CHANDRA AND SPITZER OBSERVATIONS REVEAL NEW YSOs IN THE HEART OF TRUMPLER 37

E. P. Mercer, J. M. Miller, N. Calvet, L. Hartmann, J. Hernandez, A. Sicilia-Aguilar, R. Gutermuth

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26 Citations (Scopus)

Abstract

We have discovered 22 new low-mass members in the center of the 4 Myr old open cluster Trumpler 37 (Tr 37) using archival Chandra and Spitzer data. Our use of the Chandra ACIS data and an improved reduction of Spitzer Infrared Array Camera data of the central region in Tr 37 led to the discovery of three new disk-bearing members, 19 new diskless members, and potentially 10 more infrared excess sources. Combining these new members with previous known members, we measured a disk frequency of similar to 39%, which is lower than the previously reported disk frequency of similar to 48%. Most of the new members are diskless stars that lie within 0.65 pc of the central massive O6.5V star HD 206267. The proximity of these sources to HD 206267 suggests photoevaporation may be accelerating disk evolution in the center of Tr 37. The new members have solar-type masses ranging from similar to 0.6 M(circle dot) to 1.8 M(circle dot), spectral types ranging from late to early K, and X-ray luminosities in the range 29.3 erg s(-1)
Original languageEnglish
Pages (from-to)7-18
Number of pages12
JournalAstronomical Journal
Volume138
Issue number1
DOIs
Publication statusPublished - 21 May 2009

Keywords

  • open clusters and associations: individual (Trumpler 37) stars: formation stars: pre-main sequence X-rays: stars T-TAURI STARS X-RAY-EMISSION ORION ULTRADEEP PROJECT INTERMEDIATE-MASS STARS NEWTON EXTENDED SURVEY YOUNG STELLAR OBJECTS MOLECULAR CLOUD SPACE-TELESCOPE HYDRAE ASSOCIATION NEBULA CLUSTER

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    Mercer, E. P., Miller, J. M., Calvet, N., Hartmann, L., Hernandez, J., Sicilia-Aguilar, A., & Gutermuth, R. (2009). CHANDRA AND SPITZER OBSERVATIONS REVEAL NEW YSOs IN THE HEART OF TRUMPLER 37. Astronomical Journal, 138(1), 7-18. https://doi.org/10.1088/0004-6256/138/1/7