Title

Protoplanetary Discs Of Young Vlmos Discovered In The Iphas Survey

Abstract

In a previous study, Virtual Observatory tools were used to cross-match the IPHAS catalogue with the 2MASS catalogue for searching young very low-mass objects. We defined photometric criteria to identify Hα emission sources with near-infrared colors similar to known young very low-mass stars and brown dwarfs. Spectral types have been derived for the 33 candidates that have spectroscopically confirmed Hα emission and spectral class M. Many objects also have weak NaI doublet, an indication of low surface gravity. Here we focus on a deeper study of the targets. We found that many of them display a clear excess in the Spitzer bandpasses, commonly associated with the presence of circumstellar material. Together with their strong Hα emission, which must be associated to accretion, the mid-infrared excesses confirm the youth of these objects.

Publication Date

7-1-2010

Publication Title

Proceedings of the 9th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VI, SEA 2010

Number of Pages

674-679

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

85090699750 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85090699750

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