2006A&A...449.1089V


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.02CET12:05:28

2006A&A...449.1089V - Astronomy and Astrophysics, volume 449, 1089-1100 (2006/4-3)

An observational survey of molecular emission ahead of Herbig-Haro objects.

VITI S., GIRART J.M. and HATCHELL J.

Abstract (from CDS):

A molecular survey recently performed ahead of HH 2 supports the idea that the observed molecular enhancement is due to UV radiation from the HH object. The aim of the present work is to determine whether all HH objects with enhanced HCO+ emission ahead of them also exhibit the same enhanced chemistry as HH 2. We thus observed several molecular lines at several positions ahead of five Herbig-Haro objects where enhanced HCO+ emission was previously observed. We mapped the five Herbig-Haro objects using the IRAM-30m. For each position we searched for more than one molecular species, and where possible for more than one transition per species. We then estimated the averaged beam column densities for all species observed and also performed LVG analyses to constrain the physical properties of the gas. The chemically richest quiescent gas is found ahead of the HH 7-11 complex, in particular at the HH 7-11 A position. In some regions we also detected a high velocity gas component. We find that the gas densities are always higher than those typical of a molecular cloud while the derived temperatures are always quite low, ranging from 10 to 25K. The emission of most species seems to be enhanced with respect to that of a typical dense clump, probably due to the exposure to a high UV radiation from the HH objects. Chemical differentiation among the positions is also observed. We attempt a very simple chemical analysis to explain such differentiation.

Abstract Copyright:

Journal keyword(s): ISM: Herbig-Haro objects - ISM: abundances - ISM: clouds - ISM: molecules - radio lines: ISM - stars: formation

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LBN 119.83-06.05 MoC 00 28 43.5075 +56 41 56.868           ~ 65 0
2 NAME HH 7-11(B) Mas 03 29 02.1 +31 15 38           ~ 8 0
3 HH 11 HH 03 29 03 +31 15.8           ~ 151 1
4 V* V512 Per Or* 03 29 03.7567945196 +31 16 03.959183877           ~ 353 0
5 NAME HH 7-11 FIR 03 29 03.9 +31 16 06           ~ 334 0
6 HH 10 HH 03 29 05.456 +31 15 45.32           ~ 139 1
7 NAME HH 7/11X ? 03 29 05.7 +31 15 30           ~ 1 0
8 ASR 6 Y*O 03 29 06.425 +31 15 34.86           ~ 155 1
9 HH 9 HH 03 29 06.5 +31 15 53           ~ 107 1
10 2MASS J03290842+3115284 IR 03 29 08.420 +31 15 28.48           ~ 226 1
11 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 706 0
12 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 434 1
13 LDN 1554 DNe 05 20.0 +26 13           ~ 12 0
14 M 42 HII 05 35 17.3 -05 23 28           ~ 3756 0
15 HH 34E HH 05 35 30.6 -06 29 04           ~ 11 0
16 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 470 2
17 HH 34D HH 05 35 32.0 -06 29 24           ~ 6 0
18 HH 34C HH 05 35 32.2 -06 29 05           ~ 7 0
19 HH 34A HH 05 35 34.3 -06 29 07           ~ 10 0
20 HH 1 HH 05 36 20.8 -06 45 13           ~ 401 1
21 HH 2 HH 05 36.4 -06 47           ~ 335 1
22 NAME Ori A MoC 05 38 -07.1           ~ 2707 0
23 LDN 1641 MoC 05 39.0 -07 00           ~ 430 0
24 NGC 2071 RNe 05 47 10 +00 18.0           ~ 611 1
25 NAME Mon OB1 G PoC 06 41 12 +09 55.6           ~ 107 0
26 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 493 0
27 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 115 0
28 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 182 1

    Equat.    Gal    SGal    Ecl

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2020.12.02-12:05:28

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