2004ApJ...614..252Y

Query : 2004ApJ...614..252Y

2004ApJ...614..252Y - Astrophys. J., 614, 252-266 (2004/October-2)

Probing pre-protostellar cores with formaldehyde.

YOUNG K.E., LEE J.-E., EVANS II N.J., GOLDSMITH P.F. and DOTY S.D.

Abstract (from CDS):

We present maps of the 6 cm and 1.3 mm transitions of H2CO toward three cold, dense pre-protostellar cores (PPCs): L1498, L1512, and L1544. The 6 cm transition is a unique probe of high-density gas at low temperature. However, our models unequivocally indicate that H2CO is depleted in the interiors of PPCs, and depletion significantly affects how H2CO probes the earliest stages of star formation. Multistage, self-consistent models, including gas-dust energetics, of both H2CO transitions are presented, and the implications of the results are discussed.

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Journal keyword(s): Astrochemistry - ISM: Clouds - ISM: Individual: Alphanumeric: L1498 - ISM: Individual: Alphanumeric: L1512 - ISM: Individual: Alphanumeric: L1544 - ISM: Molecules - Radio Lines: ISM - Stars: Formation

Simbad objects: 8

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Number of rows : 8
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 NAME [BM89] L1498 PoC 04 10 51.4 +25 09 58           ~ 187 0
2 LDN 1498 DNe 04 11.0 +24 58           ~ 306 0
3 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 184 0
4 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
5 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
6 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
7 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
8 LDN 663 DNe 19 36 55 +07 34.4           ~ 698 0

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