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Resource Record Summary

Catalog Service:
HNCO, CH3CN and HCOOCH3 partition functions

Short name: J/A+A/627/A65
IVOA Identifier: ivo://CDS.VizieR/J/A+A/627/A65
DOI (Digital Object Identifier): 10.26093/cds/vizier.36270065
Publisher: CDSivo://CDS[Pub. ID]
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A65
VO Compliance: Level 2: This is a VO-compliant resource.
Status: active
Registered: 2019 Jul 01 07:15:43Z
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Description


We emphasize that the completeness of the partition function, i.e. the use of a converged partition function at the typical temperature range of the survey, is very important to decrease the uncertainty on this quantity and thus to derive reliable interstellar molecular densities. In that context, we will show how the use of different approximations for the rovibrational partition function together with some interpolation and/or extrapolation procedures may affect the estimate of the interstellar molecular column density. For that purpose, we will apply the partition function calculations to astronomical observations performed with the IRAM-30m telescope towards the NGC7538-IRS1 source of the two following N-bearing molecules: isocyanic acid (HNCO, a quasilinear molecule) and methyl cyanide (CH_3_CN, a symmetric top molecule). The case of methyl formate (HCOOCH_3_), which is an asymmetric top O-bearing molecule which contains an internal rotor will also be discussed. Our analysis shows that the use of different partition function approximations leads to relative differences in the resulting column densities in the range of 9% up to 43%. Thus, we expect that this work turns out to be relevant for surveys of sources with temperatures higher than 300 K and to observations in the infrared.

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About the Resource Providers

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Publisher: CDSivo://CDS[Pub. ID]

Creators:
Carvajal M.Favre C.Kleiner I.Ceccarelli C.Bergin E.A.Fedele D.

Contact Information:
X CDS support team
Email: cds-question at unistra.fr
Address: CDS
Observatoire de Strasbourg
11 rue de l'Universite
F-67000 Strasbourg
France

Status of This Resource

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Version: n/a
Availability: This is an active resource.
  • This service provides only public data.
Relevant dates for this Resource:
  • Updated: 2019 Sep 03 14:46:38Z
  • Created: 2019 Jul 01 07:15:43Z

This resource was registered on: 2019 Jul 01 07:15:43Z
This resource description was last updated on: 2021 Oct 21 00:00:00Z

What This Resource is About

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Resource Class: CatalogService
This resource is a service that provides access to catalog data. You can extract data from the catalog by issuing a query, and the matching data is returned as a table.
Resource type keywords:
  • Catalog
Subject keywords:
  • Atomic physics
Intended audience or use:
  • Research: This resource provides information appropriate for supporting scientific research.
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A65 Literature Reference: 2019A&A...627A..65C

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TAP VizieR generic service(IsServedBy) ivo://CDS.VizieR/TAP [Res. ID]

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Custom Service

This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for this service interface:
Custom Service

This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for this service interface:
  • URL-based interface: http://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A65
Table Access Protocol - Auxiliary ServiceXX

This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for the standard interface:
  • http://tapvizier.cds.unistra.fr/TAPVizieR/tap


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

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