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HD 156545 (DW Aps)


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A catalogue of eclipsing variables
A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.

Catalogue of Algol type binary stars
A catalogue of (411) Algol-type (semi-detached) binary stars ispresented in the form of five separate tables of information. Thecatalogue has developed from an earlier version by including more recentinformation and an improved layout. A sixth table lists (1872) candidateAlgols, about which fewer details are known at present. Some issuesrelating to the classification and interpretation of Algol-like binariesare also discussed.Catalogue is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/417/263

Stars with the Largest Hipparcos Photometric Amplitudes
A list of the 2027 stars that have the largest photometric amplitudes inHipparcos Photometry shows that most variable stars are all Miras. Thepercentage of variable types change as a function of amplitude. Thiscompilation should also be of value to photometrists looking forrelatively unstudied, but large amplitude stars.

Radio continuum emission from stars: a catalogue update.
An updated version of my catalogue of radio stars is presented. Somestatistics and availability are discussed.

A microwave survey of southern active stars
The results of a survey of 153 active-chromosphere stars made with theParkes 64-m telescope at 5.0/8.4 GHz from 1981 to 1987 are reported.Microwave emission was detected from 70 stars on at least one occasion,with the highest detection rate of 68 percent from the RS CVn group. TheCa II stars and Algol-type binaries yielded detection rates of 44 and 30percent, respectively. The maximum powers emitted by the stars at5.0/8.4 GHz ranged over five orders of magnitude, with a median of 2.5 x10 to the 10th W/Hz. The maximum brightness temperatures had a smallerrange of three orders of magnitude, with a median of 3.6 x 10 to the 9thK.

A Catalogue of Classical Evolved Algol-Type Binary Candidate Stars
Not Available

The q-log P distribution of classical ALGOLS
Data on a large sample (approximately 400) of candidates for theclassical Algol-type eclipsing binary configurations have beencollected. The mass-ratio q has been calculated on the assumption oftheir semi-detached nature, and then compared with corresponding periodfor some subsets of the sample. The tendency to slight overluminosity(compared with corresponding MS stars) of the primaries in classicalAlgols is confirmed. The role of the loss of angular momentum inclassical Algol evolution is considered, together with a method fordetermining representative parameters to characterize such effects usingthe sample data. The possible existence of a class of post-contactclassical Algols is noted.

Statistics of categorized eclipsing binary systems Lightcurve shapes, periods, and spectral types
The statistics of the light curve morphologies, eclipse depths, orbitalperiods, and spectral types of about 1000 eclipsing binary systems areexamined, after attempting to subdivide these binaries into variousbasic evolutionary categories. The applicability of statisticalcriteria, based on light curve morphologies and eclipse depths, for thecategorization of eclipsing binaries has been found more limited thanpreviously believed. In particular, EW-type light curves turn out to begood indicators of contact systems (though not conversely), while EA-and EB-type light curves have little physical significance. Moreover,the study reveals a strong deficit of short-period noncontact systems inthe whole spectral range, together with an underabundance of early-typecontact binaries (compared with the number of late-type contact pairs).Interestingly, the distribution of evolved Algol-type systems isshifted, on average, to periods longer than those of unevolved detachedsystems in the OB and early A spectral range (and to shorter periods inthe F spectral range).

A uvby, beta photometric survey of southern hemisphere
A uvby, beta photometric study of southern hemisphere eclipsing binarystars has been undertaken at Cerro Tololo Inter-American Observatory.The standardized colors and V magnitudes for 288 binaries at quadratureand/or at minimum are presented, along with an indication of theaccuracy of the standardization and photometry. Discussions of theresolving time of the pulse-counting photometers and of the atmosphericextinction at CTIO are included.

Minima and Photometry for Southern Hemisphere Eclipsing Binaries
Abstract image available at:http://adsabs.harvard.edu/abs/1981PASP...93..774M

A catalogue of parameters for eclipsing binaries
Not Available

Discovery and study of bright variable stars.
Not Available

Langfristige Periodenkontrolle fur Bedeckungsveranderliche der Bamberger Liste.
Not Available

Elements for Three Bamberg Variables
Not Available

Notes on new variable stars - HD 156545 = BV 418
Not Available

Notes on new variable stars - BD +54d 2193 (5.8m)
Not Available

A New Bright Southern Variable Star
Not Available

Photometric Light-Curves of Bright Southern BV-Stars Eclipsing Binaries
Not Available

First Results from the Bamberg South-African Station
Not Available

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观测天体数据

星座:天燕座
右阿森松:17h23m30.03s
赤纬:-67°55'44.9"
视星:8.906
距离:487.805 天文距离
右阿森松适当运动:-5.5
赤纬适当运动:-14.1
B-T magnitude:8.906
V-T magnitude:8.906

目录:
适当名称DW Aps
  (Edit)
HD 1989HD 156545
TYCHO-2 2000TYC 9276-267-1
USNO-A2.0USNO-A2 0150-17575977
HIPHIP 85095

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