Far-infrared observations of a massive cluster forming in the Monoceros R2 filament hub ⋆ .

Autor:	Rayner TSM; Cardiff School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff, Wales, CF24 3AA, UK., Griffin MJ; Cardiff School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff, Wales, CF24 3AA, UK., Schneider N; I. Physik. Institut, University of Cologne, 50937 Cologne, Germany.; Laboratoire d'Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, B18N, allée G. Saint-Hilaire, 33615 Pessac, France., Motte F; Université Grenoble Alpes, CNRS, Institut de Planetologie et d'Astrophysique de Grenoble, 38000 Grenoble, France.; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Kӧnyves V; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., André P; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Di Francesco J; NRC, Herzberg Institute of Astrophysics, Victoria, Canada., Didelon P; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Pattle K; Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK., Ward-Thompson D; Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK., Anderson LD; Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA., Benedettini M; INAF - Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy., Bernard JP; Université de Toulouse, UPS-OMP, IRAP, Toulouse, France., Bontemps S; Laboratoire d'Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, B18N, allée G. Saint-Hilaire, 33615 Pessac, France., Elia D; INAF - Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy., Fuente A; Observatorio Astronómico Nacional (OAN), Apdo 112, E-28803 Alcalá de Henares, Madrid, Spain., Hennemann M; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Hill T; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France.; Joint ALMA Observatory, 3107 Alonso de Cordova, Vitacura, Santiago, Chile., Kirk J; Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK., Marsh K; Cardiff School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff, Wales, CF24 3AA, UK., Men'shchikov A; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Nguyen Luong Q; Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon, 305-348, Republic of Korea.; National Astronomical Observatory of Japan, Chile Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan., Peretto N; Cardiff School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff, Wales, CF24 3AA, UK., Pezzuto S; INAF - Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy., Rivera-Ingraham A; ESA/ESAC, 28691 Villanueva de la Cañada, Madrid, Spain., Roy A; Laboratoire AIM, CEA/IRFU - CNRS/INSU - Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France., Rygl K; INAF - Istituto di Radioastronomia, Via Gobetti 101, I-40129 Bologna, Italy., Sánchez-Monge Á; I. Physik. Institut, University of Cologne, 50937 Cologne, Germany., Spinoglio L; INAF - Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy., Tigé J; Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388 Marseille, France., Treviño-Morales SP; Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Madrid, Spain., White GJ; The Rutherford Appleton Laboratory, Chilton, Didcot OX11 0NL, UK.; Department of Physics and Astronomy, The Open University, Milton Keynes, UK.
Jazyk:	angličtina
Zdroj:	Astronomy and astrophysics [Astron Astrophys] 2017 Oct 31; Vol. 607.
DOI:	10.1051/0004-6361/201630039
Abstrakt:	We present far-infrared observations of Monoceros R2 (a giant molecular cloud at approximately 830 pc distance, containing several sites of active star formation), as observed at 70 μ m, 160 μ m, 250 μ m, 350 μ m, and 500 μ m by the Photodetector Array Camera and Spectrometer (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) instruments on the Herschel Space Observatory as part of the Herschel imaging survey of OB young stellar objects (HOBYS) Key programme. The Herschel data are complemented by SCUBA-2 data in the submillimetre range, and WISE and Spitzer data in the mid-infrared. In addition, C 18 O data from the IRAM 30-m Telescope are presented, and used for kinematic information. Sources were extracted from the maps with getsources , and from the fluxes measured, spectral energy distributions were constructed, allowing measurements of source mass and dust temperature. Of 177 Herschel sources robustly detected in the region (a detection with high signal-to-noise and low axis ratio at multiple wavelengths), including protostars and starless cores, 29 are found in a filamentary hub at the centre of the region (a little over 1% of the observed area). These objects are on average smaller, more massive, and more luminous than those in the surrounding regions (which together suggest that they are at a later stage of evolution), a result that cannot be explained entirely by selection effects. These results suggest a picture in which the hub may have begun star formation at a point significantly earlier than the outer regions, possibly forming as a result of feedback from earlier star formation. Furthermore, the hub may be sustaining its star formation by accreting material from the surrounding filaments.
Databáze:	MEDLINE
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