Astronomy and Astrophysics Supplement Series

https://aas.aanda.org/

List of Papers (Total 1,079)

The intraday variability in the radio-selected and X-ray-selected BL Lacertae objects

Seven BL Lac objects have been photometrically observed in an effort to study the difference of optical intraday variability between the radio-selected BL Lac objects (RBLs) and X-ray-selected BL Lac objects (XBLs). The objects we observed are selected arbitrarily. They are four RBLs, PKS 0735+178, PKS 0754+101, OJ 287 and BL Lac, and three XBLs, H 0323+022, H 0548-322 and H 2154...

A series of theoretical line profiles formed in the irradiated expanding atmospheres of close binary components

We studied the effects of irradiation on the line formation in the expanding atmospheres of the components of close binary systems. We considered a two-level atom approximation in Non-LTE situation. The thickness of the atmosphere is assumed to be twice that of the stellar radius. Expansion velocities are assumed to be as large as 50 mean thermal units. We have computed the lines...

Kinematical models of double radio sources and the unified scheme - II. The database

A large database of 1038 edge-brightened double radio sources has been collected from the literature with special emphasis on finding the best radio map for each source and on obtaining flux information of the extended radio lobes and the core component. The data are collected with two goals in mind. The first goal is to provide the data for our statistical study of double radio...

Mesures d'étoiles doubles effectuées à la lunette de 50 cm de l'Observatoire de Nice (2e série) - Measures of visual double stars made with the 50 cm refractor at the Nice Observatory (2nd series)

66 measures of 38 visual double stars made at the Observatoire de la Côte d'Azur, at Nice, in september et december 1997, with the 50 cm equatorial refractor equipped with filar micrometer and electronic recording device. Observation programmes of stars suspected double and new binaries discovered by Hipparcos, and measures of double stars which have seldom or never been observed...

The kinematics of 867 galactic planetary nebulae

We present a compilation of radial velocities of 867 galactic planetary nebulae. Almost 900 new measurements are included. Previously published kinematical data are compared with the new high-resolution data to assess their accuracies. One of the largest samples in the literature shows evidence for a systematic velocity offset. We calculate weighted averages between all available...

The ROSAT all-sky survey catalogue of optically bright main-sequence stars and subgiant stars

We present X-ray data for all main-sequence and subgiant stars of spectral types A, F, G, and K and luminosity classes IV and V listed in the Bright Star Catalogue that have been detected as X-ray sources in the ROSAT all-sky survey; several stars without luminosity class are also included. The catalogue contains 980 entries yielding an average detection rate of 32 percent. In...

The S2 baseband processing system for phase-coherent pulsar applications

The S2 baseband processing system (S2-BPS) is designed for a variety of pulsar measurements such as ultrafast signal fluctuations and pulse timing. Its key features are: the S2 recorder; the S2 Tape-to-Computer Interface (S2-TCI) which provides an efficient high data rate transfer from S2 tapes to computer; and the tightly coupled control interface to the computer which enables...

A strategy for fitting partially blended ridges in GONG solar p-mode spectra

Observations of solar oscillations by the Global Oscillation Network Group (GONG) using a network of telescopes deployed around the Earth eliminate temporal aliases from the oscillation power spectra to a very substantial extent, making the measurement of oscillation mode parameters much cleaner than with single-site observations. However, the problem of spatial aliasing, which...

Floating mirror horizon. Theory and design

A "floating mirror horizon" could substitute for the plate with mercury now used with astronomical instruments. It would have a greater and more stable reflectivity (by about 25%) than the present surface of just mercury, and have a distinctly better definition of images. With astrolabe instruments both images of a star would have practically the same brightness. There would be...

A strategy for fitting partially blended ridges in GONG solar p-mode spectra

Observations of solar oscillations by the Global Oscillation Network Group (GONG) using a network of telescopes deployed around the Earth eliminate temporal aliases from the oscillation power spectra to a very substantial extent, making the measurement of oscillation mode parameters much cleaner than with single-site observations. However, the problem of spatial aliasing, which...

Relativistic calculations on E1 transitions in As-like ions

Relativistic Quantum defect Orbital (RQDO) and Multiconfiguration Dirac-Fock (MCDF) calculations of oscillator strengths for the transition array of the Br III–La XXV As-like ions have been performed. For most of the studied ions and transitions no previous data have been found in the literature.

Comprehensive tables for the interpretation and modeling of the light curves of eclipsing binaries

We present parameters used in the investigation of the light curves of eclipsing binaries together with other data needed for the interpretation of their stellar and dynamical evolution. Parameters include limb-darkening coefficients and gravity darkening exponents, while data includes the apsidal motion constants, the moment of inertia, and the potential energy. The adopted...

Pole coordinates and shape of 30 asteroids

To obtain a statistically reliable sample of minor planets with known rotation axis orientation and axes ratios, a selection of photometric lightcurves sufficiently covered to give the elements needed for applying the computation methods of the rotational elements was made. Using the data reported in the "Amplitude-longitude plot catalogue of asteroids

A strategy for fitting partially blended ridges in GONG solar p-mode spectra

Observations of solar oscillations by the Global Oscillation Network Group (GONG) using a network of telescopes deployed around the Earth eliminate temporal aliases from the oscillation power spectra to a very substantial extent, making the measurement of oscillation mode parameters much cleaner than with single-site observations. However, the problem of spatial aliasing, which...

Atomic data from the IRON Project - XXIX. Radiative rates for transitions within the n = 2 complex in ions of the boron isoelectronic sequence

As part of the IRON Project, radiative rates have been calculated for the E1, E2 and M1 transitions within the complex in ions of the boron isoelectronic sequence (). The computations have been carried out with the atomic structure code superstructure which facilitates the generation of extended radiative datasets including configuration interaction, Breit–Pauli relativistic...

Integrated spectral study of reddened globular clusters and candidates

This paper presents integrated spectra in the range 6700 - 9500 for 20 Galactic globular clusters (and candidates) in the bulge and 5 others projected on the Galactic disk ( and ). Most of them are considerably reddened and are among those least studied in the literature. We derive reddening and metallicity from flux-calibrated spectra, thus providing independent information of...

Broad-band photometry of a sample of giants with 0.5 [Fe/H] -3

We present the results of a three-year campaign of broad-band photometry in the near-infrared J, H, K and bands for a sample of approximately 250 giant stars carried out at the Observatorio del Teide (Tenerife, Spain). Transformations of the Telescopio Carlos Sánchez system into/from several currently used infrared systems are extended to the redward part of the colour axis. The...

F, G and K stars in the ROSAT all-sky survey - I. Photometry

We present accurate photometry for a sample of F, G and K stars detected in selected areas of the ROSAT all-sky survey (RASS). We have used the photometry, in addition to low-resolution spectroscopy, to estimate spectral classifications, distances and X-ray luminosities. The in the sample lies below -2. Although the sample contains also nearby, inactive stars, it is dominated by...

A complete sample of GHz-peaked-spectrum radio sources and its radio properties

We define a complete sample of thirty-three GHz-Peaked-Spectrum (GPS) radio sources based on their spectral properties. We present measurements of the radio spectra and polarization of the complete sample and a list of additional GPS sources which fail one or more criteria to be included in the complete sample. The majority of the data have been obtained from quasi-simultaneous...

Spectral survey of Case emission–line galaxies with the 6 m Russian telescope

The results of the follow–up spectroscopy of 178 emission–line galaxy (ELG) candidates from the Case objective–prism survey and nine Markarian galaxies with the 6 m telescope are described. Only the candidates classified in the Case survey as those with emission lines were observed with the aim to form a statistical sample of blue compact galaxies (BCGs) with strong emission...

The overlapping open clusters NGC 1750 and NGC 1758 - II. photographic photometry and proper motions

Astrometry (positions and proper motions) and photographic BVR photometry were determined from a set of 29 photographic plates and CCD data in a region of in the area of open clusters NGC 1750 and NGC 1758 in Taurus. The iterative central overlap algorithm was used for the proper motion calculations. Plate-to-plate transformations and astrometric magnitude effects are discussed...

F, G and K stars in the ROSAT all-sky survey - I. Photometry

We present accurate photometry for a sample of F, G and K stars detected in selected areas of the ROSAT all-sky survey (RASS). We have used the photometry, in addition to low-resolution spectroscopy, to estimate spectral classifications, distances and X-ray luminosities. The in the sample lies below -2. Although the sample contains also nearby, inactive stars, it is dominated by...

Measured Stark widths and shifts of several N III spectral lines: Temperature dependence

Stark parameters (width and shift) of four doubly ionized nitrogen spectral lines, that belong to 3s-3p and 3p-3d transitions (lower multiplets), have been measured in a linear pulsed, low pressure, arc discharge in the nitrogen-oxygen and helium-nitrogen-oxygen plasmas in a (30 000 - 54 000) K electron temperature and a (0.75 1023 - 2.8 1023) electron density ranges. The...

Catalogue of HII regions measured on 6 m telescope plates at Observatoire de Marseille

Several galaxies were studied at Observatoire de Marseille using the films obtained at the 6 m telescope with the Great Focal Reducer installed at the prime focus of the russian telescope. We thought that before we retire, it should be of some interest for the astronomical community to find in a single catalogue all the data we published to facilitate the research. (see hereunder...

Stellar disks and embedded bars in early-type galaxies - I. 2-D photometric decomposition of 28 southern early-type galaxies

We present photometric disk-bulge decompositions of 28 southern early-type galaxies with types in either the RC3 or ESO-Lauberts & Valentijn catalogues. The decomposition method applied here is based on that developed by Scorza & Bender (1995) but the improved version allows for arbitrary surface brightness profiles of the disk models. We find three types of objects in this...