PROTOSTARS AND STARS IN THE CORONET CLUSTER: AGE, EVOLUTION, AND CLUSTER STRUCTURE

Aurora Sicilia-Aguilar (Lead / Corresponding author), Thomas Henning, Jouni Kainulainen, Veronica Roccatagliata

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present new optical spectroscopy with the FLAMES spectrograph at the Very Large Telescope (VLT), near-IR imaging with VLT/HAWK-I, and 870 mu m mapping with APEX/LABOCA of the Coronet cluster. The optical data allow us to estimate spectral types, extinction, and the presence of accretion in 6 more M-type members, in addition to the 12 that we had previously studied. The submillimeter maps and near-IR data reveal the presence of nebular structures and high extinction regions, which are in some cases associated to known IR, optical, and X-ray sources. Most star formation is associated to two elongated structures crossing in the central part of the cluster. Placing all the 18 objects with known spectral types and extinction in an H-R diagram suggests that the cluster is younger than previously thought (AU - Sicilia-Aguilar, Aurora
Original languageEnglish
Article number137
Number of pages13
JournalAstrophysical Journal
Volume736
Issue number2
DOIs
Publication statusPublished - 19 Jul 2011

Keywords

  • protoplanetary disks stars: formation stars: late-type stars: pre-main sequence X-RAY SOURCES AUSTRALIS MOLECULAR CLOUD SPITZER-SPACE-TELESCOPE CRA DARK CLOUD LOW-MASS STARS FORMING REGIONS DISK EVOLUTION INFRARED OBSERVATIONS SOLAR NEIGHBORHOOD BROWN DWARFS

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