The JCMT Gould Belt Survey: evidence for radiative heating in Serpens MWC 297 and its influence on local star formation
The JCMT Gould Belt Survey: evidence for radiative heating in Serpens MWC 297 and its influence on local star formation
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DOI：
10.1093/mnras/stu2695
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发表时间：
2014-12
影响因子：
4.8
通讯作者：
D. Rumble;J. Hatchell;R. Gutermuth;H. Kirk;J. Buckle;S. Beaulieu;D. Berry;H. Broekhoven-Fiene;M. Currie;M. Fich;T. Jenness;D. Johnstone;D. Johnstone;J. Mottram;D. Nutter;K. Pattle;J. E. Pineda;J. E. Pineda;C. Quinn;C. Salji;S. Tisi;S. Walker-Smith;J. D. Francesco;J. D. Francesco;M. Hogerheijde;D. Ward-Thompson;Lori Allen;L. Cieza;M. Dunham;P. Harvey;K. Stapelfeldt;P. Bastien;H. Butner;M. C. Chen;A. Chrysostomou;S. Coudé;C. Davis;E. Drabek-Maunder;A. Duarte-Cabral;J. Fiege;P. Friberg;R. Friesen;G. Fuller;S. Graves;J. Greaves;J. Gregson;J. Gregson;W. Holland;W. Holland;G. Joncas;J. Kirk;L. Knee;S. Mairs;K. Marsh;B. Matthews;B. Matthews;G. Moriarty-Schieven;J. Rawlings;J. Richer;D. Robertson;E. Rosolowsky;S. Sadavoy;H. Thomas;N. Tothill;S. Viti;G. White;G. White;C. Wilson;J. Wouterloot;J. Yates;M. Zhu
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作者：
D. Rumble;J. Hatchell;R. Gutermuth;H. Kirk;J. Buckle;S. Beaulieu;D. Berry;H. Broekhoven-Fiene;M. Currie;M. Fich;T. Jenness;D. Johnstone;D. Johnstone;J. Mottram;D. Nutter;K. Pattle;J. E. Pineda;J. E. Pineda;C. Quinn;C. Salji;S. Tisi;S. Walker-Smith;J. D. Francesco;J. D. Francesco;M. Hogerheijde;D. Ward-Thompson;Lori Allen;L. Cieza;M. Dunham;P. Harvey;K. Stapelfeldt;P. Bastien;H. Butner;M. C. Chen;A. Chrysostomou;S. Coudé;C. Davis;E. Drabek-Maunder;A. Duarte-Cabral;J. Fiege;P. Friberg;R. Friesen;G. Fuller;S. Graves;J. Greaves;J. Gregson;J. Gregson;W. Holland;W. Holland;G. Joncas;J. Kirk;L. Knee;S. Mairs;K. Marsh;B. Matthews;B. Matthews;G. Moriarty-Schieven;J. Rawlings;J. Richer;D. Robertson;E. Rosolowsky;S. Sadavoy;H. Thomas;N. Tothill;S. Viti;G. White;G. White;C. Wilson;J. Wouterloot;J. Yates;M. Zhu
我们介绍了SCUBA-2对巨蛇座MWC 297区域的450和850 μ m观测，这是詹姆斯·克拉克麦克斯韦望远镜（JCMT）古尔德带巡天附近恒星形成区域的一部分。模拟表明，辐射反馈影响的星星的形成过程，我们调查的观测证据，这是通过构建温度图。图是由SCUBA-2通量的关系和JCMT光束的双分量模型导出的，其沙尘不透明度光谱指数β = 1.8。在B1.5 Ve Herbig星星MWC 297的40弧秒内，亚毫米通量被光谱指数为1.03 ± 0.02的自由-自由辐射污染，与超致密H II区和极风/喷流一致。在450 μ m和850 μ m处，污染分别占峰值通量的73 ± 5%和82 ± 4%。在这些波长下，星星的残余热盘几乎无法探测到。在FELLWALKER算法确定的SCUBA-2 850 μ m团块与斯皮策古尔德带巡天探测相吻合的地方，年轻恒星物体（YSO）得到了确认。我们确定了23个天体，并使用Tbol对9个质量为0.09到5.1M的YSO进行了分类。我们发现两个0类，一个0/I类，三个I类和三个II类源。9个YSO的平均温度为15 ± 2K，14个无星团的平均温度为32 ± 4K。我们观测到一个平均温度为46 ± 2 K的异常高温的无星团簇，并得出结论，它是由MWC 297的星星辐射加热的。金斯稳定性提供的证据表明，星星MWC 297的辐射加热可能抑制了团块坍缩。
We present SCUBA-2 450 and 850 μm observations of the Serpens MWC 297 region, part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback influences the star formation process and we investigate observational evidence for this by constructing temperature maps. Maps are derivedfromtheratioofSCUBA-2fluxesandatwo-componentmodeloftheJCMTbeamfora fixed dust opacity spectral index of β = 1.8. Within 40 arcsec of the B1.5Ve Herbig star MWC 297, the submillimetre fluxes are contaminated by free–free emission with a spectral index of 1.03 ± 0.02, consistent with an ultracompact H II region and polar winds/jets. Contamination accounts for 73 ± 5 per cent and 82 ± 4 per cent of peak flux at 450 μm and 850 μm, respectively. The residual thermal disc of the star is almost undetectable at these wavelengths. Young stellar objects (YSOs) are confirmed where SCUBA-2 850 μm clumps identified by the FELLWALKER algorithm coincide with Spitzer Gould Belt Survey detections. We identify 23 objects and use Tbol to classify nine YSOs with masses 0.09 to 5.1M� . We find two Class 0, one Class 0/I, three Class I and three Class II sources. The mean temperature is 15 ± 2Kf or the nine YSOs and 32 ± 4 K for the 14 starless clumps. We observe a starless clump with an abnormally high mean temperature of 46 ± 2 K and conclude that it is radiatively heated by the star MWC 297. Jeans stability provides evidence that radiative heating by the star MWC 297 may be suppressing clump collapse.