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"Lyman-alpha wing absorption in cool white dwarf stars"

R. D. Rohrmann, L. G. Althaus, S. O. Kepler ; 2010, MNRAS, in press

Lyman-alpha wing opacity induced by H-H collisions

Lyman-alpha wing opacity induced by H-H2 collisions

Colors and magnitudes

"New cooling sequences for old white dwarfs"

I. Renedo, L. G. Althaus, M. M. Miller Bertolami, A. D. Romero, A. H. Córsico, R. D. Rohrmann,E. García-Berro ; 2010, ApJ, 717, 183

Evolutionary tracks (Z=0.01)

Evolutionary tracks (Z=0.001)

Colors

"New evolutionary sequences for hot H-deficient white dwarfs on the basis of a full account of progenitor evolution"

L. G. Althaus, J. A. Panei, M. M. Miller Bertolami, E. García-Berro, A. H. Córsico, A. D. Romero, S. O. Kepler, R. D. Rohrmann ; 2009, ApJ, 704, 1605

Evolutionary tracks

Colors

"Evolution and colors of helium-core white dwarf stars with high-metallicity progenitors"
Althaus, L. G.,  Panei, J. A., Romero, A. D., Rohrmann, R. D., Córsico, A. H., Garcí­a-Berro, E.,
and Miller Bertolami, M. M. ; 2009, A&A,  502, 207

UBVRIJHKL filters

Hubble filters (with High Resolution Channel)

Read-me

"The age and colors of massive white dwarf stars"
Althaus, L. G., Garcí­a-Berro E., Isern, J., Córsico, A. H., Rohrmann, R. D., 2007, A&A, 465, 249

Evolutionary tracks (including age and colors)

"Full evolutionary models for PG1159 stars. Implications for the helium-rich O(He) stars. "
 Miller Bertolami, M. M., & Althaus, L. G.;  2006, A&A, 454, 845

HR diagram (file)

log(Teff) - log(g) plane (file)

"Mass-radius relations for massive white dwarf stars"
 Althaus,  L. G., García-Berro,  E., Isern,  J.,  Córsico, A. H. ;  2005,  A&A, 441, 689

Evolutionary tracks

"The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection"
Althaus L. G., Serenelli A. M., Panei J. A., Córsico A. H., García-Berro E. and Scóccola C. G. ; 2005, A&A, 435, 631

• log₁₀ (photon luminosity / L_sun) where L_sun is the solar luminosity

• log₁₀ (T_eff[K]) where T_eff is the effective temperature

• log₁₀(age [yr]) counted from the moment at which the remnant reaches T_eff= 10000 K (after the occurrence of the double loop at high luminosities)

• log₁₀ (R_* [cm]) where R_* is the stellar radius

• log₁₀ (g) where g is the surface gravity

• log₁₀(L_he/L_sun), where L_he is the luminosity due to helium burning.

  "Evolution and colours of helium core-core white dwarfs stars: the case of low-metallicity progenitors"
Serenelli A. M., Althaus L. G., Rohrmann R. D., Benvenuto O. G.; 2002, MNRAS, 337, 1091

Helium white dwarf models for two metallicities (Z= 0.001 and Z= 0.0002) and stellar masses as labelled by the file name (see paper for details. Note that ages are in Myr)
 
 

White dwarf stellar mass (Z=0.001) File (gzipped) 0.172 c_172_0010.dat.gz 0.183 c_183_0010.dat.gz 0.197 c_197_0010.dat.gz 0.230 c_230_0010.dat.gz 0.244 c_244_0010.dat.gz 0.300 c_300_0010.dat.gz 0.336 c_336_0010.dat.gz 0.380 c_380_0010.dat.gz 0.390 c_390_0010.dat.gz 0.422 c_422_0010.dat.gz 0.449 c_449_0010.dat.gz

White dwarf stellar mass (Z=0.0002) File (gzipped) 0.199 c_199_0002.dat.gz 0.209 c_209_0002.dat.gz 0.219 c_219_0002.dat.gz 0.225 c_225_0002.dat.gz 0.243 c_243_0002.dat.gz 0.266 c_266_0002.dat.gz 0.280 c_280_0002.dat.gz 0.300 c_300_0002.dat.gz 0.319 c_319_0002.dat.gz

"The ages and colours of cool helium-core white dwarfs"
Serenelli A. M., Althaus L. G., Rohrmann R. D., Benvenuto O. G.; 2001, MNRAS, 325, 607

Colours and bolometric corrections for helium-core white dwarfs from model atmospheres coupled to evolutionary calculations (WD progenitors have solar metallicity). Improved treatment of opacities at higher temperatures (as published in Rohrmann, Serenelli, Althaus, Benvenuto; 2002, MNRAS, 335, 499) allows to extend the tables up to Teff= 20000K. Please, note that ages are given in Log Age [yr].
 

White dwarf stellar mass	File (gzipped)
0.148	c0148_upd.dat
0.160	c0160_upd.dat
0.169	c0169_upd.dat
0.196	c0196_upd.dat
0.242	c0242_upd.dat
0.292	c0292_upd.dat
0.327	c0327_upd.dat
0.360	c0360_upd.dat
0.406	c0406_upd.dat

"Diffusion and the occurrence of hydrogen shell flashes in helium white dwarf stars"
Althaus L. G., Serenelli A. M., Benvenuto O. G.; 2001, MNRAS, 323, 471

Helium white dwarf models from the end of mass loss episodes during the pre-white dwarf evolution down to very low surface luminosities.  Models with stellar masses of 0.169, 0.196, 0.242, 0.292, 0.327, 0.360 and 0.406 solar masses are available. These models are calculated in a self consistent way with the predictions of element diffusion. For each stellar mass we list: surface luminosity, effective temperature, central temperature, central density, age, surface gravity, hydrogen burning nuclear energy release, hydrogen surface abundance and hydrogen envelope mass.
For further details, see readdifu.txt file.
 
 

White dwarf stellar mass	File (gzipped)
0.169	t0169.dat.gz (3.4kb)
0.196	t0196.dat.gz (50kb)
0.242	t0242.dat.gz (39kb)
0.292	t0292.dat.gz (80kb)
0.327	t0327.dat.gz (55kb)
0.360	t0360.dat.gz (64kb)
0.406	t0406.dat.gz (24kb)

Mass-radius relations for white dwarfs stars of different internal compositions"
Panei J. A., Althaus L. G., Benvenuto O. G.; 2000, A&A, 353, 970

Mass-radius relations for helium, carbon, oxygen, silicon and iron core compositions. For each interior composition, it is listed the effective  temperature (in 10^3K), the stellar mass (solar masses) and 100 R/Ro (Ro means the solar radius)

White dwarf models

"Evolution of Helium White Dwarfs of Low and Intermediate Masses"
Althaus L. G., Benvenuto O. G.; 1997, ApJ, 477, 313

Selected stages for 0.1-0.5 solar mass Helium White Dwarf models without Hydrogen envelopes

"Evolution of helium white dwarfs with hydrogen envelopes"
 Benvenuto O. G., Althaus L. G.; 1998, MNRAS, 293, 177

Selected stages for 0.1-0.5 solar mass Helium White Dwarf models with Hydrogen envelopes

"Evolution of DA white dwarfs in the context of a new theory of convection"
Althaus L. G., Benvenuto O. G.; 1998, MNRAS, 296, 206

Selected stages for 0.5-1.0 solar mass Carbon-Oxygen White Dwarf models

"DB white dwarf evolution in the frame of the full spectrum turbulence theory"
Benvenuto O. G., Althaus L. G.; 1997, MNRAS, 288, 1004

Selected stages for 0.5-1.0 solar mass Carbon-Oxygen White Dwarf models