Variable Stars Common Observation
Mission in Particular Areas of the Sky
Elements for two T Tauri variables in Taurus
by Ivan Adamin in July-August 2013 (#1)
There are two T Tauri-alike variable sources were discovered in the constellation of Taurus by the VS-COMPAS team. Elements are refined.
T Tauri itself is the prototype for a class of very young stars, still in the process of gravitational contraction; that is, they have yet to evolve to reach the main sequence. These are pre-main sequence stars - the youngest visible of F, G, K, M spectral type.
|2MASS J05003003+1723591 (WTTS/ROT)|
|J2000.0:||05 00 30.04 +17 23 59.2|
|Mag. range:||11.78 - 11.93 V|
|Epoch:||HJD 2451594.56 (20 Feb 2000)|
Target stars are VSX J034605.3+292034 and a Weak-line T Tauri star
2MASS J05003003+1723591. (WTTS/ROT). Period is 3.08 days.
by Andrey Prokopovich, Ivan Adamin (VS-COMPAS), Sebastian Otero
Mean magnitude changes in ASAS-3 data and the period may be slightly different between datasets for 2MASS J05003003+1723591 (WTTS/ROT), which is a Weak-line T Tauri star. Type is derived from 1998A&AS..132..173L. Spectral type is confirmed to be G5IV. The brightness varies between 11.78 and 11.93 V. Rotational period believed to be 3.08 days, according to the NSVS data.
Roughly half of T Tauri stars have circumstellar disks, which in this case are called protoplanetary discs because they are probably the progenitors of planetary systems like the solar system. Circumstellar discs are estimated to dissipate on timescales of up to 10 million years. Most T Tauri stars are in binary star systems. In various stages of their life, they are called Young Stellar Objects (YSOs).
|Object Designation||RA (J2000)||DEC (J2000)||Type||Epoch *||Period||Mag. Range|
|2MASS J05003003+1723591||05 00 30.04||+17 23 59.2||WTTS/ROT||1594.56000||3.08||11.78 - 11.93 V|
|VSX J034605.3+292034||03 46 05.31||+29 20 34.2||TTS/ROT||4743.67300||0.3510939||12.4 - 12.7 CV|
* Epoch is given as HJD-2450000
Free Bulletin on Variable Stars
Variable Stars Observer Bulletin is all about variable stars science. It's made by amateurs and for amateurs. Here simplified contemporary data about different aspects of variable stars research is published. The bulletin is scheduled for six issues per year.
Want to contribute an article? Feel free to contact us at:
or please simply drop an email to [ivan dot adamin at gmail dot com]
Variables by Type
Variables by Magnitude
Variables by Period
Build Own Criteria