\documentstyle{preprint}
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\begin{document}

\title{A DATABASE FOR GALAXY EVOLUTION MODELING}

\author{Claus~Leitherer,\thanks{Space Telescope Science Institute, 3700 
San Martin Drive, Baltimore, MD 21218; e-mail: leitherer@stsci.edu}}
Danielle~Alloin,\thanks{Service d'Astrophysique, CEA Saclay, F-91191 
Gif-sur-Yvette, France}
Uta~Fritze-v.~Alvensleben,\thanks{Universit\"atssternwarte G\"ottingen, 
Geismarlandstr. 11,  D-37083 G\"ottingen, Germany}
John~S.~Gallagher,\thanks{Dept.\ of Astronomy, Univ.\ of Wisconsin-Madison,
5534 Sterling, 475 North Charter St., Madison, WI 53706}\\
\\
{\it John~P.~Huchra},\thanks{Harvard-Smithsonian Center for Astrophysics, 60 
Garden St., MS20, Cambridge, MA 02138-1516}
{\it Francesca~Matteucci},\thanks{SISSA, Via Beirut 2--4, I-34013 Trieste, Italy}
{\it Robert~W.~O'Connell},\thanks{Univ.\ of Virginia, Dept.\ of Astronomy, P.O.\ 
Box 3818, Univ.\ Station, Charlottesville, VA 22903}
{\it John~E.~Beckman},\thanks{IAC, Via Lactea s/n, La Laguna, E-38200 Santa Cruz 
de Tenerife, Spain}\\
\\
{\it GianPaolo~Bertelli},\thanks{National Council of Research, Piazzale A.~Moro~2, 
I-00185 Rome, Italy}
{\it Eduardo~Bica},\thanks{Universidade Federal do Rio Grande do Sul, IF, CP\,15051, 
Porto Alegre 91501--970, RS, Brazil}
{\it Catherine~Boisson},\thanks{DAEC, Observatoire de Paris-Meudon, URA 173,
   Universit\'e Paris~7, F-92195 Meudon, France}
{\it Charles~Bonatto},\samethanks{10}\\
\\
{\it Gregory~D.~Bothun},\thanks{Univ.\ of Oregon, Dept.\ of Physics, 120 Willamette Hall, 
Eugene, OR 97403}
{\it Alessandro~Bressan},\thanks{Astronomical Observatory, Vicolo dell'Osservatorio~5,
   I-35122~Padova, Italy}
{\it Jean~P.~Brodie},\thanks{Univ.\ of California, Lick Observatory, Santa Cruz, CA 
95064}
{\it Gustavo~Bruzual},\thanks{CIDA, Apartado Postal 264, M\'erida, 5101-A,
Venezuela}\\
\\
{\it David~Burstein},\thanks{Arizona State Univ., Dept. of Physics \& Astronomy, Tempe, 
   AZ 85287-1504}
{\it Roland~Buser},\thanks{Astron.\ Institut, Univ.\ of Basel, Venusstrasse~7, 
CH-4102 Binningen, Switzerland}
{\it Nelson~Caldwell},\thanks{Steward Observatory, Univ.\ of Arizona, 
Tucson, AZ 85721}
{\it Emilio~Casuso},\samethanks{8}
{\it Miguel~Cervi\~no},\thanks{LAEFF, POB 50727, E-28080 Madrid, Spain}\\
\\
{\it St\'ephane~Charlot},\thanks{Institut d'Astrophysique, 98bis Bd Arago, 
F-75014 Paris, France}
{\it Miguel~Chavez},\samethanks{6}\morethanks{Instituto Nacional de 
Astrof\'{\i}sica, Optica y Electronica, A.P.\ 51~y 216, CP~72000, Puebla, 
Pue., M\'exico}
{\it Cesare~Chiosi},\thanks{Univ.\ of Padova, Department of Astronomy, Vicolo 
dell'Osservatorio~5, I-35122~Padova, Italy}
{\it Carol~A.~Christian},\samethanks{1}\\
\\
{\it Francois~Cuisinier},\samethanks{17} 
{\it Richard~Dallier},\samethanks{11}
{\it Alex~de~Koter},\thanks{Laboratory for Astronomy \& Solar Physics,
Code~681, NASA/Goddard Space Flight Center, Greenbelt, MD 20771}
{\it Sonya~Delisle},\thanks{Universit\'e Laval, D\'epartement de Physique, 
Sainte-Foy, Qu\'ebec, Canada, G1K 7P4}
{\it Angeles~I.~D\'{\i}az},\thanks{Univ.\ Aut\'on.\ de Madrid, Dep.\ de 
F\'{\i}sica Te\'orica, Facultad de Ciencias, C-XI, Cantoblanco, E-28049 
Madrid, Spain}\\
\\
{\it Michael~A.~Dopita},\thanks{Mt.\ Stromlo Observatory, Private Bag, Weston 
Creek P.O., ACT 2611, Australia}
{\it Ben~Dorman},\samethanks{23}
{\it Franco~Fagotto},\samethanks{8}
{\it Michael~N.~Fanelli},\samethanks{23}
{\it Michel~Fioc},\samethanks{20}\\
\\
{\it Mar\'{\i}a~Luisa~Garc\'{\i}a-Vargas},\thanks{IUE Observatory Villafranca del 
Castillo, Apartado 50727,  E-28080 Madrid, Spain}
{\it Leo~Girardi},\samethanks{10} 
{\it Jeffrey~D.~Goldader},\samethanks{1}
{\it Eduardo~Hardy},\samethanks{24}\\
\\
{\it Timothy~M.~Heckman},\thanks{Johns Hopkins Univ., Bloomberg Center for 
Physics and Astronomy, 3400 North Charles St., Baltimore, MD 21218}
{\it Jorge~Iglesias},\samethanks{8}
{\it Pascale~Jablonka},\samethanks{11}
{\it Monique~Joly},\samethanks{11}
{\it Lewis~Jones},\thanks{Univ.\ of North Carolina, Phillips Hall---CB\#3255, 
Dept.\ of Physics and Astronomy, Chapel Hill,  NC 27599-3255}\\
\\
{\it Oliver~Kurth},\samethanks{3}
{\it Ariane~Lan\c{c}on},\thanks{Observatoire de Strasbourg, 11~rue 
de~l'universit\'{e}, F-67000 Strasbourg, France}
\it Thibault Lejeune},\samethanks{17} 
{\it Johannes~Loxen},\samethanks{3}
{\it Andr\'e~Maeder},\thanks{Observatoire de Gen\`eve, CH--1290 
Sauverny, Switzerland}\\
\\
{\it Maria~Lucia~Malagnini},\thanks{Department of Astronomy, Univ.\ 
of Trieste, Via Tiepolo, 11, I-34131 Trieste, Italy}
{\it Paola~Marigo},\samethanks{22}
{\it J.~Miguel~Mas-Hesse},\samethanks{19} 
{\it Georges~Meynet},\samethanks{31}\\
\\
{\it Claudia~S.~M\"oller},\samethanks{3}
{\it Mercedes~L.~Moll\'a},\samethanks{25}
{\it Carlo~Morossi},\thanks{Osservatorio Astronomico di Trieste, 
Via Tiepolo, 11, I-34131 Trieste, Italy}
{\it Emma~Nasi},\samethanks{13} 
{\it Joy~S.~Nichols},\thanks{NASA/GSFC, IUE Observatory/CSC, Code 684.9, 
Greenbelt, MD 20771}\\
\\
{\it Knut~J.~R.~\O degaard},\thanks{Inst.\ of Theor. Astrophysics, Univ.\ 
of Oslo, P.O.Box 1029 Blindern, N-0315 Oslo, Norway}
{\it Joel~Wm.~Parker},\thanks{Southwest Research Institute, Suite~429, 
1050 Walnut Street, Boulder, CO 80302}
{\it Miriani~G.~Pastoriza},\samethanks{10}
{\it Reynier~Peletier},\thanks{Kapteyn Instituut, Postbus 800, 9700 AV
Groningen, Netherlands}\\
\\
{\it Carmelle~Robert},\samethanks{24}
{\it Brigitte~Rocca-Volmerange},\samethanks{20}
{\it Daniel~Schaerer},\samethanks{1}
{\it Alex~Schmidt},\thanks{Universidade Federal de Santa Maria, Dep.\ de 
Matem\'atica/NEPAE, Faixa de Camobi, Santa Maria BR-97100, RS, Brazil}\\
\\
{\it Henrique~R.~Schmitt},\samethanks{1}
{\it Robert~A.~Schommer},\thanks{CTIO, Casilla 603, La~Serena, Chile}
{\it Werner~Schmutz},\thanks{Institute of Astronomy, ETH Zentrum, 
CH-8092 Z\"urich, Switzerland}
{\it Margarida~Serote~Roos},\samethanks{11}\\
\\
{\it Laura~Silva},\samethanks{6} 
{\it Gra\.zyna~Stasi\'nska},\samethanks{11} 
{\it Ralph~S.~Sutherland},\samethanks{26}
{\it Rosaria Tantalo},\samethanks{22}
{\it Peeter~Traat},\thanks{Tartu Observatory, EE-2400 
T\~oravere, Tartumaa, Estonia}\\
\\
{\it Antonella~Vallenari},\samethanks{13} 
{\it Alexandre~Vazdekis},\samethanks{8}
{\it Nolan~R.~Walborn},\samethanks{1}
{\it Guy~Worthey},\thanks{Univ.\ of Michigan, 834 Dennison, Dept.\ 
of Astronomy, Ann Arbor, MI 48109-1090}\morethanks{Hubble Fellow} \&\\ 
\\
{\it Chi-Chao~Wu\/}\samethanks{1}
}

\pub{PASP}
\recacc{23 May 1996}{29 July 1996}

\maketitle

\setcounter{page}{3}

\begin{abstract}
This paper represents a collective effort to provide an extensive electronic
database useful for the interpretation of the spectra and evolution of
galaxies.  A broad variety of empirical and theoretical data are discussed
here, and the data are made fully available in the AAS CD-ROM Series, Vol.~7.

Several empirical stellar libraries are part of this database. 
They cover the ultraviolet spectral range observed with IUE, optical data from 
different ground-based telescopes, and ground-based infrared data. Spectral type
coverage depends on the wavelength, but is mostly complete for types O to M and
luminosity classes~V to~I. A large metallicity range is covered as well.

Theoretical libraries of selected spectral indices of cool stars and of
stellar continuum fluxes in the temperature range 2000~K to 50,000~K, as well
as Wolf-Rayet energy distributions are presented.

Several libraries of star clusters and early-type galaxies have been selected
for this database. We discuss an extensive set of empirical spectral
templates covering the wavelength region from 1200--9800~\AA, as well
as narrow-band line indices in a large number of passbands. Bench-mark
spectra of nearby galaxies for model tests are included as well.

We compiled numerous evolutionary models and isochrones
for stars of all mass ranges of interest, wide metallicity range, 
and for all evolutionary phases, including the pre-main-sequence
phase. The majority of the models have been computed by the Geneva and
Padova groups. 

Evolutionary synthesis models computed by several independent groups are
made available. They can be applied to old and young systems, and are
optimized with respect to different aspects of input physics. The model
predictions include stellar (colors, magnitudes, absorption features) 
and nebular (emission-line fluxes) properties.

Finally, we present models of ionized gas to be used for the
interpretation of active galactic nuclei and young star-forming galaxies

The community is encouraged to make use of this electronic database and
to perform a critical comparison between the individual datasets.

\end{abstract}