energy gamma-ray emissions from the pulsar-Be star binary PSR B1259-63/LS 2883 are studied based on 3-D SPH simulations of pulsar wind interaction with Be-disk and wind.
A. Kawachi, A. T. Okazaki, Abdo, Bate, Bongiorno, Carciofi, Corbet, Ferland, Hinton, Hirayama, J. Takata, Johnston, Johnston, K. Hayasaki, Kawachi, Khangulyan, Lee, Longair, M. Mori, M. S. Yamaguchi, Moldón, Nagataki, Negueruela, Okazaki, Porter, Rybicki, S. Nagataki, S. P. Owocki, S.-H. Lee, Sari, Silaj, T. Naito, Takata, Tam, Tavani, Uchiyama, Xu   +36 more
core   +1 more source

XMM‐Newton Observations of the Peculiar Be X‐Ray Binary A0538‐66

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT A0538‐66 is a neutron star/Be x‐ray binary located in the Large Magellanic Cloud and, since its discovery in the 70s, it showed a peculiar behavior that makes it a unique object in the high‐mass x‐ray binaries scene: the extremely eccentric orbit (e=0.72$$ e=0.72 $$), the short spin period of the neutron star (P=69$$ P=69 $$ ms), the episodes ...
Michela Rigoselli, Caterina Tresoldi, Lorenzo Ducci, Sandro Mereghetti   +3 more
wiley   +1 more source

COBIPLANE: A Systematic Search for Compact Binary Millisecond Pulsars at Low Galactic Latitudes

The Astrophysical Journal
We present the main results obtained from the Compact Binary Pulsar Search in the Low-Latitude Neighborhood, an optical photometric survey designed to find new “spider” binary millisecond pulsars.
Marco Turchetta, Manuel Linares, Karri Koljonen, Paulo A. Miles-Páez, Jordan A. Simpson   +4 more
doaj   +1 more source

The Role of XMM–Newton in the Investigation of Persistent BeXRBs

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT The persistent BeXRBs are a class of high‐mass X‐ray binaries (HMXRBs), which are characterized by persistent low X‐ray luminosities (LX~1034$$ {L}_{\mathrm{X}}\sim {10}^{34} $$ erg s −1$$ {}^{-1} $$) and wide (Porb>$$ {P}_{\mathrm{orb}}> $$ 30 days), almost circular orbits. In these sources the NS is slowly rotating (with Pspin$$ {P}_{\mathrm{
Nicola La Palombara, Lara Sidoli, Sandro Mereghetti, Gian Luca Israel, Paolo Esposito   +4 more
wiley   +1 more source

Binary Pulsars: Observations and Implications [PDF]

Symposium - International Astronomical Union, 1987
The Galaxy contains a large number of neutron stars in gravitation-ally bound binary systems. Among the most fruitful of these to study have been the binary radio pulsars, of which seven are now known. Unlike the “accretion-powered” neutron stars located in mass-exchanging X-ray binary systems, the “rotation-powered” binary radio pulsars are found in ...
openaire   +1 more source

Eccentric Binary Millisecond Pulsars

, 2009
In this paper we review the recent discovery of several millisecond pulsars (MSPs) in eccentric binary systems. Timing these MSPs we were able to estimate (and in one case precisely measure) their masses. These results suggest that, as a class, MSPs have a much wider range of masses (1.3 to > 2 solar masses) than the normal and mildly recycled ...
openaire   +2 more sources

Optical identification of the companion to PSR J1911-5958A, the pulsar binary in the outskirts of NGC 6752

, 2003
We report on the identification of the optical counterpart of the binary millisecond pulsar PSR J1911-5958A, located in the outskirts of the globular cluster NGC 6752. At the position of the pulsar we find an object with V=22.08, B-V=0.38, U-B=-0.49. The
Althaus, Anderson, Assafin, C. G. Bassa, Callanan, Colpi, D'Amico, Dolphin, Dolphin, Driebe, Edmonds, F. Verbunt, Gratton, Holtzman, Holtzman, L. Homer, Lugger, M. H. van Kerkwijk, Phinney, Schlegel, Serenelli, Thorsett, Van Kerkwijk, Zacharias   +23 more
core   +1 more source