VISIR/VLT observations of brown dwarfs in Upper Scorpius

被引：0
|
作者：
Huélamo, N
Bouy, H
Sterzik, M
Pantin, E
Martín, EL
机构：
[1] European So Observ, Santiago, Chile
[2] Inst Astrofis Canarias, Tenerife, Spain
[3] CEA Saclay, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France
来源：
ASTRONOMISCHE NACHRICHTEN | 2005年 / 326卷 / 10期
关键词：
stars : low-mass stars; brown dwarfs; circumstellar disks; mid-IR; DISKS;
D O I：
10.1002/asna.200510441
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present mid-IR observations of a sample of very low-mass stars and brown dwarfs in the Upper Scorpius association. The main goal of these observations is to derive the disk frequency and the disk properties of the sample in order to shed light on brown dwarf formation theories. The observations have been performed with VISIR at the Very Large Telescope (VLT, Paranal). A total of ten targets were observed and six were detected. In this paper we show preliminary results for two of them: DENIS-PJ160334 and DENIS-PJ161939. While the former shows mid-IR fluxes consistent with pure photospheric emission, the latter displays strong mid-IR excesses which are probably related with a circumstellar disk.
引用
收藏
页码：1022 / 1023
页数：2
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