Gas and dust in the beta Pictoris moving group as seen by the Herschel Space Observatory
Abstract
Context. Debris discs are thought to be formed through the collisional grinding of planetesimals, and then can be considered as the outcome of planet formation. Understanding the properties of gas and dust in debris discs can help us comprehend the architecture of extrasolar planetary systems. Herschel Space Observatory far-infrared (IR) photometry and spectroscopy have provided a valuable dataset for the study of debris discs gas and dust composition. This paper is part of a series of papers devoted to the study of Herschel-PACS observations of young stellar associations.
Aims: This work aims at studying the properties of discs in the beta Pictoris moving group (BPMG) through far-IR PACS observations of dust and gas.
Methods: We obtained Herschel-PACS far-IR photometric observations at 70, 100, and 160 μm of 19 BPMG members, together with spectroscopic observations for four of them. These observations were centred at 63.18 μm and 157 μm, aiming to detect [OI] and [CII] emission. We incorporated the new far-IR observations in the SED of BPMG members and fitted modified blackbody models to better characterise the dust content.
Results: We have detected far-IR excess emission towards nine BPMG members, including the first detection of an IR excess towards HD 29391.The star
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2014
- DOI:
- 10.1051/0004-6361/201322901
- arXiv:
- arXiv:1404.1815
- Bibcode:
- 2014A&A...565A..68R
- Keywords:
-
- astrobiology;
- circumstellar matter;
- stars: evolution;
- Kuiper belt: general;
- astrochemistry;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 12 pages, 7 figures, 6 tables