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• W3098218352 startingPage "68" @default.
• W3098218352 abstract "We have studied the young stellar populations in NGC 602, in the Small Magellanic Cloud, using a novel method that we have developed to combine Hubble Space Telescope photometry in the V, I, and Halpha bands. We have identified about 300 pre-main sequence (PMS) stars, all of which are still undergoing active mass accretion, and have determined their physical parameters (effective temperature, luminosity, age, mass and mass accretion rate). Our analysis shows that star formation has been present in this field over the last 60 Myr. In addition, we can recognise at least two clear, distinct, and prominent episodes in the recent past: one about 2 Myr ago, but still ongoing in regions of higher nebulosity, and one (or more) older than 30 Myr, encompassing both stars dispersed in the field and two smaller clusters located about 100 arcsec north of the centre of NGC 602. The relative locations of younger and older PMS stars do not imply a causal effect or triggering of one generation on the other. The strength of the two episodes appears to be comparable, but the episode occurring more than 30 Myr ago might have been even stronger than the current one. We have investigated the evolution of the mass accretion rate M_acc as a function of the stellar parameters finding that log M_acc ~ -0.6 log t + log m + c, where t is the age of the star, m its mass and c is a decreasing function of the metallicity." @default.
• W3098218352 created "2020-11-23" @default.
• W3098218352 creator A5004420981 @default.
• W3098218352 creator A5050264382 @default.
• W3098218352 creator A5074986428 @default.
• W3098218352 date "2013-09-05" @default.
• W3098218352 modified "2023-10-02" @default.
• W3098218352 title "PHOTOMETRIC DETERMINATION OF THE MASS ACCRETION RATES OF PRE-MAIN-SEQUENCE STARS. IV. RECENT STAR FORMATION IN NGC 602" @default.
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• W3098218352 doi "https://doi.org/10.1088/0004-637x/775/1/68" @default.
• W3098218352 hasPublicationYear "2013" @default.
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