Journal•ISSN: 1055-6796
Astronomical & Astrophysical Transactions
Taylor & Francis
About: Astronomical & Astrophysical Transactions is an academic journal published by Taylor & Francis. The journal publishes majorly in the area(s): Galaxy & Stars. It has an ISSN identifier of 1055-6796. Over the lifetime, 1236 publications have been published receiving 4242 citations. The journal is also known as: Astronomical and astrophysical transactions & AApTr.
Topics: Galaxy, Stars, Elliptical galaxy, Pulsar, Neutron star
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a compilative catalogue of Be-X-ray binaries and candidates in the Galaxy and in the Large and Small Magellanic Clouds is presented, containing 130 sources and providing information on names and spectral types of optical components, distances, on spin characteristics of neutron stars and on orbital and X-ray properties of binary systems.
Abstract: We present a compilative catalogue of Be–X-ray binaries and candidates in the Galaxy and in the Large and Small Magellanic Clouds. This catalogue contains 130 sources and provides information on names and spectral types of optical components, distances, on spin characteristics of neutron stars and on orbital and X-ray properties of binary systems. We give brief comments on each object and provide necessary references to original data.
90 citations
TL;DR: In this article, it was shown that the formation of a neutron star with a strong magnetic field during the collapse may lead to the violation of the mirror symmetry and formation of an asymmetric magnetic field.
Abstract: Formation of a neutron star with a strong magnetic field during the collapse may lead to the violation of the mirror symmetry and formation of an asymmetric magnetic field. The dependence of the we...
85 citations
TL;DR: The catalogue of colour excesses, ages and distance moduli of open clusters of the authors' Galaxy is composed by reprocessing of published photometric data in the UBV, BV, RGU, DDO and uvbyβ systems using a homogeneous set of standard relations.
Abstract: The catalogue of colour excesses, ages and distance moduli of open clusters of our Galaxy is composed by reprocessing of published photometric data in the UBV, BV, RGU, DDO and uvbyβ systems using a homogeneous set of standard relations. The methods of cluster parameter estimation and computer routines used are briefly discussed. The catalogue of mean values of parameter estimates for 425 clusters is given.
73 citations
Journal Article•
TL;DR: In this article, a detailed review of the literature advocating a class of Seyfert galaxies intrinsically lacking broad emission lines is presented, concluding that there is little or no evidence for such objects.
Abstract: The first short part of this review is a general, but very detailed, critique of the literature advocating a class of Seyfert galaxies intrinsically lacking broad emission lines. My conclusion is that there is little or no evidence for such objects.
Panchromatic properties of all types of radio loud AGN are then reviewed in detail. Radio galaxies usually show subparsec-scale radio core sources, jets, and a pair of giant radio lobes. The optical spectra sometimes show only relatively weak lines of low-ionization ionic species, and no clear nuclear continuum in the optical or UV region of the spectrum. Some show strong high-ionization narrow lines. Finally, a few radio galaxies add broad bases onto the permitted lines. These spectral categories are the same as those for radio-quiet AGN and quasars.
By the 1980s, data from optical polarization and statistics of the radio properties required that many narrow line radio galaxies do in fact produce strong optical/UV continuum. This continuum and the broad line emission are hidden from the line of sight by dusty, roughly toroidal gas distributions, but they are seen in polarized flux. The radio galaxies with hidden quasars are referred to as "thermal."
Do all radio galaxies harbor hidden quasars? We now know the answer using the radio, infrared, optical and X-ray properties. Near the top of the radio luminosity function, for FRII, GPS, and CSS galaxies, the answer is yes. At somewhat lower luminosities, many do not. At the lowest radio luminosities, most do not. Instead these "nonthermal" weakly-accreting galaxies manifest their energetic output only as kinetic energy in the form of synchrotron jets. This applies to all types of radio galaxies, big FR II doubles, as well as the small young GPS and CSS sources. Only a few FR I sources are of the thermal type.
60 citations
[...]
TL;DR: The second edition of this book as discussed by the authors provides an up-to-date view of basic phenomenology, a discussion of the structure of dark halos in galaxies, the dynamics of quasi-relaxed stellar systems and globular clusters, galaxies and gravitational lensing and an introduction to self-gravitating accretion disks.
Abstract: Our understanding of galaxies, the building blocks of the Universe has advanced significantly in recent years. New observations from ground- and space-based telescopes, the discovery of dark matter, and new insights into its distribution have been instrumental in this. This textbook provides graduate students with a modern introduction to the gravitationally determined structure and evolution of galaxies. Readers will also benefit from detailed discussions of the issues involved in the process of modeling complex stellar systems. Additionally, the text provides an accessible framework for interpreting observations and devising new observational tests. Based on the author's extensive teaching experience, this second edition features an up-to-date view of basic phenomenology, a discussion of the structure of dark halos in galaxies, the dynamics of quasi-relaxed stellar systems and globular clusters, galaxies and gravitational lensing and an introduction to self-gravitating accretion disks. Extended problem sets are available from the accompanying resources website: www.cambridge.org/9781107000544.
60 citations