new [CDMS classic documentation]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== What's new? ======

[[archive|And what is not quite so new anymore?]]

The database is described in
<alert type="info">
H. S. P. Müller, F. Schlöder, J. Stutzki, and G. Winnewisser, J. Mol. Struct. 742, 215–227 (2005)
</alert>
and in
<alert type="Info">
H. S. P. Müller, S. Thorwirth, D. A. Roth, and G. Winnewisser, Astronomy and Astrophysics 370, L49–L52 (2001).
</alert>
Please acknowledge use of the CDMS by citing these article. You are very welcome to state the web
address also. We recommend to cite the original sources of the data too, which are given in the
documentations, at least as far as this is feasible.
===== Recent Catalog Entries =====

[[archive#less_recent_catalog_entries|Earlier Catalog Entries]]

  * Feb. 2021: //c//-H<sub>2</sub>C<sub>3</sub>O; //c//-HDC<sub>3</sub>O; //c//-H<sub>2</sub>C<sub>2</sub><sup>13</sup>CO; //c//-H<sub>2</sub><sup>13</sup>CCCO; //c//-H<sub>2</sub>C<sub>3</sub><sup>18</sup>O; //c//-D<sub>2</sub>C<sub>3</sub>O. 
  * Dec. 2020: HOCH<sub>2</sub>C(O)NH<sub>2</sub>; NH<sub>3</sub>, //v// = 0 with HFS; CH<sub>2</sub>OH.
  * Oct. 2020: HC<sub>4</sub>NC; HC<sub>6</sub>NC; HC(S)NH<sub>2</sub>; HC<sub>3</sub>O<sup>+</sup>; aminoacetonitrile, //v// = 0; aminoacetonitrile, //v//<sub>11</sub> + //v//<sub>18</sub> = 1; aminoacetonitrile, //v//<sub>17</sub> = 1; butadiynyliminomethylium.
  * Sep. 2020: CH<sub>2</sub>D<sup>37</sup>Cl; HCCCH<sub>2</sub>CN; CH<sub>3</sub>ONH<sub>2</sub>.
  * Aug. 2020: HC<sub>7</sub>N, //v// = 0; HC<sub>5</sub>N, //v// = 0; CH<sub>3</sub>OCH<sub>2</sub>OH; CH<sub>3</sub>OCN; C<sub>2</sub>H<sub>5</sub>NCO; CH<sub>2</sub>DCl. 
  * July 2020: CD<sub>3</sub>CN; CH<sub>3</sub><sup>13</sup>CHO, //v//<sub>t</sub> ≤ 1; <sup>13</sup>CH<sub>3</sub>CHO, //v//<sub>t</sub> ≤ 1; HC<sub>9</sub>N, //v// = 0; DC<sub>9</sub>N; H<sup>13</sup>CC<sub>8</sub>N; HC<sup>13</sup>CC<sub>7</sub>N; HC<sub>2</sub><sup>13</sup>CC<sub>6</sub>N; HC<sub>3</sub><sup>13</sup>CC<sub>5</sub>N; HC<sub>4</sub><sup>13</sup>CC<sub>4</sub>N; HC<sub>5</sub><sup>13</sup>CC<sub>3</sub>N; HC<sub>6</sub><sup>13</sup>CC<sub>2</sub>N; HC<sub>7</sub><sup>13</sup>CCN; HC<sub>8</sub><sup>13</sup>CN; HC<sub>9</sub><sup>15</sup>N.

===== General Section and General Remarks =====

  * Mar. 2019: The program of the VAMDC-CDMS was updated. The Classic or ascii-CDMS was moved to this server. Links have been corrected and should work, but a detailed check is pending. The coding of special characters has been adjusted.
  * Nov. 2009: added note in the link which explains the aggregate spin number.

===== Catalog Search Form =====

[[archive#catalog_search_form|Archive "Catalog Search Form"]]

  * Dec. 2018: A new group was defined: ISM, molecules detected in the interstellar medium, but not in circumstellar shells of late-type stars.
  * Nov. 2018: A bug in the calculation of A values was fixed. This affected transitions with //g//<sub>up</sub> larger than 999.
  * Dec. 2015: new molecule group: cyclic species.

===== Partition Functions =====

  * Apr. 2010: started to add values at 2.725 and 5 K for some species. The log values are also displayed in the partition function table.

===== Molecules in Space =====

[[archive#molecules_in_space|Archive "Molecules in Space"]]

  * Feb. 2021: updated propenal and propene entries.
  * Dec. 2020: updated AlO, TiO, and acetic acid entries.
  * Nov. 2020: updated HCCNC, HNC<sub>3</sub>, and urea entries.
  * Oct. 2020: added HC<sub>4</sub>NC, 3-butynenitrile, ethynyloxomethylium, and butadiynyliminomethylium with documentations; updated acetamide documentation; modified iminomethylium entry.
  * Sep. 2020: updated C<sub>3</sub>N<sup>−</sup> and C<sub>5</sub>N<sup>−</sup> documentations, and modified that of C<sub>5</sub>S.
  * Aug. 2020: added iminopropyne, hydroxylamine, and hydroxypropanone with documentations; updated CH<sub>3</sub>NH<sub>2</sub>, HC<sub>7</sub>N, and HC<sub>9</sub>N documentations.

===== Fitting Spectra =====

[[archive#fitting_spectra|Archive "Fitting Spectra"]]

  * Dec. 2020: added aminoacetonitrile example.
  * Nov. 2020: added hydroxymethyl data.
  * June 2017: added NO files with FTIR data.
  * Apr. 2016: added ethanethiol files.
  * Jan. 2016: updated OH<sup>+</sup>.

===== Cologne Spectroscopy Data =====

[[archive#cologne_spectroscopy_data|Archive "Cologne Spectroscopy Data"]]

  * Feb. 2021: added cyclopropenone files.
  * Sep. 2020: the new //n//-propyl cyanide files are now available.
  * Aug. 2020: HC<sub>5</sub>N and HC<sub>7</sub>N files are available with catalog files and others.
  * Apr. 2020: Propyne files are available with catalog files and others.