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Recent Activity
 
 

Variable Star Observations in Database:

31,771,033 and Counting ...
Last Observation Received:

10 min 8 sec ago by OJR - Jose Ripero Osorio (ES)

EI PSC   Sep 27.9500   <14.1Vis.   

 
 

Stellar News Feed

Periodicities of the RV Tau-type pulsating star DF Cygni: a combination of Kepler data with ground-based observations

The RV Tauri stars constitute a small group of classical pulsating stars with some dozen known members in the Milky Way. The light variation is caused predominantly by pulsations, but these alone do not explain the full complexity of the light curves. High quality photometry of RV Tau-type stars is very rare. DF Cygni is the only member of this class of stars in the original Kepler field, hence allowing the most accurate photometric investigation of an RV Tauri star to date.

Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties

At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. We summarize Gaia DR1 and provide illustrations of the scientific quality of the data, followed by a discussion of the limitations due to the preliminary nature of this release.

Read the pre-print on arXiv

Astronomers observe star reborn in a flash

An international team of astronomers using Hubble have been able to study stellar evolution in real time. Over a period of 30 years dramatic increases in the temperature of the star SAO 244567 have been observed. Now the star is cooling again, having been reborn into an earlier phase of stellar evolution. This makes it the first reborn star to have been observed during both the heating and cooling stages of rebirth.
 

Not Your Typical Protostar

At the centre of this image, captured by ESA’s Herschel space observatory, is a truly peculiar cosmic object: a star named IRAS 19312+1950.

Located over 12 000 light-years from us, this star has puzzled astronomers for many years because it shows conflicting signs of being both extremely old and extremely young.

Exploring the Birth of Binary Stars

More than half of all stars are thought to be in binary or multiple star systems. But how do these systems form? The misaligned spins of some binary protostars might provide a clue.

Read the full story on AAS Nova

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