2007A&A...466..999L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST10:41:41

2007A&A...466..999L - Astronomy and Astrophysics, volume 466, 999-1003 (2007/5-2)

Molecular oxygen in the ρ Ophiuchi cloud.

LARSSON B., LISEAU R., PAGANI L., BERGMAN P., BERNATH P., BIVER N., BLACK J.H., BOOTH R.S., BUAT V., CROVISIER J., CURRY C.L., DAHLGREN M., ENCRENAZ P.J., FALGARONE E., FELDMAN P.A., FICH M., FLOREN H.G., FREDRIXON M., FRISK U., GAHM G.F., GERIN M., HAGSTROEM M., HARJU J., HASEGAWA T., HJALMARSON A., JOHANSSON L.E.B., JUSTTANONT K., KLOTZ A., KYROELAE E., KWOK S., LECACHEUX A., LILJESTROEM T., LLEWELLYN E.J., LUNDIN S., MEGIE G., MITCHELL G.F., MURTAGH D., NORDH L.H., NYMAN L.-A., OLBERG M., OLOFSSON A.O.H., OLOFSSON G., OLOFSSON H., PERSSON G., PLUME R., RICKMAN H., RISTORCELLI I., RYDBECK G., SANDQVIST A.A., SCHEELE F.V., SERRA G., TORCHINSKY S., TOTHILL N.F., VOLK K., WIKLIND T., WILSON C.D., WINNBERG A. and WITT G.

Abstract (from CDS):

Molecular oxygen, O2, has been expected historically to be an abundant component of the chemical species in molecular clouds and, as such, an important coolant of the dense interstellar medium. However, a number of attempts from both ground and from space have failed to detect O2 emission. The work described here uses heterodyne spectroscopy from space to search for molecular oxygen in the interstellar medium. The Odin satellite carries a 1.1m sub-millimeter dish and a dedicated 119GHz receiver for the ground state line of O2. Starting in 2002, the star forming molecular cloud core ρ Oph A was observed with Odin for 34 days during several observing runs. We detect a spectral line at vLSR=+3.5km/s with ΔvFWHM=1.5km/s, parameters which are also common to other species associated with ρ Oph A. This feature is identified as the O2 (NJ = 11 - 10) transition at 118750.343MHz. The abundance of molecular oxygen, relative to H2, is 5x10–8 averaged over the Odin beam. This abundance is consistently lower than previously reported upper limits.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: ρ Oph A - ISM: clouds - ISM: molecules - ISM: abundances - stars: formation - radio lines: ISM

CDS comments: Fig.1 SMM 16267 is [WAF99] SMM J16267-2417 in Simbad. Sources EL27 and S1 not identified in Simbad.

Simbad objects: 9

goto Full paper

goto View the reference in ADS

Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * rho Oph A * 16 25 35.142 -23 26 49.90 4.3 5.22 5.05     B2/3V 379 0
2 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 69 1
3 [JJK2008] SMM J162622-24225 smm 16 26 21.60 -24 22 54.8           ~ 40 0
4 [CHG85] GSS 30 IRS 3 Y*O 16 26 21.77376 -24 22 51.3948           ~ 53 0
5 NAME rho Oph A Cloud MoC 16 26 26.4 -24 22 33           ~ 235 1
6 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 365 0
7 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
8 NAME SMM J16267-2417 smm 16 26 43.5 -24 17 26           ~ 8 0
9 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2926 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2007A&A...466..999L and select 'bookmark this link' or equivalent in the popup menu


2019.10.16-10:41:41

© Université de Strasbourg/CNRS

    • Contact