Highlights - Volume 480-2 (March III 2008)

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HIGHLIGHTS: this week in A&A

Volume 480-2 (March III 2008)


In section 7. Stellar atmospheres

“Interacting coronae of two T Tauri stars: first observational evidence for solar-like helmet streamers”, by M. Massi et al., A&A 480, p. 481

The young binary system V773 Tauri A exhibits a persistent radio flaring activity that gradually increases from a level of a few mJy at apoastron to more than 100 mJy at periastron. The authors show that both stars emit independent helmet streamers, which had never been observed in stars other than the Sun. The flare activity is caused by magnetic reconnection due to inter-binary collision.  


In section 5. Galactic structure, stellar clusters, and populations

“IPHAS and the symbiotic stars.I. Selection method and first discoveries”, by R.L.M. Corradi et al., A&A 480, p. 401

This paper presents IPHAS, the photometric Hα survey of the Northern Galactic plane. As an illustration of its potential uses, this paper presents a survey that is a systematic, complete search for symbiotic stars in a magnitude-limited volume, with the discovery of a significant number of new systems. The authors show the richness of the new survey and its ability to distinguish a wide range of emission line and related objects. 


In section 10. Planets and planetary systems

“Extrasolar planet detection by binary stellar eclipse timing: evidence for a third body around CM Draconis”, by H. Deeg et al., A&A 480, p. 555

The use of eclipse timing is standard for classical binaries studies and in the Solar system but this paper presents its novel application to detect an extrasolar planet based on superb timing information. The authors thus show evidence of a third body around the binary CM Draconis.  


© Astronomy & Astrophysics 2008