Mowat, C;
Hatchell, J;
Rumble, D;
Kirk, H;
Buckle, J;
Berry, DS;
Broekhoven-Fiene, H;
... Zhu, M; + view all
(2017)
The JCMT Gould Belt Survey: a first look at SCUBA-2 observations of the Lupus I molecular cloud.
Monthly Notices of the Royal Astronomical Society
, 467
(1)
pp. 812-835.
10.1093/mnras/stx042.
Preview |
Text
Viti_stx042.pdf - Published Version Download (3MB) | Preview |
Abstract
This paper presents observations of the Lupus I molecular cloud at 450 and 850 μm with Submillimetre Common User Bolometer Array (SCUBA-2) as part of the James Clerk Maxwell Telescope Gould Belt Survey (JCMT GBS). Nine compact sources, assumed to be the discs of young stellar objects (YSOs), 12 extended protostellar, pre-stellar and starless cores, and one isolated, low-luminosity protostar, are detected in the region. Spectral energy distributions, including submillimetre fluxes, are produced for 15 YSOs, and each is fitted with the models of Robitaille et al. The proportion of Class 0/I protostars is higher than that seen in other Gould Belt regions such as Ophiuchus and Serpens. Circumstellar disc masses are calculated for more evolved sources, while protostellar envelope masses are calculated for protostars. Up to four very low luminosity objects are found; a large fraction when compared to other Spitzer c2d regions. One YSO has a disc mass greater than the minimum mass solar nebula. 12 starless/protostellar cores are detected by SCUBA-2 and their masses are calculated. The stability of these cores is examined using both the thermal Jeans mass and a turbulent virial mass when possible. Two cores in Lupus I are super-Jeans and contain no known YSOs. One of these cores has a virial parameter of 1.1 ± 0.4, and could therefore be pre-stellar. The high ratio of Class 0/I to Class III YSOs (1:1), and the presence of a pre-stellar core candidate, provides support for the hypothesis that a shock recently triggered star formation in Lupus I.
| Type: | Article |
|---|---|
| Title: | The JCMT Gould Belt Survey: a first look at SCUBA-2 observations of the Lupus I molecular cloud |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stx042 |
| Publisher version: | http://doi.org/10.1093/mnras/stx042 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | catalogues, stars: formation, stars: pre-main-sequence, stars: protostars, ISM: structure, submillimetre: general |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1555887 |
Archive Staff Only
 |
View Item |
