Urquhart, J. S. and Moore, T. J. T. and Csengeri, Tímea and Wyrowski, F. and Schuller, F. and Hoare, M. G. and Lumsden, S. L. and Mottram, J. C. and Thompson, M. A. and Menten, K. M. and Walmsley, C. M. and Bronfman, L. and Pfalzner, S. and König, C. and Wienen, M. (2014) ATLASGAL - towards a complete sample of massive star forming clumps. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 443 (2). pp. 1555-1586. ISSN 0035-8711
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Abstract
By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the RMS survey to massive clumps found in the submillimetre ATLASGAL sur- vey, we have identified ∼1000 embedded young massive stars between 280◦< ℓ < 350◦ and 10◦< ℓ < 60◦ with | b | < 1.5◦. Combined with an existing sample of radio-selected methanol masers and compact HII regions, the result is a catalogue of ∼1700 massive stars embed- ded within ∼1300 clumps located across the inner Galaxy, containing three observationally distinct subsamples, methanol-maser, MYSO and HII-region associations, covering the most important tracers of massive star formation, thought to represent key stages of evolution. We find that massive star formation is strongly correlated with the regions of highest column den- sity in spherical, centrally condensed clumps. We find no significant differences between the three samples in clump structure or the relative location of the embedded stars, which sug- gests that the structure of a clump is set before the onset of star formation, and changes little as the embedded object evolves towards the main sequence. There is a strong linear corre- lation between clump mass and bolometric luminosity, with the most massive stars forming in the most massive clumps. We find that the MYSO and HII-region subsamples are likely to cover a similar range of evolutionary stages and that the majority are near the end of their main accretion phase. We find few infrared-bright MYSOs associated with the most massive clumps, probably due to very short pre-main sequence lifetimes in the most luminous sources.
| Item Type: | Article |
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| Additional Information: | Kapcsolódó online katalógus: http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=J/MNRAS/443/1555 Funding Agency and Grant Number: ERC Advanced Investigator Grant GLOSTAR [247078]; Deutsche Forschungsgemeinschaft (DFG); Science and Technology Facilities Council of the UK; CONICYT project Basal [PFB-06]; Science and Technology Facilities Council [ST/J001465/1, ST/J001333/1, ST/L000628/1] Funding text: We thank Steve Longmore, Adam Ginsburg and Padelis Papadopoulos for discussions concerning the MPC candidate sources, and Mark Heyer and Rosie Chen for some interesting discussions on an earlier draft of the paper. We would also like to thank the referee for their comments and suggestions that have helped to significantly improve this manuscript. The ATLASGAL project is a collaboration between the Max-Planck-Gesellschaft, the European Southern Observatory (ESO) and the Universidad de Chile. This research has made use of the SIMBAD data base operated at CDS, Strasbourg, France. This work was partially funded by the ERC Advanced Investigator Grant GLOSTAR (247078) and was partially carried out within the Collaborative Research Council 956, subproject A6, funded by the Deutsche Forschungsgemeinschaft (DFG). This paper made use of information from the RMS survey data base at http://rms.leeds.ac.uk/cgi-bin/public/RMS_DATABASE.cgi which was constructed with support from the Science and Technology Facilities Council of the UK. LB acknowledges support from CONICYT project Basal PFB-06. |
| Uncontrolled Keywords: | mass function; Ism: clouds; stars: formation; Stars: early-type; Galaxy: structure; H Ii Regions; Stars: Luminosity Function; |
| Subjects: | Q Science / természettudomány > QB Astronomy, Astrophysics / csillagászat, asztrofizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 10 Apr 2024 11:54 |
| Last Modified: | 10 Apr 2024 11:54 |
| URI: | https://real.mtak.hu/id/eprint/192268 |
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