Herschelobservations in the ultracompact HII region Mon R2
نویسندگان
چکیده
منابع مشابه
Detection of reactive ions in the ultracompact Hii regions Mon R 2 and G 29 . 96 - 0 . 02
We report the first detection of the reactive ions CO + and HOC + towards ultracompact (UC) Hii regions, particularly in Mon R2 and G29.96-0.02. We have observed two positions in Mon R2, namely the peak of the UC Hii region and the surrounding high density molecular cloud. CO + and HOC + were detected at the UC Hii region but not at the molecular cloud, as expected if both ions arise in the PDR...
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A survey of ultracompact (UC) HII regions has been carried out by searching for 6.669GHz methanol maser emission from a sample of 535 IRAS selected candidates. A total of 201 candidates exhibit methanol emission. These sources have been used, in conjunction with previously identiied UC HII regions, to provide a base for further studies of such regions. Estimates of distances have indicated that...
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We present a survey in the 6 16 − 5 23 rotational H 2 O transition toward 33 galactic ultracompact HII regions. Maser emission is detected toward 18 of these sources; two are new detections. High quality spectra are provided for all 18 sources. We discuss the detection rate of this survey and the correlation of various maser properties with other physical parameters. In addition, we report wide...
متن کاملThe environs of the ultracompact HII region G 45 . 45 + 0 . 06
Aims. G45.45+0.06 is an ultra-compact HII (UCHII) region extensively studied. It is known that G45.45+0.06 is embedded in a complex of UCHII regions, but up the date, the surrounding ISM in a larger spatial scale has not been analyzed. Methods. Using data from large-scale surveys: Two Micron All Sky Survey, GLIMPSE, MIPSGAL, MAGPIS and GRS, we performed a multiwavelength study of a region about...
متن کاملNear Infrared Spectroscopy of the Ultracompact HII Region G 45 . 12 + 0 . 13
We present complete, low resolution IJHK spectroscopy of the ultracompact HII region, G45.12+0.13. From the observed HI line strengths, we derive a near infrared extinction law that is slightly steeper than the average. After correction with this extinction law, we find good agreement between the observed line ratios of HeI, Fe, Fe, S and S and the available atomic data. Our data show that the ...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201015093