The Young Stellar Population in the Solar Neighbourhood

Details The Young Stellar Population in the Solar Neighbourhood The Young Stellar Population in the Solar Neighbourhood

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..13e..10l&link_type=abstract

Exploiting Large Surveys for Galactic Astronomy, 26th meeting of the IAU, Joint Discussion 13, 22-23 August 2006, Prague, Czech

Astronomy and Astrophysics

Astronomy

Scientific paper

Stellar X-ray surveys play an important role in understanding the star formation history in our Galaxy in the last billion years (the scale time of coronal activity evolution). In particular, the comparison of observed counts in a given sky direction with predictions by Galactic models can yield constraints to the spatial distribution and stellar birthrate of stellar populations. The stellar content of the Galaxy in the Solar vicinity has been studied using the results of the XMM-Newton Bright Serendipitous Survey (XBSS), specifically of the Bright Serendipitous Sample (BSS), and the ROSAT North Ecliptic Pole survey (NEP). We have used the computational model XCOUNT for predicting the number of coronal sources and their distribution in spectral type in the area covered by the surveys. The comparison of the predictions with the observations shows an excess of observed yellow stars, consistent with a scenario with increasing stellar formation rate during the last billion years.

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