What's new?

The database is described in

H. S. P. Müller, F. Schlöder, J. Stutzki, and G. Winnewisser, J. Mol. Struct. 742, 215–227 (2005)

and in

H. S. P. Müller, S. Thorwirth, D. A. Roth, and G. Winnewisser, Astronomy and Astrophysics 370, L49–L52 (2001).

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.

• Apr. 2019: syn-C₂H₃SH; anti-C₂H₃SH.
• Mar. 2019: H₂N¹³CN; H₂¹⁵NCN; H₂NC¹⁵N; FeN; CrO; CrN; CrF; CrCl; Cr³⁷Cl; CrH.
• Mar. 2019: Updated CDMS links in several arXiv versions of manuscripts and made some available newly. The same applies to the Cologne Stectroscopy Data section.
• Feb. 2019: FeO Ω = 4; FeO Ω = 3; FeO Ω = 2; ⁵⁴FeO Ω = 4; ⁵⁴FeO Ω = 3; ⁵⁴FeO Ω = 2.
• Jan. 2019: AlF, v = 0 − 5; ²⁶AlF, v = 0 − 2; p-c-SiC₃; HSCO⁺; DSCO⁺.
• Dec. 2018: HFS data for H₂CO were extended to include R-branch transitions with J up to 5 and K_a = 1.
• Nov. 2018: E-HNCHCN; Z-HNCHCN; cyanooxirane; HCCCH₂CN; CH₃OCH₂CHO.
• Oct./Nov. 2018: Several outdated links were corrected.
• Oct. 2018: c-C₆H₅CCH; H₂NNC.
• Sep. 2018: Corrected K_a designation of E levels of methanol; “≤” now reads “≥” and “>” now reads “<”.
• Aug. 2018: 3-methylanti- and -gauchebutyronitrile; CH₃NC; NaS; KS; ¹⁵NH; CH₃D; the CH₃CNO entry is available with separated A₁ / A₂ lines.
• July 2018: i-C₃H₇¹³CN; (CH₃)₂¹³CHCN; ¹³CH₃(CH₃)CHCN; AlSH; NaSH; MgSH; CaSH; KSH.

• 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.

• 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 gup larger than 999.
• Dec. 2015: new molecule group: cyclic species.

• 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.

• Mar. 2019: added HONO with documentation, updated methyl formate entry.
• Jan. 2019: updated entries for H₂CCO, HCOOH, CH₃CHO, C₂H₅OH, cyanomethanimine, HNCCN⁺, CH₃CN and H₂NCHO.
• Oct. 2018: updated SiO documentation.
• Aug. 2018: added documentation for CH₃NC, updated those on H₂S and CH₃CN.
• July 2018: added CNCN and potential identification of C₅S with documentations.

• June 2017: added NO files with FTIR data.
• Apr. 2016: added ethanethiol files.
• Jan. 2016: updated OH⁺.

• Mar. 2019: Added cyanamide and vinyl mercaptan files as well as those of the gauche-conformers of 2-cyanobutane. Updated CDMS links in several arXiv versions of manuscripts and made some available newly. The same applies to the Catalog Archive.
• Jan. 2019: Added CH₃SD and H₂CS files.
• Aug. 2018: Added 3-methylbutyronitrile files.
• Feb. 2018: Added CHD₂⁺ files.
• Jan. 2018: Added extended HD₂⁺ files (plus one line, basis of the new entry) as well as alternative fits. Added also propanal files.