The stellar population of the Lupus clouds

Abstract

view Abstract Citations (177) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Stellar Population of the Lupus Clouds Hughes, Joanne ; Hartigan, Patrick ; Krautter, Joachim ; Kelemen, Janos Abstract We present photometric and spectroscopic observations of the H alpha emission stars in the Lupus dark cloud complex. We estimate the effective temperatures of the stars from their spectral types and calculate the reddening towards each object from the (R-I) colors. From these data, we derive mass and age distributions for the Lupus stars using a new set of pre-main sequence evolutionar tracks. We compare the results for the Lupus stars with those for a similar population of young stellar objects in Taurus-Auriga and Chamaeleon and with the initial mass function for field stars in the solar neighborhood. From the H-R diagrams, Lupus appears to contain older stars than Taurus. The Lupus dark clouds form a greater proportion of low mass stars than the Taurus complex. Also, the proportion of low mass stars in Lupus is higher than that predicted by the Miller-Scalo initial mass function, and the lowest mass stars in Lupus are less active than similar T Tauri stars in other regions. Publication: The Astronomical Journal Pub Date: September 1994 DOI: 10.1086/117135 Bibcode: 1994AJ....108.1071H Keywords: Molecular Clouds; Star Formation; Stellar Mass; Stellar Physics; Stellar Spectra; T Tauri Stars; Astronomical Photometry; Astronomical Spectroscopy; Chronology; Graphs (Charts); Populations; Spectral Emission; Spectral Energy Distribution; Spectrum Analysis; Tables (Data); Astronomy; STARS: PRE-MAIN SEQUENCE full text sources ADS | data products SIMBAD (78)