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Project VS-COMPAS

Variable Stars Common Observation
Mission in Particular Areas of the Sky



1215 stars discovered as of Nov 09, 2013
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Variable Stars Observer Bulletin #4/Jan-Feb 2014

The 4th issue is ready! Try our new interactive feature allowing online reading in a tablet-like way. Previous issues are on the way. The bulletin is also available for free in PDF format.

The bulletin is for amateurs who are interested in variable stars science.
There both simplified articles on the most contemporary research and publications from those who made an advanced progress in the field can be read.

Authors making research in the field of variable stars are welcome to publish their articles in the following issues! Should you have an article ready for sharing with the community, just contact us, so we can schedule it.

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Current Issue (#4)

Issue #4
January-February 2014




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PDF Bulletin on Variable Stars


Amateurs' Guide to Variable Stars


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In this issue:
BL Lacertae objects - Blazars
by Ivan Adamin

Discovery of a Second Radial Mode in the High Amplitude Delta Scuti Star NSVS 10590484 (GSC 01489-00914)
by Klaus Bernhard, Stefan Hummerich

Stellar associations: a variable stars nursery by Valery Tsehmeystrenko

Notable long-period eclipsing binaries. Part I. by Ivan Adamin

Pulsating variable stars and the Hertzsprung-Russell diagram
by Siarhey Hadon, Ivan Adamin

VV Cephei: an extraordinary binary system by Ivan Adamin

>>View Full Contents
Pulsating variable stars and the Hertzsprung-Russell diagram

Studying intrinsically pulsating variable stars plays a very important role in stellar evolution understanding. The Hertzsprung-Russell diagram is a powerful tool to track which stage of stellar life is represen-ted by a particular type of variable stars.

Let's see what major pulsating variable star types are and learn about their place on the H-R diagram. This approach is very useful, as it also allows to make a decision about a variability type of a star for which the properties are known partially.

Read more...

Articles / Publications

Wolf-Rayet stars: extremely hot, luminous and massive
by Ivan Adamin

Stellar associations: a variable stars nursery by Valery Tsehmeystrenko

The nearby eclipsing stellar system
δ Velorum
by Ivan Adamin

Carbon in the sky: a few remarkable carbon stars by Ivan Adamin

What are the R Coronae Borealis stars?
by Ivan Adamin

The FU Orionis phenomenon
by Ivan Adamin

Twenty New W Ursae Majoris-type Eclipsing Binaries from the Catalina Sky Survey by Stefan Hummerich,
Klaus Bernhard, Gregor Srdoc

Recent Highlights
VSX J160815.5+204914 // HER
EB | 13.48 - 13.93 V | P = 0.46640d
VSX J054250.6-140128 // LEP
EB | 13.24 - 13.55 V | P = 0.52867d
VSX J144729.9+115838 // BOO
HADS | 13.35 - 13.68 V | P = 0.0778d

VS-COMPAS Discoveries Timeline


Aug 17, 2012:    55 new discoveries are added increasing the total number of variable stars to 686 up to now. Please, follow chronologically ordered table for more details.

Jun 24, 2012:    During the past three weeks 53 more new variable stars were discovered! Plus another 68 stars were added by July 20th. More details coming soon. Please, check the list of variable star discoveries in a chronological order out here.

See Also: VS-COMPAS Project Historic Timeline

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