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A wide-field near-infrared H 2 2.122 μ m line survey of the Braid Nebula star formation region in Cygnus OB7

Khanzadyan, Tigran, Davis, Chris J., Aspin, Colin, Froebrich, Dirk, Smith, Michael D., Magakian, Tigran Yu., Movsessian, Tigran, Moriarty-Schieven, G.H., Nikogossian, Elena H., Pyo, Tae-Soo, and others. (2012) A wide-field near-infrared H 2 2.122 μ m line survey of the Braid Nebula star formation region in Cygnus OB7. Astronomy & Astrophysics, 542 . ISSN 0004-6361. (doi:10.1051/0004-6361/201219124)

Abstract

Context. Outflows and jets are the first signposts of ongoing star formation processes in any molecular cloud, yet their study in optical bands provides limited results due to the large extinction present. Near-infrared unbiased wide-field observations in the H 2 1-0 S(1) line at 2.122 μm alleviates the problem, enabling us to detect more outflows and trace them closer to their driving sources. Aims. As part of a large-scale multi-waveband study of ongoing star formation in the Braid Nebula star formation region, we focus on a one square degree region that includes Lynds Dark Nebula 1003 and 1004. Our goal is to find all of the near-infrared outflows, uncover their driving sources and estimate their evolutionary phase. Methods. We use near-infrared wide-field observations obtained with WFCAM on UKIRT, in conjunction with previously-published optical and archival MM data, to search for outflows and identify their driving sources; we subsequently use colour-colour analysis to determine the evolutionary phase of each source. Results. Within a one square degree field we have identified 37 complex MHOs, most of which are new. After combining our findings with other wide-field, multi-waveband observations of the same region we were able to discern 28 outflows and at least 18 protostars. Our analysis suggests that these protostars are younger and/or more energetic than those of the Taurus-Auriga region. The outflow data enable us to suggest connection between outflow ejection and repetitive FU Ori outburst events. We also find that star formation progresses from W to E across the investigated region. © 2012 ESO.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201219124
Additional information: Unmapped bibliographic data: C7 - A111 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Astron. Astrophys. [Field not mapped to EPrints] AD - Max-Plank-Institut für Radioastronomie, Auf Dem Hügel 69, 53121 Bonn, Germany [Field not mapped to EPrints] AD - Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, HI 96720, United States [Field not mapped to EPrints] AD - Astrophysics Division, NASA HQ, 300 E Street SW, Mail Stop 3Y28, Washington, DC 20546, United States [Field not mapped to EPrints] AD - Institute for Astronomy, University of Hawaii, 640 N. A'ohoku Place, Hilo, HI 96720, United States [Field not mapped to EPrints] AD - Centre for Astrophysics and Planetary Science, School of Physical Sciences, University of Kent, Canterbury CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - V. A. Ambartsumyan Byurakan Astrophysical Observatory, 0213 Aragatsotn reg., Armenia [Field not mapped to EPrints] AD - NRC Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada [Field not mapped to EPrints] AD - Subaru Telescope, National Astronomical Observatory of Japan, 650 N. A'ohoku Place, Hilo, HI 96720, United States [Field not mapped to EPrints] AD - Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: ISM: clouds, ISM: jets and outflows, Stars: formation, Driving source, Evolutionary phase, ISM : clouds, ISM: jets and out flow, M-lines, Molecular clouds, Multi-wavebands, Near Infrared, Optical bands, Protostars, Star formation regions, Star formations, Star-formation process, Stars: formation, Wide-field, Infrared devices, Weaving, Stars
Subjects: Q Science > QB Astronomy
Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 20 Jul 2015 16:02 UTC
Last Modified: 29 May 2019 14:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49558 (The current URI for this page, for reference purposes)
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