I. Baraffe

Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945 (2005)

We analyze the possible existence of a pulsational instability excited by the $\\epsilon$-mechanism during the last few centuries of evolution of a Chandrasekhar mass white dwarf prior to its...

Baraffe, I., Chabrier, Gilles, Barman, T., Allard, F., Hauschildt, P. H.

We present evolutionary models for cool brown dwarfs and extra-solar giant planets. The models reproduce the main trends of observed methane dwarfs in near-IR color-magnitude diagrams. We also...

Period - magnitude relationships in BVIJHK-Bands for fundamental mode and first overtone Cepheids (2005)

On the stability of very massive primordial stars (2005)

We present theoretical period - magnitude relationships for Cepheids in different filters for fundamental and first overtone pulsators, completing the work by Alibert et al. (1999). The results are...

On the late spectral types of cataclysmic variable secondaries (2005)

The stability of metal-free very massive stars ($Z$ = 0; $M = 120 - 500 \\msol$) is analyzed and compared with metal-enriched stars. Such zero-metal stars are unstable to nuclear-powered radial...

Pre-Main Sequence models for low-mass stars and brown dwarfs (2005)

We investigate why the spectral type of most cataclysmic variable (CV) secondaries is significantly later than that of a ZAMS star with the same mean density. Using improved stellar input physics,...

Baraffe, I., Chabrier, Gilles, Allard, F., Hauschildt, P.

We present evolutionary models for low mass stars and brown dwarfs ($m \\le 1.2 \\msol$) based on recent improvement of the theory: equation of state, atmosphere models, ... We concentrate on early...

Young, Jupiter-Mass Objects in Ophiuchus (2005)

Allers, K. N., Jaffe, D. T., Van Der Bliek, N. S., Allard, F., Baraffe, I.

We have used 3.5 to 8 micron data from the Cores to Disks (c2d) Legacy survey and our own deep IJHKs images of a 0.5 square degree portion of the c2d fields in Ophiuchus to produce a sample of...

Hot-Jupiters and hot-Neptunes: a common origin? (2005)

Baraffe, I., Chabrier, G., Barman, T. S., Selsis, F., Allard, F., Hauschildt, P. H.

We compare evolutionary models for close-in exoplanets coupling irradiation and evaporation due respectively to the thermal and high energy flux of the parent star with observations of recently...

An Improved Optical Spectrum and New Model Fits of the Likely Brown Dwarf GD 165B (2004)

Kirkpatrick, J., Allard, F., Bida, T., Zuckerman, B., Becklin, E., Chabrier, G., ...

Long thought by some researchers to be an oddity, GD 165B has instead proven to be the first example of a class of very cool objects (the L dwarfs) which, due to dust formation in their photosphere,...

Stability of SN Ia progenitors against radial oscillations (2004)

First determination of the dynamical mass of a binary L dwarf (2004)

We analyze the possible existence of a pulsational instability excited by the $\epsilon$-mechanism during the last few centuries of evolution of a Chandrasekhar mass white dwarf prior to its...

Bouy, H., Duchene, G., Koehler, R., Brandner, W., Bouvier, J., Martin, E. L., ...

We present here the results of astrometric, photometric and spectroscopic observations leading to the determination of the orbit and dynamical masses of the binary L dwarf 2MASSW J0746425+2000321....

A young binary Brown Dwarf in the R-CrA star formation region (2004)

Bouy, H., Brandner, W., Martin, E. L., Delfosse, X., Allard, F., Baraffe, I., ...

We present imaging and spectroscopic observations with HST (WFPC2, ACS/HRC and STIS), VLT (FORS2) and Keck (HIRES) of the dM8 ultra-cool dwarf DENIS-P J185950.9-370632, located in the R-CrA region....

The effect of evaporation on the evolution of close-in giant planets (2004)

Baraffe, I., Selsis, F., Chabrier, G., Barman, T. S., Allard, F., Hauschildt, P. H., ...

We include the effect of evaporation in our evolutionary calculations of close-in giant planets, based on a recent model for thermal evaporation taking into account the XUV flux of the parent star...

The physics of extrasolar gaseous planets : from theory to observable signatures (2004)

Chabrier, G., Allard, F., Baraffe, I., Barman, T., Hauschildt, P. H.

We review our present understanding of the physical properties of substellar objects, brown dwarfs and irradiated or non-irradiated gaseous exoplanets. This includes a description of their internal...

The evolution of irradiated planets. Application to transits (2004)

Chabrier, G., Barman, T., Baraffe, I., Allard, F., Hauschildt, P.

Extending the theory we derived recently for HD209458b to different cases of strongly irradiated gaseous exoplanets, we have calculated the consistent evolution of the new transiting planet,...

The physics of extrasolar gaseous planets : from theory to observable signatures (2004)

Chabrier, Gilles, Allard, F., Baraffe, I., Barman, T., Hauschildt, P. H.

We review our present understanding of the physical properties of substellar objects, brown dwarfs and irradiated or non-irradiated gaseous exoplanets. This includes a description of their internal...

The evolution of irradiated planets. Application to transits (2004)

Chabrier, Gilles, Barman, T., Baraffe, I., Allard, F., Hauschildt, P.

Extending the theory we derived recently for HD209458b to different cases of strongly irradiated gaseous exoplanets, we have calculated the consistent evolution of the new transiting planet,...

The effect of evaporation on the evolution of close-in giant planets (2004)

Baraffe, I., Selsis, F., Chabrier, Gilles, Barman, T. S., Allard, F., Hauschildt, P. H., ...

We include the effect of evaporation in our evolutionary calculations of close-in giant planets, based on a recent model for thermal evaporation taking into account the XUV flux of the parent star...

Stability of SN Ia progenitors against radial oscillations (2004)

The physics of extrasolar gaseous planets : from theory to observable signatures (2004)

We analyze the possible existence of a pulsational instability excited by the $\\epsilon$-mechanism during the last few centuries of evolution of a Chandrasekhar mass white dwarf prior to its...

Chabrier, Gilles, Allard, F., Baraffe, I., Barman, T., Hauschildt, P. H.

We review our present understanding of the physical properties of substellar objects, brown dwarfs and irradiated or non-irradiated gaseous exoplanets. This includes a description of their internal...

The evolution of irradiated planets. Application to transits (2004)

Chabrier, Gilles, Barman, T., Baraffe, I., Allard, F., Hauschildt, P.

Extending the theory we derived recently for HD209458b to different cases of strongly irradiated gaseous exoplanets, we have calculated the consistent evolution of the new transiting planet,...

The effect of evaporation on the evolution of close-in giant planets (2004)

Baraffe, I., Selsis, F., Chabrier, Gilles, Barman, T. S., Allard, F., Hauschildt, P. H., ...

We include the effect of evaporation in our evolutionary calculations of close-in giant planets, based on a recent model for thermal evaporation taking into account the XUV flux of the parent star...

Stability of SN Ia progenitors against radial oscillations (2004)

First determination of the dynamical mass of a binary L dwarf (2004)

We analyze the possible existence of a pulsational instability excited by the $\\epsilon$-mechanism during the last few centuries of evolution of a Chandrasekhar mass white dwarf prior to its...

Bouy, H., Duchêne, G., Köhler, R., Brandner, W., Bouvier, J., Martin, E. L., ...

A young binary brown dwarf in the R-CrA star formation region (2004)

Bouy, H., Brandner, W., Martin, E. L., Delfosse, X., Allard, F., Baraffe, I., ...

First determination of the dynamical mass of a binary L dwarf (2004)

Bouy, H., Duchêne, G., Köhler, R., Brandner, W., Bouvier, J., Martín, E. L., ...

We present here the results of astrometric, photometric and spectroscopic observations leading to the determination of the orbit and dynamical masses of the binary L dwarf 2MASSW J0746425+2000321....

A young binary brown dwarf in the R-CrA star forming region (2004)

Bouy, H., Brandner, W., Martin, E., Delfosse, X., Allard, F., Baraffe, I., ...

Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945 (2003)

Baraffe, I., Chabrier, G., Barman, T., Allard, F., Hauschildt, P. H.

We present evolutionary models for cool brown dwarfs and extra-solar giant planets. The models reproduce the main trends of observed methane dwarfs in near-IR color-magnitude diagrams. We also...

Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945 (2003)

Baraffe, I., Chabrier, Gilles, Barman, T., Allard, F., Hauschildt, P. H.

We present evolutionary models for cool brown dwarfs and extra-solar giant planets. The models reproduce the main trends of observed methane dwarfs in near-IR color-magnitude diagrams. We also...

Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945 (2003)

Baraffe, I., Chabrier, Gilles, Barman, T., Allard, F., Hauschildt, P. H.

We present evolutionary models for cool brown dwarfs and extra-solar giant planets. The models reproduce the main trends of observed methane dwarfs in near-IR color-magnitude diagrams. We also...

Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 (2003)

Baraffe, I., Chabrier, G., Barman, T. S., Allard, F., Hauschildt, P. H.

New low-mass members of the Lupus 3 dark cloud : further indications of pre-main-sequence evolution strongly affected by accretion. (2003)

Comerón, F., Fernández, M., Baraffe, I., Neuhäuser, R., Kaas, A. A.

Distortion of secondaries in semi-detached binaries and the cataclysmic variable period minimum (2002)

Renvoizé, V., Baraffe, I., Kolb, U., Ritter, H.

Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...

QZ Serpentis: A Dwarf Nova with a 2-Hour Orbital Period and an Anomalously Hot, Bright Secondary Star (2002)

Thorstensen, J. R., Fenton, W. H., Patterson, J. O., Kemp, J., Halpern, J., Baraffe, I.

We present spectroscopy and time-series photometry of the dwarf nova QZ Ser. The spectrum shows a rich absorption line spectrum of type K4 +- 2. K-type secondary stars are generally seen in dwarf...

Distortion of secondaries in semi-detached binaries and the cataclysmic variable period minimum (2002)

Renvoize, V., Baraffe, I., Kolb, U., Ritter, H.

Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...

Distortion of secondaries in semi-detached binaries and the cataclysmic variable period minimum (2002)

Renvoize, V., Baraffe, I., Kolb, U., Ritter, H.

Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...

Evolution and Explosion of Very Massive Primordial Stars (2001)

Heger, A., Woosley, S. E., Baraffe, I., Abel, T.

While the modern stellar IMF shows a rapid decline with increasing mass, theoretical investigations suggest that very massive stars (>100 solar masses) may have been abundant in the early universe....

Evolutionary models for low-mass stars and brown dwarfs: uncertainties and limits at very young ages (2001)

Baraffe, I., Chabrier, G., Allard, F.

We analyse pre-Main Sequence evolutionary tracks for low mass stars with masses $m \le 1.4 \msol$ based on the Baraffe et al. (1998) input physics. We also extend the recent Chabrier et al. (2000)...

The Substellar Mass Function in sigma Orionis (2001)

Bejar, V. J. S., Martin, E. L., Osorio, M. R. Zapatero, Rebolo, R., Navascues, D. Barrado Y, ...

We combine results from imaging searches for substellar objects in the sigma Orionis cluster and follow-up photometric and spectroscopic observations to derive a census of the brown dwarf population...

Period - magnitude relationships in BVIJHK-Bands for fundamental mode and first overtone Cepheids (2001)

Mass estimates in short-period compact binaries (2001)

We present theoretical period - magnitude relationships for Cepheids in different filters for fundamental and first overtone pulsators, completing the work by Alibert et al. (1999). The results are...

Kolb, U., King, A.R., Baraffe, I.

Using stellar models we investigate the relation between mass and the spectral type of the secondary star in low-mass short-period compact binaries such as cataclysmic variables and soft X-ray...

Evolutionary models for low-mass stars and brown dwarfs: uncertainties and limits at very young ages (2001)

Baraffe, I., Chabrier, Gilles, Allard, F., Hauschildt, P.H.

We analyse pre-Main Sequence evolutionary tracks for low mass stars with masses $m \\le 1.4 \\msol$ based on the Baraffe et al. (1998) input physics. We also extend the recent Chabrier et al. (2000)...

Period - magnitude relationships in BVIJHK-Bands for fundamental mode and first overtone Cepheids (2001)

Evolutionary models for low-mass stars and brown dwarfs: uncertainties and limits at very young ages (2001)

We present theoretical period - magnitude relationships for Cepheids in different filters for fundamental and first overtone pulsators, completing the work by Alibert et al. (1999). The results are...

Baraffe, I., Chabrier, Gilles, Allard, F., Hauschildt, P.H.

We analyse pre-Main Sequence evolutionary tracks for low mass stars with masses $m \\le 1.4 \\msol$ based on the Baraffe et al. (1998) input physics. We also extend the recent Chabrier et al. (2000)...

Period - magnitude relationships in BVIJHK-Bands for fundamental mode and first overtone Cepheids (2001)

Evolution and Nucleosynthesis of Very Massive Primordial Stars (2000)

We present theoretical period - magnitude relationships for Cepheids in different filters for fundamental and first overtone pulsators, completing the work by Alibert et al. (1999). The results are...

Heger, A., Baraffe, I., Fryer, C. L., Woosley, S. E.

We investigate the evolution, final fate, and nucleosynthetic yields of rotating and non-rotating very massive stars (VMS) of zero metallicity. First we address the issue of mass loss during hydrogen...

Mass estimates in short-period compact binaries (2000)

Kolb, U., King, A. R., Baraffe, I.

Using stellar models we investigate the relation between mass and the spectral type of the secondary star in low-mass short-period compact binaries such as cataclysmic variables and soft X-ray...

On the stability of very massive primordial stars (2000)

Deuterium-burning in substellar objects (2000)

The stability of metal-free very massive stars ($Z$ = 0; $M = 120 - 500 \msol$) is analyzed and compared with metal-enriched stars. Such zero-metal stars are unstable to nuclear-powered radial...

Chabrier, G., Baraffe, I., Allard, F., Hauschildt, P.

We consider the depletion of primordial deuterium in the interior of substellar objects as a function of mass, age and absolute magnitude in several photometric passbands. We characterize potential...

Pre-Main Sequence models for low-mass stars and brown dwarfs (2000)

Baraffe, I., Chabrier, G., Allard, F., Hauschildt, P.

We present evolutionary models for low mass stars and brown dwarfs ($m \le 1.2 \msol$) based on recent improvement of the theory: equation of state, atmosphere models, ... We concentrate on early...

Theory of Low-Mass Stars and Substellar Objects (2000)

Chabrier, G., Baraffe, I.

Since the discovery of the first bona-fide brown dwarfs and extra-solar planets in 1995, the field of low mass stars and substellar objects has considerably progressed, both from theoretical and...

Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres (2000)

Chabrier, G., Baraffe, I., Allard, F., Hauschildt, P.

We present evolutionary calculations for very-low-mass stars and brown dwarfs based on synthetic spectra and non-grey atmosphere models which include dust formation and opacity, i.e. objects with...

On the late spectral types of cataclysmic variable secondaries (2000)

Deuterium-burning in substellar objects (2000)

We investigate why the spectral type of most cataclysmic variable (CV) secondaries is significantly later than that of a ZAMS star with the same mean density. Using improved stellar input physics,...

Chabrier, Gilles, Baraffe, I., Allard, F., Hauschildt, P.

We consider the depletion of primordial deuterium in the interior of substellar objects as a function of mass, age and absolute magnitude in several photometric passbands. We characterize potential...

Theory of Low-Mass Stars and Substellar Objects (2000)

Chabrier, Gilles, Baraffe, I.

Since the discovery of the first bona-fide brown dwarfs and extra-solar planets in 1995, the field of low mass stars and substellar objects has considerably progressed, both from theoretical and...

Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres (2000)

Chabrier, Gilles, Baraffe, I., Allard, F., Hauschildt, P.

We present evolutionary calculations for very-low-mass stars and brown dwarfs based on synthetic spectra and non-grey atmosphere models which include dust formation and opacity, i.e. objects with...

On the stability of very massive primordial stars (2000)

On the late spectral types of cataclysmic variable secondaries (2000)

The stability of metal-free very massive stars ($Z$ = 0; $M = 120 - 500 \\msol$) is analyzed and compared with metal-enriched stars. Such zero-metal stars are unstable to nuclear-powered radial...

Pre-Main Sequence models for low-mass stars and brown dwarfs (2000)

We investigate why the spectral type of most cataclysmic variable (CV) secondaries is significantly later than that of a ZAMS star with the same mean density. Using improved stellar input physics,...

Baraffe, I., Chabrier, Gilles, Allard, F., Hauschildt, P.

We present evolutionary models for low mass stars and brown dwarfs ($m \\le 1.2 \\msol$) based on recent improvement of the theory: equation of state, atmosphere models, ... We concentrate on early...

Deuterium-burning in substellar objects (2000)

Chabrier, Gilles, Baraffe, I., Allard, F., Hauschildt, P.

We consider the depletion of primordial deuterium in the interior of substellar objects as a function of mass, age and absolute magnitude in several photometric passbands. We characterize potential...

Theory of Low-Mass Stars and Substellar Objects (2000)

Chabrier, Gilles, Baraffe, I.

Since the discovery of the first bona-fide brown dwarfs and extra-solar planets in 1995, the field of low mass stars and substellar objects has considerably progressed, both from theoretical and...

Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres (2000)

Chabrier, Gilles, Baraffe, I., Allard, F., Hauschildt, P.

We present evolutionary calculations for very-low-mass stars and brown dwarfs based on synthetic spectra and non-grey atmosphere models which include dust formation and opacity, i.e. objects with...

On the stability of very massive primordial stars (2000)

On the late spectral types of cataclysmic variable secondaries (2000)

The stability of metal-free very massive stars ($Z$ = 0; $M = 120 - 500 \\msol$) is analyzed and compared with metal-enriched stars. Such zero-metal stars are unstable to nuclear-powered radial...