Synthetic spectra (overview)





Last update: April 29, 2002
 

This  web-page is a list of existing synthetic espectra that may be relevant for the GAIA mission. It is not a complete list and we work to extend it as much as possible. If you have knowledge of any other synthetic spectra grid that could be included, please, contact us by e-mail.
 

. Click here for a summary


Kurucz

References:

 'Notes on the convection in the ATLAS9 model atmospheres' F. Castelli, R.G. Gratton and R.L. Kurucz, A&A 318, 841-869 (1997)

 'A library of theoretical stellar flux spectra. I. Synthetic UBVRI photometry and the metallicity scale for F- for K-type stars' R. Buser and R.L.Kurucz, A&A 264, 557-591 (1992)

 'Model atmospheres for G, F, A, B, and O stars' R. L. Kurucz, ApJ Suppl. Ser.,40,1,1977

Grid coverage:


* In the Robert L. Kurucz Main page, under "grid of model atmospheres", some synthetic models, computed by F. Castelli, for alpha-enhanced stars can be found.

   Models for [alpha/Fe]=+0.4 already exist for:


Links:
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PHOENIX

HTML PHOENIX Manual

NextGen (dwarfs):

References:

 'The NextGen Model Atmosphere Grid for 3000 < Teff < 10000K ',P.H. Hauschildt, F. Allard and E. Baron, 1999, ApJ 512, 377

 and Extended: Allard and Hauschildt 1995, ApJ 441, 170
 

Grid coverage:

NextGen2 (dwarfs):

Click here to access the files.

Grid coverage:

NextGen (giants):

Reference:

 'The NEXTGEN Model Atmosphere Grid. II. Spherically Symmetric Model Atmospheres for Giant Stars with Effective Temperatures between 3000 and 6800 K',P.H. Hauschildt, F. Allard, J. Ferguson, E. Baron and D.R. Alexander, 1999, ApJ 525, 195

Grid coverage:

Models with dust:

Reference:

 'The Limiting Effects of Dust in Brown Dwarf Model Atmospheres',Allard F., Hauschildt P.H., Alexander D.R., Tamani A., Schweitzer A., 2001, ApJ 556, 357

Optimal sequence (limits included):
3000 < Teff < 5000 K       STARdusty1999
2500 < Teff < 2900 K       BDdusty1999
1900 < Teff < 2400 K       BDdusty2000
 100 < Teff < 1800 K       BDcond2000


STARdusty1999:

Grid coverage:

BDdusty1999:

Grid coverage:

BDdusty2000:

Grid coverage:

BDcond2000:

Grid coverage:

Links:

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NMARCS

Reference:

 Plez, B., Edvardsson B., Gustafsson B. Eriksson K., Jørgensen U.G., 1997 (private communication)
These models improve the MARCS models (' A grid of model atmospheres for metal-deficient giant stars. I ', Gustafsson B., Bell R. A., Eriksson K., Nordlund A., 1975, A&A 42, 407)

 'Opacity sampling model photospheres for M dwars. I. Computations, sensitivities and comparisons' Brett, J.M., A&A 295, 736, 1995.

Grid coverage:

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Bessell et al. (1989, 1991)

References:

 'Colors of extended static model photospheres of M giants',M.S. Bessell, J.M. Brett, M. Scholtz and P.R. Wood, A&A Suppl. Ser. 77, 1-30 (1989)

'Colors and stratifications of extended static models photospheres of M stars located on the FGB, AGB and supergiant branch' M.S. Bessell, J.M. Brett, M. Scholtz and P.R. Wood, A&A Suppl. Ser. 89, 335-366 (1991)

Model computed as in 'Properties and spectra of extended static model photospheres of M giants' Scholz, M., A&A 145, 251 (1985)

 Grid coverage:

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Fluks et al. (1994)

Reference:

 'On the spectra and photometry of M-giant stars' M.A. Fluks, B. Plez, P.S. Thé, D. de Winter, B.E. Westerlund and H.C. Steenman, A&A Suppl. Ser. 105, 311-336 (1994)

Grid coverage:

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Brown et al. (1989)

References:

 'Model atmospheres for K and M giants', Brown J.A., Johnson H.R., Alexander D.R., Cutright L.C. and Sharp C.M., ApJ Suppl. Ser. 71, 623-646, 1989

Grid coverage:

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BaSeL

This is a library of synthetic stellar spectra combining Kurucz (1995), Bessell et al (1989, 1991) and Fluks et al (1994) for M giants and Allard & Hauschildt (1995) models for M dwarfs.

References:

 ' A standard stellar library for evolutionary synthesis. I. Calibration of theoretical spectra', Th. Lejeune, F. Cuisinier, and R. Buser, A&A Suppl. Ser., 125, 229-246 (1997)

 ' A standard stellar library for evolutionary synthesis. II. The M dwarf extension' T. Lejeune, F. Cuisinier, and R. Buser, A&A Suppl. Ser., 130, 65-75 (1998)

 'A standard stellar library for evolutionary synthesis. III. Metallicity calibration' P. Westera, T. Lejeune, R. Buser, F. Cuisinier, and G. Bruzual A., A&A 381, 524, 2002

Grid coverage:

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Norbert Christlieb (Carbon Stars)

Explanation:

 'I just finished computing a first grid of synthetic spectra of carbon stars. Alpha-enhancement is taken into account. The grid is still a bit crude in Teff and [Fe/H], but it is a start! A refinement in [Fe/H] and Teff as well as extensions of the parameter space covered in Teff and [C/Fe] are in the works. Spectral coverage is 2500..10500 Å, resolution is 80 km/s (that is, about 2 Å at Hgamma)'. Norbert Christlieb (April 22nd, 2002)

Grid coverage:

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Jørgensen et al. (Carbon Stars)

References:

 'Effects of sphericity in carbon star atmospheres'Jørgensen U.G., Johnson H.R., Nordlund A., A&A 261, 263, 1992

 'Spherical models for Carbon Stars' Jørgensen U.G., Johnson H.R., Nordlund A., ASP Conf. Ser., 26, 540, 1992

Grid coverage:


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Johnson & Yorka (R Stars)

References:

 'Model atmospheres for R stars' Johnson, H.R., and Yorka S.B.,ApJ 311, 299-304, 1986

Grid coverage:

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Johnson et al. (Red Giant Stars)

References:

 ' Red Giant Model Atmospheres. I. A grid of opacity sampled models ' Johnson, H.R., Bernat, A.P., Krupp, B.M., ApJS 42, 510, 1980

Grid coverage:

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O'Donoghue et al. (sdB or EHB)

References:

 'A new class of rapidly pulsating star - IV. Oscillations in EC20117-4014 and atmospheric analyses', O'Donoghue, D., Lynas-Gray, A.E., Kilkenny, D., Stobie, R.S., and Koen C., MNRAS 285, 657 (1997)

 Grid coverage:

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Hamann & Koesterke (Nitrogen Wolf-Rayet stars)

References:

 'The nitrogen spectra of Wolf-Rayet stars. A grid of models and its application to the Galactic WN sample', Hamann W.-R., and Koesterke L., A&A 333, 251 (1998)

 'Spectral atlas of the Galactic Wolf-Rayet stars (WN sequence)', Hamann, W.-R., Koesterke, L., Wessolowski, U., A&AS 113, 459 (1995) (¡OBSERVED LIBRARY!)

 Grid coverage:

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Torres & Massey (Observed Carbon Wolf-Rayet stars)

References:

 'An Atlas of optical spectrophotometry of Wolf-Rayet carbon and oxygen stars', Ana V. Torres & Philip Massey, ApJ Suppl. Ser., 65, 459 (1987)

 'Spectrophotometry of Wolf-Rayet stars: Intrinsic Colors and absolute magnitudes', Ana V. Torres & Philip Massey, ApJ, 96, 1076 (1988)

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Schmutz (Wolf-Rayet stars)

References:

 Schmutz, W. 1996, in From Stars to Galaxies: The Impact of Stellar Physics on Galaxy Evolution, ed. C. Leitherer, U. Fritze-von Alvensleben, and J. Huchra, ASP Conf. Series, Vol. 98, p. 92

 Grid coverage:


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