Статья

Detection of Crystalline Silicates around the T Tauri Star Hen 3-600A

Mitsuhiko HondaDepartment of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, JapanHirokazu KatazaCenter for Advanced Spacecraft Technology, Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, JapanY. OkamotoInstitute of Physics, Center for Natural Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa 229-8555, JapanTakashi MiyataKiso Observatory, Institute of Astronomy, School of Science, University of Tokyo, Mitake, Nagano 397-0101, JapanTakuya YamashitaDepartment of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, JapanShigeyuki SakoDepartment of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, JapanShinya TakuboDepartment of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, JapanTakashi OnakaDepartment of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

2003en

ABI

Аннотация

We have carried out mid-infrared N-band spectroscopic observations of the T Tauri star Hen 3-600A in the TW Hydra association with the COMICS on the 8.2m Subaru Telescope and found structured features in its spectrum. These structured features are well explained by a combination of crystalline forsterite, crystalline enstatite, silica and glassy olivine grains. Among intermediate-mass young stellar objects (YSOs), crystalline silicates have already been detected, but no firm detection has been reported so far for low-mass YSOs such as T Tauri stars. This is the first clear detection of crystalline silicates in low-mass YSOs and shows that the crystallization event occurs even in the protoplanetary disk of low-mass YSOs in the T Tauri phase. The physical processes leading to the inferred dust composition in the Hen3-600A system may be analogous to those occured in the early epoch of the Solar system. Subject headings: circumstellar matter — stars: pre-main sequence 1 Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory

Перевод пока недоступен

Идентификаторы

DOI: 10.1086/374034

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar