Molecular Line Data for Modelling Planetary
and Cool Star Atmospheres
This page provides access to molecular spectral line data for the
visible and infrared spectral region available on the web. The data has
been collected for the VSTAR (Versatile
Software for Transfer of
Atmospheric Radiation) project at the University of New South Wales,
Sydney. Molecular line data described here is all freely available on
the web (some sites require registration to access data).
If you know of other data that should be included here, please contact
me: j.bailey -at- unsw.edu.au
Molecular Line Lists –
are web sites providing molecular spectral line lists
available for download.
– The HITRAN (HIgh resolution TRANsmission) is a
compilation of spectral line data maintained at the Atomic and
Molecular Physics Division of the Harvard-Smithsonian Center for
Astrophysics under the direction of Dr. Laurence S. Rothman. It is a
development of the AFCRL project originally dating from the 1960s. The
latest edition is HITRAN 2008 containing 2,713,968 lines of 39
molecules. The database is primarily designed for Earth atmosphere
applications. Registration is required to access the line data.
– High temperature line database developed in association with
HITRAN. Includes line lists for H2O, CO2, CO, OH
The GEISA (Gestion et Etude des Informations Spectroscopiques
Atmosphériques) is a compilation similar to HITRAN (in many
cases based on the same sources of data) maintained at the LMD
(Laboratoire de Météorologie Dynamique, France) under the
direction of Dr Nicole Jacquinet-Husson. The latest edition is GEISA
2009 containing 3,807,997 lines of 50 molecules.
Kurucz – The web site of
Robert L. Kurucz at Harvard-Smithsonian Centre for Astrophysics. Here
you will find versions of the Partridge & Schwenke H2O
line list, the Schwenke TiO list (also known as the AMES lists)
and a range of other molecular and atomic line lists. Also contains
software including the ATLAS9 stellar atmosphere code. Alternative link
CDSD – The Carbon Dioxide
Spectroscopic Databank at the V.E.
of Atmospheric Optics of the Siberian Branch of the
Russian Academy of Sciences, Tomsk. Includes several CO2
line lists for different temperatures, CDSD-296 (419,610 lines for
296K), CDSD-1000 (3,950,553 lines for 1000K), and CDSD-Venus
(11,730,277 lines for 750K with a deeper cutoff).
SCAN (Go to ftp://stella.nbi.dk) Database of molecular
line data due to Uffe Grae
Jorgensen at the Niels Bohr Institute, Copenhagen. Includes line
lists for H2O (100 million lines), TiO, CH, CN and C2.
Low Temperature Methane (CH4) line data is
described on a separate page. This includes recent laboratory data that
provides great improvments over the HITRAN 2008 data in the 1.3 to 1.8
JPL MkIV FTIR Group
– Spectroscopy data on this site includes line data for H2O
and N2O due to Robert Toth, and "pseudoline" data for
various atmospheric absorbers and collision induced absorptions
compiled by Geoffrey Toon et al.
Tools that provide access to data on individual bands,
lines etc. or enable the plotting of spectra.
SPECTRA Infromation System – At the Institute of Atmospheric
Optics, Tomsk. This tool provides interactive acces to data from line
lists including HITRAN, GEISA, HITEMP, CDSD, allowing the investigation
of individual bands and isotopologues and the plotting of spectra.
spectrafactory – A
database of synthetic spectra generated from molecular line lists at
the resolution of various astronomical instruments. Over half a million
model spectra for 39 molecules are included (See: Cami et al.,
2010, ApJS, 187, 409).
Molecular Spectroscopic Database – Data on molecular lines compiled
by the NASA Astrobiology Institute's Virtual Planetary Laboratory team.
Includes an interactive line list plotting tool.
Tools available for download that can be used to generate
molecular spectral line lists.
Spherical Top Data System (Wenger & Champion, 1998,
JQSRT, 59, 471) can be used to generate line lists (in HITRAN 2004
format) for spherical top molecules with XY4 structures such
as methane (CH4) and many similar molecules. Developed by
the Institut Carnot de Bourgogne Spectroscopie Moleculaire et
This program developed by Dr Colin Western at University of Bristol can
be used for fitting or simulating spectra of a range of molecules
including linear molecules, symmetric tops and asymmetric tops.