Astronomy and Astrophysics Supplement Series

https://aas.aanda.org/

List of Papers (Total 1,649)

The B3-VLA quasar sample

A new low frequency radio selected Sample of 125 Quasars complete down to 100 mJy at 408 MHz is presented in this paper. The sample is a part of the B3-VLA sample: 1050 radiosources selected from the B3 catalogue at 408 MHz and observed at the VLA (1465 MHz, C and A configurations). Out of the 352 sources, identified on the POSS-I down to , 172 are quasar candidates. In this...

Library of high and mid-resolution spectra in the Ca ii H & K, H∝, , Hβ, Na i D1, D2, and He i D3 line regions of F, G, K and M field stars

In this work we present spectroscopic observations centered in the spectral lines most widely used as optical indicators of chromospheric activity (, , Ca ii H & K, and He i ) in a sample of F, G, K and M chromospherically inactive stars. The spectra have been obtained with the aim of providing a library of high and mid-resolution spectra to be used in the application of the...

A stellar coronograph for the COME-ON-PLUS adaptive optics system - I. Description and performance

The detection of faint emissions very close to much brighter objects is required in several different fields of astrophysics, for example in the search for planetary disks. We present here a coronograph that we built to work with , the ESO adaptive optics system, high angular resolution being of key importance in allowing observations close to a central, occulted object. The...

Photometric CCD sequences for calibration of the ESO/SERC atlas

For calibration of ESO/SERC survey plates, photometric CCD sequences have been obtained for 10 ESO/SERC fields in the area and . The sequences contain B, V and R magnitudes for 117 galaxies and 162 stars with .

Active region effects on solar irradiance at Na I D lines

The possibility to detect solar oscillations in the low frequency domain depends crucially on the power contrast among the oscillation signal and other time dependent signals in the same frequency range. The signal to noise ratio is increased by our ability to understand and remove solar sources of noise. In measurements of the mean Doppler velocity shift of the integrated solar...

New variable stars in the globular cluster NGC 288

We report discovery of 3 new faint variables in the globular cluster NGC 288: 2 SX Phe stars and 1 contact binary. Both SX Phe variables are blue stragglers. The contact binary is located below cluster turnoff, slightly to the red of the main sequence. New photometry of 6 previously known variables is also presented. We note that 26 out of a total 43 SX Phe stars identified...

The Washington Double Star Catalog (WDS, 1996.0)

A major revision of the Washington Double Star (WDS) catalog containing data for the components of 78 100 systems is now available from the data centers and via the World Wide Web (http://aries.usno.navy.mil/ad/wds/).

Photometric study of the close binary system DD Monocerotis

New BV light curves of the short-period eclipsing binary system DD Mon have been obtained. Light-curve variability is seen in both B and V bands as compared with the light curves obtained in 1986 by Yamasaki et al. (1990). The light curves are analyzed by using Wilson-Devinney's synthetic light-curve program, and the present photometric solution reveals that DD Mon is a near...

photometric sequences for nine selected dark globules

Using a CCD detector, BVRI photometry has been carried out in the vicinity of nine Lynds dark nebulae. In conjunction with spectroscopic data which could be obtained at a later stage, the data listed herein could be used for possible distance determinations of the nine nebulae.

Spatial distribution of neutral and ionic constituents in comet P/Halley

Multislit spectra of comet P/Halley were obtained on April 10, 1986, using a focal reducer with a field of angular diameter. The number and arrangement of the slits allowed a reconstruction of the spatial distribution of principal neutral and ionic coma constituents within a frame of about at the comet. Radial profiles and two-dimensional maps for the dust continuum, CN, , CH...

A list of new nearby dwarf galaxy candidates

To increase completeness of the distance limited sample of nearby galaxies from the the Kraan-Korteweg & Tammann (1979) catalogue we undertook a search for small companions of larger known galaxies which have corrected radial velocities within 500 km/s. Based primarely on the POSS-II and ESO/SERC films we found 260 nearby dwarf galaxy candidates with angular diameters  arcmin...

The revised GB/GB2 sample of extragalactic radio sources

This paper presents the revised sample of 373 extragalactic radio sources brighter than 0.2 Jy at 1.4 GHz. These sources, selected from the finding Green Bank surveys, were mapped at 1465 MHz using the VLA at different configurations. The biases introduced into the original GB and GB2 catalogues by confusion as well as partial resolution by the VLA at A-configuration, are...

Four colour photometry of binary systems - III. The early-type binary system CR Cassiopeiae

This paper presents new uvby light curves of the detached eclipsing binary CR Cas together with some measurements. From the analysis of the photometry we have estimated preliminary values for interstellar reddening and distance, radiative parameters of both components and an approximation to the geometrical elements of the system. The intrinsic photometric indices are compatible...

Hipparcos photometry of 24 variable massive stars (α Cygni variables)

The photometric variability of 24 α Cyg variables, i.e. variable super–and hypergiants, observed by the Hipparcos satellite is described. Three of the selected stars are situated in the SMC, 12 in the LMC and the remaining 9 in the Galactic plane. Four of them are hot S Dor–type variables, or LBVs (luminous blue variables) and two are possible members of this class. Light curves...

A photometric catalogue of galaxies in the cluster Abell 85

We present two catalogues of galaxies in the direction of the rich cluster ABCD 85. The first one includes 4232 galaxies located in a region from the cluster centre. It has been obtained from a list of more than 25000 galaxy candidates detected by scanning a Schmidt photographic plate taken in the BJ band. Positions are very accurate in this catalogue but magnitudes are not. This...

Numerical simulation of observations with GOLF on board SOHO

The main objective of the GOLF Experiment (Global Oscillations at Low Frequencies) on-board the SOHO (Solar and Heliospheric Observatory) space mission is the quantitative knowledge of the internal structure of the Sun by measuring the spectrum of its global oscillations in a wide frequency range (30 nHz to 6 mHz). There is special interest in detecting the low p- and g-modes...

Achromatic lens systems for near infrared instruments - II. Performances and limitations of standard Flint glasses

This paper investigates which normal Flint glasses are best suited for the design of lens systems working in the infrared up to about 1.7 μm, and possibly up to 2.5 μm. Between 0.9 and 2.5 μm the best known achromatic pairs are -2 and -3 and, to a lesser extent, -7 (Oliva & Gennari 1995). Unfortunately, Schott will most probably stop the production of these very little used and...

A deep λ20 cm radio continuum survey of M 31

We present a survey of the total and linearly polarized radio continuum emission of the Andromeda galaxy at 20 cm wavelength with the VLA-D array. 7 fields were observed with 45 angular resolution. The missing large-scale total emission observed with the Effelsberg telescope was inserted. This survey is the most sensitive radio continuum survey of M 31 so far and the first one in...

Structure and stellar content of dwarf galaxies - I. B and R photometry of dwarf galaxies in the M 81 group

We have carried out CCD photometry in the Cousins B and R bands of 25 dwarf galaxy members and suspected members of the M 81 group of galaxies. Based on azimuthally averaged brightness profiles we have derived total magnitudes, effective radii, effective surface brightnesses, as well as galaxy diameters at various isophotal levels in both photometric bands. Best-fitting...

Long-term visual spectrophotometric behaviour of Be stars

The long-term spectrophotometric variations of 49 Be stars are studied using the U and V magnitudes of the UBV system, the total Balmer discontinuity D and the visible gradient . BCD spectrophotometric and photometric data in five different photometric systems, obtained in most cases since 1950 and reduced to the BCD system, were used. The (), (), () and () correlations obtained...

Near-infrared images of star forming regions containing masers - Las Campanas observations of 31 southern sources

We present sensitive high resolution near infrared (NIR) broad band (J, H, and K) observations of a sample of 31 Star Forming Regions (SFRs) which contain H2O and OH maser sources. The observations are aimed at the detection and characterization of Young Stellar Objects (YSOs) which may be the source of excitation of the maser emission. In spite of the large number of sources...

Micrometer measurements of double stars from the Spanish observatories at Calar Alto and Santiago de Compostela

This paper reports 458 micrometer observations of visual double stars made with the 152 cm. telescope at Calar Alto Observatory (Almería, Spain) and with the 35 cm. telescope at Ramón María Aller Observatory (Santiago de Compostela, Spain).

Loose groups of galaxies in the Perseus–Pisces survey

We present a large catalog of loose groups of galaxies in the Southern Galactic Hemisphere, selected from the Perseus–Pisces redshift Survey (PPS). Particular care is taken in order to obtain group samples as homogeneous as possible to previously published catalogs. All our catalogs contain about 200 groups, significantly more than in most previous studies where group samples...

CCD astrometry and UBV photometry of visual binaries - II. Visual double stars with mainly G - type primaries and relatively small angular separation

Differences of magnitude and and colours, as well as separations and position angles of 42 relatively close double stars are presented. The selection criteria of our sample are: the relatively small separation (between 2.5 and 5 arcseconds), magnitude difference under 1.25 mag, and mainly G-type primaries. The CCD observations, performed at the 90 cm Dutch telescope at ESO, were...