RT Journal Article
T1 A galex-based search for the sparse young stellar population in the taurus-aurigae star forming region
A1 Gómez De Castro, Ana Inés
A1 López Santiago, Javier
A1 López Martínez, Fátima
A1 Sánchez, Néstor
A1 Sestito, Paola
A1 Castro Rubio, Elisa De
A1 Cornide Castro-Piñeiro, Manuel
A1 Yáñez Gestoso, Francisco Javier
AB In this work, we identify 63 bona fide new candidates to T Tauri stars (TTSs) in the Taurus-Auriga region, using its ultraviolet excess as our baseline. The initial data set was defined from the GALEX all sky survey (AIS). The GALEX satellite obtained images in the near-ultraviolet (NUV) and far-ultraviolet (FUV) bands where TTSs show a prominent excess compared with main-sequence or giants stars. GALEX AIS surveyed the Taurus-Auriga molecular complex, as well as a fraction of the California Nebula and the Perseus complex; bright sources and dark clouds were avoided. The properties of TTSs in the ultraviolet (GALEX), optical (UCAC4), and infrared (2MASS) have been defined using the TTSs observed with the International Ultraviolet Explorer reference sample. The candidates were identified by means of a mixed ultraviolet-optical-infrared excess set of colors; we found that the FUV-NUV versus J-K color-color diagram is ideally suited for this purpose. From an initial sample of 163,313 bona fide NUV sources, a final list of 63 new candidates to TTSs in the region was produced. The search procedure has been validated by its ability to detect all known TTSs in the area surveyed: 31 TTSs. Also, we show that the weak-lined TTSs are located in a well-defined stripe in the FUV-NUV versus J-K diagram. Moreover, in this work, we provide a list of TTSs photometric standards for future GALEX-based studies of the young stellar population in star forming regions.
PB University Chicago Press
SN 0067-0049
YR 2015
FD 2015-02
LK https://hdl.handle.net/20.500.14352/24011
UL https://hdl.handle.net/20.500.14352/24011
LA eng
NO © 2015. The American Astronomical Society. All rights reserved. This research was partially supported by grant AYA2011-29754-C03-01 from the Government of Spain.
NO Government of Spain
DS Docta Complutense
RD 19 sept 2025