SIMBAD references

2002A&A...395..663T - Astronomy and Astrophysics, volume 395, 663-667 (2002/11-4)

Extending the limits of globule detection. ISOPHOT Serendipity Survey observations of interstellar clouds II.

TOTH L.V., KISS C., JUVELA M., STICKEL M., LISENFELD U. and HOTZEL S.

Abstract (from CDS):

Small isolated clouds were discovered by the ISOPHOT 170µm Serendipity Survey (ISOSS) as faint I170<13MJy/sr FIR sources. One of them is ISOSS J20246+6540, a cold (Td≃14.5K) pointlike ISOSS source without an IRAS pointsource counterpart. In the Digitized Sky Survey B band it is seen as a 3'size bipolar nebulosity with an average excess DSS blue band surface brightness of 8% of the background's photographical density. The CO column density distribution determined by multi-isotopic, multi-level CO measurements with the IRAM-30m telescope agrees well with the optical appearance. An average hydrogen column density of ≃1021cm–2 was derived from both the FIR and CO data. Using a kinematic distance estimate of 400pc the NLTE modelling of the CO, HCO+, and CS measurements gives a peak density of ≃104cm–3. The multiwavelength data characterise ISOSS J20246+6540 as a representative of a class of globules which has not been discovered so far due to their small angular size and low 100µm brightness. A significant overabundance of 13CO is found X(13CO)≥150xX(C18O). This is likely due to isotope selective chemical processes.

Abstract Copyright:

Journal keyword(s): ISM: clouds - dust, extinction - ISM: molecules - Infrared: ISM: - Surveys

CDS comments: YDM 97(*): unnumbered peak in YDM97, not in SIMBAD.

Simbad objects: 23

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2019.12.07-20:39:17

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