1995A&A...303L..61C

Query : 1995A&A...303L..61C

1995A&A...303L..61C - Astronomy and Astrophysics, volume 303L61-64 (1995/11-3)

Direct search for O2 in a single molecular cloud.

COMBES F. and WIKLIND T.

Abstract (from CDS):

We report a new sensitive but still negative search for molecular oxygen in interstellar space. We observed a dark molecular cloud at a redshift z=0.685 that allows us to search for the 368 and 424GHz oxygen lines, without being absorbed by atmospheric molecular oxygen. The absorbing cloud is seen in projection onto a background continuum source. Although we detect an optically thick C18O line in absorption in this dark cloud, we fail to detect the 424GHz O2 line in absorption. We confirm that the 02 abundance in the gas phase must be lower than 1.4x10–2 that of CO (at 1σ), a result that has previously been obtained only on average over an entire galaxy. The large spatial resolution provided by absorption measurements allows us to draw this conclusion locally, on a typical dark cloud scale. The best limit at 1σ towards a single galactic dark cloud was up to now O2/CO≤0.07, and we improve this result by a factor 5.

Abstract Copyright: ∼

Journal keyword(s): ISM: general, abundances, molecules - quasars: absorption lines - radio lines: ISM

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 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 603 3

Query : 1995A&A...303L..61C

Basic data :
6C 021803+354230 -- BL Lac
Other object types: otypes_help 		Rad (2014ApJS,7C,...), gam (0FGL,1FGL,...), QSO (2010ApJ,QSO,...), Bla (2009A&A,[MGL2009],...), AGN (2011ApJ,CGRaBS), Bz? (2013ApJS), MIR (WISEA,WISE), BLL ([VV2000b]), Q? (2021MNRAS), AG? (2022ApJS), LeQ (2010A&A), G ([HSN2016]), * (Gaia), NIR (2MASS)
ICRS coord. (ep=J2000) : 		02 21 05.4920852208 +35 56 13.848581904 (Optical) [ 0.6789 0.5596 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		02 18 04.1481859503 +35 42 31.905428591 [ 0.6789 0.5596 90 ]
Gal coord. (ep=J2000) : 		142.6017556453413 -23.4867590680300 [ 0.6789 0.5596 90 ]
Proper motions mas/yr : 		1.268 0.853 [1.042 0.810 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 143572 [~] / z(spectroscopic) 0.68466001749000 [~] / cz 205255.9095376501 [~]
   (MIR) D 2019MNRAS.487.1823L
Morphological type: 		S D ~
Fluxes (7) :
B 20.0 [~] E ~
V 20.0 [~] E ~
R 19.60 [~] D 2008ApJS..175...97H
G 20.089766 [0.007478] C 2020yCat.1350....0G
J 16.893 [0.159] D 2003yCat.2246....0C
H 15.856 [0.123] C 2003yCat.2246....0C
K 14.849 [0.102] C 2003yCat.2246....0C
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Identifiers (73) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

7C 021804.09+354230.00 1FHL J0221.1+3555 MITG J022105+3555 VSOP J0221+3556
B2 0218+357 2FHL J0221.1+3556 MY 021802.8+354235.2 WB 0218+3542
B2 0218+35 3FHL J0221.1+3556 MY 021802.8+355617.1 WISEA J022105.48+355613.7
B2.3 0218+35 FL8Y J0221.1+3556 NRAO 0218+35 WISE J022105.47+355613.7
BWE 0218+3542 1FLE J0221+3604 NVSS J022105+355613 WN B0218.0+3542
6C 021803+354230 GB6 B0218+3542 OHIO D 330 9Y-MST J0221+3556
CGRaBS J0221+3556 87GB 021804.0+354230 QSO B0218+357 [HSN2016] J035.27+35.93
CJ1 0218+357 GRA B0218+35 QSO B0218+3542 [MGL2009] BZU J0221+3556
CJF B0218+357 GRA J0220+35 QSO J0221+3556 [MML2015] 5BZU J0221+3556
CLASS B0218+357 ICRF J022105.4+355613 RORF 0218+357 [VV2000b] J022105.4+355615
CLASS J022105.4705+355613.723 IERS B0218+357 S3 0218+35 [VV2003] J022105.4+355615
CLASS J022105.4679+355613.737 IVS B0218+357 S4 0218+357 [VV2006] J022105.4+355615
CLASS J022105.4679+355613.723 JVAS B0218+357 S4 0218+35 [VV2010] J022105.4+355615
CRATES J022105+355613 JVAS J0221+359 TeV J0218+359 [VV96] J022105.4+355615
0FGL J0220.9+3607 JVAS J0221+3556 TGSSADR J022105.3+355612 [VV98] J022105.4+355615
1FGL J0221.0+3555 1Jy 0218+35 TIC 129790256 Gaia DR3 328069053976561536
2FGL J0221.0+3555 1Jy 0218+357 TXS 0218+357
3FGL J0221.1+3556 2MASS J02210547+3556137 VLSSr J022105.6+355612
4FGL J0221.1+3556 MITG J0221+3555 VLSS J0221.0+3556

References (603 between 1850 and 2026) (Total 603)
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Collections of Measurements Description of Measurements

Velocities : 4    PM : 1   

   

Observing logs
Herschel : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 6C 021803+354230

Link by name to the catalogue in VizieR :

BWE 0218+3542 IERS B0218+357 2MASS J02210547+3556137 MITG J0221+3555 MITG J022105+3555
NVSS J022105+355613 VSOP J0221+3556 WISEA J022105.48+355613.7 WISE J022105.47+355613.7 WN B0218.0+3542
Gaia DR3 328069053976561536

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