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Submillimeter array observations of NGC 2264-C : molecular outflows and driving sources

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Cyganowski_2016_SubmillimeterArrayObservations_MNRAS_FinalPubVersion.pdf (6.192Mb)
Date
11/05/2016
Author
Cunningham, Nichol
Lumsden, Stuart L.
Cyganowski, Claudia Jane
Maud, Luke T.
Purcell, Cormac
Funder
Science & Technology Facilities Council
Grant ID
ST/M001296/1
Keywords
Stars: formation
ISM: jets and outflows
ISM: molecules
QB Astronomy
QC Physics
NDAS
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Abstract
We present 1.3 mm Submillimeter Array (SMA) observations at ∼3 arcsec resolution towards the brightest section of the intermediate/massive star-forming cluster NGC 2264-C. The millimetre continuum emission reveals ten 1.3 mm continuum peaks, of which four are new detections. The observed frequency range includes the known molecular jet/outflow tracer SiO (5−4), thus providing the first high-resolution observations of SiO towards NGC 2264-C. We also detect molecular lines of 12 additional species towards this region, including CH3CN, CH3OH, SO, H2CO, DCN, HC3N, and 12CO. The SiO (5−4) emission reveals the presence of two collimated, high-velocity (up to 30 km s−1 with respect to the systemic velocity) bipolar outflows in NGC 2264-C. In addition, the outflows are traced by emission from 12CO, SO, H2CO, and CH3OH. We find an evolutionary spread between cores residing in the same parent cloud. The two unambiguous outflows are driven by the brightest mm continuum cores, which are IR-dark, molecular line weak, and likely the youngest cores in the region. Furthermore, towards the Red MSX Source AFGL 989-IRS1, the IR-bright and most evolved source in NGC 2264-C, we observe no molecular outflow emission. A molecular line rich ridge feature, with no obvious directly associated continuum source, lies on the edge of a low-density cavity and may be formed from a wind driven by AFGL 989-IRS1. In addition, 229 GHz class I maser emission is detected towards this feature.
Citation
Cunningham , N , Lumsden , S L , Cyganowski , C J , Maud , L T & Purcell , C 2016 , ' Submillimeter array observations of NGC 2264-C : molecular outflows and driving sources ' , Monthly Notices of the Royal Astronomical Society , vol. 458 , no. 2 , pp. 1742-1767 . https://doi.org/10.1093/mnras/stw359
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/stw359
ISSN
0035-8711
Type
Journal article
Rights
© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1093/mnras/stw359
Description
CJC was partially supported during this work by a National Science Foundation Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1003134.
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URI
http://hdl.handle.net/10023/8595

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