| Issue |
A&A
Volume 471, Number 2, August IV 2007
|
|
|---|---|---|
| Page(s) | 573 - 578 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20077570 | |
| Published online | 18 June 2007 | |
A new young stellar cluster embedded in a molecular cloud in the far outer Galaxy *,**
1
Universidade de Lisboa – Faculdade de Ciências, Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal e-mail: yun@oal.ul.pt
2
Departament d'Astronomia i Meteorologia, Facultat de Física, Planta 7a, Universitat de Barcelona, Avenida Diagonal 647, 08028 Barcelona, Spain e-mail: alopezse13@fis.ub.edu
3
Instituto de Ciencias del Espacio (CSIC) and Institut d'Estudis Espacials de Catalunya, Facultat de Física, Planta 7a, Universitat de Barcelona, Avenida Diagonal 647, 08028 Barcelona, Spain e-mail: torrelles@ieec.fcr.es
Received:
29
March
2007
Accepted:
16
May
2007
Aims.We report the discovery of a new young stellar cluster and molecular cloud located in the far outer Galaxy, seen towards IRAS 06361-0142, and we characterise their properties.
Methods.Near-infrared images obtained with VLT/ISAAC through 
s filters, millimetre line observations of CO(1-0) obtained with SEST, and VLA 6 cm continuum maps obtained from archive data.
Results.The cloud and cluster are located at a distance of 7 kpc and a
Galactocentric distance of 15 kpc, well in the far outer Galaxy. Morphologically, IRAS 06361-0142 appears as a cluster of several tens of stars surrounded by a nearly spherical nebular cavity centred at the position of the IRAS source. The cluster appears composed of low and intermediate-mass, young reddened stars with a large fraction having cleared the inner regions of their circumstellar discs responsible for (
s) colour excess. The observations are compatible with a 4 Myr cluster with variable spatial extinction between Av=6 and Av=13.
Key words: stars: formation / ISM: clouds / stars: pre-main sequence / ISM: dust, extinction / infrared: stars
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.