Catalog Service: Molecular DNM in Chamaeleon CO spectra
Description
To determine carbon monoxide column densities along sightlines through the Chamaeleon cloud complex where molecular absorption had been observed but CO emission had not been detected. We took ^12^CO J=1-0 absorption profiles toward 6 of 8 members of a group of sightlines in Chamaeleon having abundant dark neutral matter and molecular hydrogen but no detectable CO emission. CO absorption was detected along five of the six sightlines at column densities 4x10^+13^cm^-2^<~N(CO)<~10^15^cm^-2^ that are below typical survey detection limits of 1-2K-km/s. Dark gas absent in CO emission along sightlines in the outskirts of the Chamaeleon complex where molecular gas is readily detected in HCO^+^ absorption results from small CO column densities around the onset of CO formation at the HI/H_2_ transition. Relative abundances N(CO)/H_2_<3x10^-6^ in Chamaeleon are comparable to those seen in UV absorption toward early-type stars and in a CO absorption/emission line survey toward local quasar background targets away from the Galactic plane.
This section describes who is responsible for this resource
Publisher: CDSivo://CDS[Pub. ID]
Contact Information:
This section provides some status information: the resource version, availability, and relevant dates.
This resource was registered on: 2019 Jul 05 07:54:37ZThis resource description was last updated on: 2021 Oct 21 00:00:00Z
This section describes what the resource is, what it contains, and how it might be relevant.
Related Resources:
This section describes the data's coverage over the sky, frequency, and time.
Wavebands covered:
This section describes the rights and usage information for this data.
This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.
This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data.
This is a standard IVOA service that takes as input a position in the sky and a radius and returns catalog records with positions within that radius.
Cone search capability for table J/A+A/627/A95/table1 (Sightline and velocity-integrated spectral line properties)
VERB=1
VERB=3
Developed with the support of the National Science Foundation under Cooperative Agreement AST0122449 with the Johns Hopkins University The NAVO project is a member of the International Virtual Observatory Alliance
This NAVO Application is hosted by the Space Telescope Science Institute