1996A&A...315L.317L

Query : 1996A&A...315L.317L

1996A&A...315L.317L - Astronomy and Astrophysics, volume 315L317-320 (1996/11-2)

Very cold dust associated with molecular gas.

LAUREIJS R.J., HAIKALA L., BURGDORF M., CLARK F.O., LILJESTROEM T., MATTILA K. and PRUSTI T.

Abstract (from CDS):

We report the detection of very cold dust in a small and isolated dust cloud. Observations at 60, 90, 135, and 200µm show a constant surface brightness ratio I135/I200 and a flattening of I90/I200 towards the cloud centre. The dust temperature derived from the far-infrared colours can be confined to the range of 12-15K assuming a λ–2 dust emissivity. The 60µm emission comes mainly from outer dust layers surrounding the core. We infer that a fraction of the power in the 90µm band comes from the warmer grain component also causing I60. This fraction is approximately equal to the total power in the 60µm band. The cloud is also detected in 12CO, 13CO, CO18, HCO+ and CS. The detections indicate that the dust emission is associated with a molecular cloud core where n(H2) ≥3x104cm–3. Using the column density derived from the molecular observations we find an extinction cross section per H-atom of 4.1-9.5cm2/H-atom.

Abstract Copyright: ∼

Journal keyword(s): interstellar medium: dust, extinction - interstellar medium: clouds - interstellar medium: molecules

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TGU H1870 DNe 12 16 22 -79 17.2           ~ 5 0

Query : 1996A&A...315L.317L

Basic data :
TGU H1870 -- Dark Cloud (nebula)
Other object types: otypes_help 		DNe (2005PASJ), Cld (TGU), ISM (FEST)
ICRS coord. (ep=J2000) : 		12 16 22.0 -79 17 12 [ ] E 1996A&A...315L.317L
FK4 coord. (ep=B1950 eq=1950) : 		12 13 25.6 -79 00 32 [ ]
Gal coord. (ep=J2000) : 		301.2381 -16.5304 [ ]
Angular size (arcmin): 		22.2 34.2 90 (Opt) D 2005PASJ...57S...1D
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Hierarchy : number of linked objects
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Identifiers (2) :
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FEST 2-137 TGU H1870

References (5 between 1850 and 2026) (Total 5)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Observing logs

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