2007ApJ...657..838S

Query : 2007ApJ...657..838S

2007ApJ...657..838S - Astrophys. J., 657, 838-848 (2007/March-2)

The effect of noise in dust emission maps on the derivation of column density, temperature, and emissivity spectral index.

SCHNEE S., KAUFFMANN J., GOODMAN A. and BERTOLDI F.

Abstract (from CDS):

We have mapped the central 10'x10' of the dense core TMC-1C at 450, 850, and 1200 µm using SCUBA on the James Clerk Maxwell Telescope and MAMBO on the IRAM 30 m telescope. We show that although one can, in principle, use images at these wavelengths to map the emissivity spectral index, temperature, and column density independently, noise and calibration errors would have to be less than ∼2% to accurately derive these three quantities from a set of three emission maps. Because our data are not this free of errors, we use our emission maps to fit the dust temperature and column density assuming a constant value of the emissivity spectral index and explore the effects of noise on the derived physical parameters. We find that the derived extinction values for TMC-1C are large for a starless core (∼80 mag AV) and the derived temperatures are low (∼6 K) in the densest regions of the core, using our derived value of β=1.8.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Stars: Formation - Submillimeter

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 Barnard 220 DNe 04 41 38.8 +26 00 42           ~ 141 0

Query : 2007ApJ...657..838S

Basic data :
Barnard 220 -- Dark Cloud (nebula)
Other object types: otypes_help 		PoC (MLB,[BM89],...), MoC (TMC), DNe (Barnard)
ICRS coord. (ep=J2000) : 		04 41 38.8 +26 00 42 [ ] D 1989ApJS...71...89B
FK4 coord. (ep=B1950 eq=1950) : 		04 38 34.5 +25 55 00 [ ]
Gal coord. (ep=J2000) : 		174.1133 -13.2478 [ ]
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Hierarchy : number of linked objects
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: 3 		Display criteria :

Identifiers (5) :
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Barnard 220 TMC-1C [THL2004] TMC-1 CPa
MLB 3-27 [BM89] 1-47

References (141 between 1850 and 2026) (Total 141)
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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