Publications by Jean-Loup Baudino


A self-consistent cloud model for brown dwarfs and young giant exoplanets: comparison with photometric and spectroscopic observations

The Astrophysical Journal University of Chicago Press (0)

B Charnay, B Bézard, J-L Baudino, M Bonnefoy, A Boccaletti, R Galicher

We developed a simple, physical and self-consistent cloud model for brown dwarfs and young giant exoplanets. We compared different parametrisations for the cloud particle size, by either fixing particle radii, or fixing the mixing efficiency (parameter fsed) or estimating particle radii from simple microphysics. The cloud scheme with simple microphysics appears as the best parametrisation by successfully reproducing the observed photometry and spectra of brown dwarfs and young giant exoplanets. In particular, it reproduces the L-T transition, due to the condensation of silicate and iron clouds below the visible/near-IR photosphere. It also reproduces the reddening observed for low-gravity objects, due to an increase of cloud optical depth for low gravity. In addition, we found that the cloud greenhouse effect shifts chemical equilibriums, increasing the abundances of species stable at high temperature. This effect should significantly contribute to the strong variation of methane abundance at the L-T transition and to the methane depletion observed on young exoplanets. Finally, we predict the existence of a continuum of brown dwarfs and exoplanets for absolute J magnitude=15-18 and J-K color=0-3, due to the evolution of the L-T transition with gravity. This self-consistent model therefore provides a general framework to understand the effects of clouds and appears well-suited for atmospheric retrievals.


Dynamical models to explain observations with SPHERE in planetary systems with double debris belts

ASTRONOMY & ASTROPHYSICS 611 (2018) ARTN A43

C Lazzoni, S Desidera, F Marzari, A Boccaletti, M Langlois, D Mesa, R Gratton, Q Kral, N Pawellek, J Olofsson, M Bonnefoy, G Chauvin, AM Lagrange, A Vigan, E Sissa, J Antichi, H Avenhaus, A Baruffolo, JL Baudino, A Bazzon, JL Beuzit, B Biller, M Bonavita, W Brandner, P Bruno, E Buenzli, F Cantalloube, E Cascone, A Cheetham, RU Claudi, M Cudel, S Daemgen, V De Caprio, P Delorme, D Fantinel, G Farisato, M Feldt, R Galicher, C Ginski, J Girard, E Giro, M Janson, J Hagelberg, T Henning, S Incorvaia, M Kasper, T Kopytova, J Lannier, H LeCoroller, L Lessio, R Ligi, AL Maire, F Menard, M Meyer, J Milli, D Mouillet, S Peretti, C Perrot, D Rouan, M Samland, B Salasnich, G Salter, T Schmidt, S Scuderi, E Sezestre, M Turatto, S Udry, F Wildi, A Zurlo


New spectro-photometric characterization of the substellar object HR2562B using SPHERE

ASTRONOMY & ASTROPHYSICS 612 (2018) ARTN A92

D Mesa, J-L Baudino, B Charnay, V D'Orazi, S Desidera, A Boccaletti, R Gratton, M Bonnefoy, P Delorme, M Langlois, A Vigan, A Zurlo, A-L Maire, M Janson, J Antichi, A Baruffolo, P Bruno, E Cascone, G Chauvin, RU Claudi, V De Caprio, D Fantinel, G Farisato, M Feldt, E Giro, J Hagelberg, S Incorvaia, E Lagadec, A-M Lagrange, C Lazzoni, L Lessio, B Salasnich, S Scuderi, E Sissa, M Turatto


Toward the Analysis of JWST Exoplanet Spectra: Identifying Troublesome Model Parameters

ASTROPHYSICAL JOURNAL 850 (2017) ARTN 150

J-L Baudino, P Molliere, O Venot, P Tremblin, B Bezard, P-O Lagage


Discovery of a warm, dusty giant planet around HIP 65426

ASTRONOMY & ASTROPHYSICS 605 (2017) ARTN L9

G Chauvin, S Desidera, A-M Lagrange, A Vigan, R Gratton, M Langlois, M Bonnefoy, J-L Beuzit, M Feldt, D Mouillet, M Meyer, A Cheetham, B Biller, A Boccaletti, V D'Orazi, R Galicher, J Hagelberg, A-L Maire, D Mesa, J Olofsson, M Samland, TOB Schmidt, E Sissa, M Bonavita, B Charnay, M Cudel, S Daemgen, P Delorme, P Janin-Potiron, M Janson, M Keppler, H Le Coroller, R Ligi, GD Marleau, S Messina, P Molliere, C Mordasini, A Mueller, S Peretti, C Perrot, L Rodet, D Rouan, A Zurlo, C Dominik, T Henning, F Menard, H-M Schmid, M Turatto, S Udry, F Vakili, L Abe, J Antichi, A Baruffolo, P Baudoz, J Baudrand, P Blanchard, A Bazzon, T Buey, M Carbillet, M Carle, J Charton, E Cascone, R Claudi, A Costille, A Deboulbe, V De Caprio, K Dohlen, D Fantinel, P Feautrier, T Fusco, P Gigan, E Giro, D Gisler, L Gluck, N Hubin, E Hugot, M Jaquet, M Kasper, F Madec, Y Magnard, P Martinez, D Maurel, D Le Mignant, O Moeller-Nilsson, M Llored, T Moulin, A Origne, A Pavlov, D Perret, C Petit, J Pragt, P Puget, P Rabou, J Ramos, R Rigal, S Rochat, R Roelfsema, G Rousset, A Roux, B Salasnich, J-F Sauvage, A Sevin, C Soenke, E Stadler, M Suarez, L Weber, F Wildi, S Antoniucci, J-C Augereau, J-L Baudino, W Brandner, N Engler, J Girard, C Gry, Q Kral, T Kopytova, E Lagadec, J Milli, C Moutou, J Schlieder, J Szulagyi, C Thalmann, Z Wahhaj


Orbiting a binary SPHERE characterisation of the HD 284149 system

ASTRONOMY & ASTROPHYSICS 608 (2017) ARTN A106

M Bonavita, V D'Orazi, D Mesa, C Fontanive, S Desidera, S Messina, S Daemgen, R Gratton, A Vigan, M Bonnefoy, A Zurlo, J Antichi, H Avenhaus, A Baruffolo, JL Baudino, JL Beuzit, A Boccaletti, P Bruno, T Buey, M Carbillet, E Cascone, G Chauvin, RU Claudi, V De Caprio, D Fantinel, G Farisato, M Feldt, R Galicher, E Giro, C Gry, J Hagelberg, S Incorvaia, M Janson, M Jaquet, AM Lagrange, M Langlois, J Lannier, H Le Coroller, L Lessio, R Ligi, AL Maire, M Meyer, F Menard, C Perrot, S Peretti, C Petit, J Ramos, A Roux, B Salasnich, G Salter, M Samland, S Scuderi, J Schlieder, M Surez, M Turatto, L Weber


First light of the VLT planet finder SPHERE IV. Physical and chemical properties of the planets around HR8799

ASTRONOMY & ASTROPHYSICS 587 (2016) ARTN A58

M Bonnefoy, A Zurlo, JL Baudino, P Lucas, D Mesa, A-L Maire, A Vigan, R Galicher, D Homeier, F Marocco, R Gratton, G Chauvin, F Allard, S Desidera, M Kasper, C Moutou, A-M Lagrange, J Antichi, A Baruffolo, J Baudrand, J-L Beuzit, A Boccaletti, F Cantalloube, M Carbillet, J Charton, RU Claudi, A Costille, K Dohlen, C Dominik, D Fantinel, P Feautrier, M Feldt, T Fusco, P Gigan, JH Girard, L Gluck, C Gry, T Henning, M Janson, M Langlois, F Madec, Y Magnard, D Maurel, D Mawet, MR Meyer, J Milli, O Moeller-Nilsson, D Mouillet, A Pavlov, D Perret, P Pujet, SP Quanz, S Rochat, G Rousset, A Roux, B Salasnich, G Salter, J-F Sauvage, HM Schmid, A Sevin, C Soenke, E Stadler, M Turatto, S Udry, F Vakili, Z Wahhaj, F Wildi


First light of the VLT planet finder SPHERE I. Detection and characterization of the substellar companion GJ 758 B

ASTRONOMY & ASTROPHYSICS 587 (2016) ARTN A55

A Vigan, M Bonnefoy, C Ginski, H Beust, R Galicher, M Janson, J-L Baudino, E Buenzli, J Hagelberg, V D'Orazi, S Desidera, A-L Maire, R Gratton, J-F Sauvage, G Chauvin, C Thalmann, L Malo, G Salter, A Zurlo, J Antichi, A Baruffolo, P Baudoz, P Blanchard, A Boccaletti, J-L Beuzit, M Carle, R Claudi, A Costille, A Delboulbe, K Dohlen, C Dominik, M Feldt, T Fusco, L Gluck, J Girard, E Giro, C Gry, T Henning, N Hubin, E Hugot, M Jaquet, M Kasper, A-M Lagrange, M Langlois, D Le Mignant, M Llored, F Madec, P Martinez, D Mawet, D Mesa, J Milli, D Mouillet, T Moulin, C Moutou, A Origne, A Pavlov, D Perret, C Petit, J Pragt, P Puget, P Rabou, S Rochat, R Roelfsema, B Salasnich, H-M Schmid, A Sevin, R Siebenmorgen, A Smette, E Stadler, M Suarez, M Turatto, S Udry, F Vakili, Z Wahhaj, L Weber, F Wildi


Interpreting the photometry and spectroscopy of directly imaged planets: a new atmospheric model applied to beta Pictoris b and SPHERE observations

ASTRONOMY & ASTROPHYSICS 582 (2015) ARTN A83

J-L Baudino, B Bezard, A Boccaletti, M Bonnefoy, A-M Lagrange, R Galicher


Physical and orbital properties of beta Pictoris b

ASTRONOMY & ASTROPHYSICS 567 (2014) ARTN L9

M Bonnefoy, G-D Marleau, R Galicher, H Beust, A-M Lagrange, J-L Baudino, G Chauvin, S Borgniet, N Meunier, J Rameau, A Boccaletti, A Cumming, C Helling, D Homeier, E Allard, P Delorme


Near-infrared detection and characterization of the exoplanet HD95086 b with the Gemini Planet Imager

ASTRONOMY & ASTROPHYSICS 565 (2014) ARTN L4

R Galicher, J Rameau, M Bonnefoy, J-L Baudino, T Currie, A Boccaletti, G Chauvin, A-M Lagrange, C Marois


A radiative-convective equilibrium model for young giant exoplanets: Application to β Pictoris b

Proceedings of the International Astronomical Union 8 (2013) 277-278

JL Baudino, B Bézard, A Boccaletti, M Bonnefoy, AM Lagrange

We present a radiative-convective equilibrium model for young giant exoplanets. Model predictions are compared with the existing photometric measurements of the planet β Pictoris b in the J, H, Ks, L', NB 4.05, M' bands. This model will be used to interpret future photometric and spectroscopic observations of exoplanets with SPHERE, mounted at the VLT with a first light expected mid-2014. Copyright © 2013, International Astronomical Union.


Orbital and atmospheric characterization of the planet within the gap of the PDS 70 transition disk

Astronomy and Astrophysics Springer Nature (0)

A Müller, M Keppler, T Henning, M Samland, G Chauvin, H Beust, A-L Maire, K Molaverdikhani, R vanBoekel, M Benisty, A Boccaletti, M Bonnefoy, F Cantalloube, B Charnay, J-L Baudino, M Gennaro, ZC Long, A Cheetham, S Desidera, M Feldt, T Fusco, J Girard, R Gratton, J Hagelberg, M Janson, A-M Lagrange, M Langlois, C Lazzoni, R Ligi, F Menard, D Mesa, M Meyer, P Molliere, C Mordasini, T Moulin, A Pavlov, N Pawellek, SP Quanz, J Ramos, D Rouan, E Sissa, E Stadler, A Vigan, Z Wahhaj, L Weber, A Zurlo


Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70

Astronomy and Astrophysics Springer Verlag (0)

M Keppler, M Benisty, A Müller, T Henning, R van Boekel, F Cantalloube, C Ginski, RG van Holstein, A-L Maire, A Pohl, M Samland, H Avenhaus, J-L Baudino, A Boccaletti, J de Boer, M Bonnefoy, G Chauvin, S Desidera, M Langlois, C Lazzoni, G Marleau, C Mordasini, N Pawellek, T Stolker, A Vigan, A Zurlo, T Birnstiel, W Brandner, M Feldt, M Flock, J Girard, R Gratton, J Hagelberg, A Isella, M Janson, A Juhasz, J Kemmer, Q Kral, A-M Lagrange, R Launhardt, A Matter, F Ménard, J Milli, P Mollière, J Olofsson, L Perez, P Pinilla, C Pinte, SP Quanz, T Schmidt, S Udry, Z Wahhaj, JP Williams, E Buenzli, M Cudel, C Dominik, R Galicher, M Kasper, J Lannier, D Mesa, D Mouillet, S Peretti, C Perrot, G Salter, E Sissa, F Wildi, L Abe, J Antichi, J-C Augereau, A Baruffolo, P Baudoz, A Bazzon, J-L Beuzit, P Blanchard, SS Brems, T Buey, V De Caprio, M Carbillet, M Carle, E Cascone, A Cheetham, R Claudi, A Costille, A Delboulbé, K Dohlen, D Fantinel, P Feautrier, T Fusco, E Giro, D Gisler, L Gluck, C Gry, N Hubin, E Hugot, M Jaquet, D Le Mignant, M Llored, F Madec, Y Magnard, P Martinez, D Maurel, M Meyer, O Moeller-Nilsson, T Moulin, L Mugnier, A Origne, A Pavlov, D Perret, C Petit, J Pragt, P Puget, P Rabou, J Ramos, F Rigal, S Rochat, R Roelfsema, G Rousset, A Roux, B Salasnich, J-F Sauvage, A Sevin, C Soenke, E Stadler, M Suarez, M Turatto, L Weber


The GJ 504 system revisited. Combining interferometric, radial velocity, and high contrast imaging data

Astronomy and Astrophysics Springer Verlag (0)

M Bonnefoy, K Perraut, A-M Lagrange, P Delorme, A Vigan, M Line, L Rodet, C Ginski, D Mourard, G-D Marleau, M Samland, P Tremblin, R Ligi, F Cantalloube, P Mollière, B Charnay, M Kuzuhara, M Janson, C Morley, DD Homeier, VD Orazi, H Klahr, C Mordasini, B Lavie, J-L Baudino, H Beust, S Peretti, A Musso Bartucci, D Mesa, B Bézard, A Boccaletti, R Galicher, J Hagelberg, S Desidera, B Biller, A-L Maire, F Allard, S Borgniet, J Lannier, N Meunier, M Desort, E Alecian, G Chauvin, M Langlois, T Henning, L Mugnier, D Mouillet, R Gratton, T Brandt, M Mc Elwain, J-L Beuzit, M Tamura, Y Hori, W Brandner, E Buenzli, A Cheetham, M Cudel, M Feldt, M Kasper, M Keppler, T Kopytova, M Meyer, C Perrot, D Rouan, G Salter, T Schmidt, E Sissa, F Wildi, P Blanchard, V De Caprio, A Delboulbé, D Maurel, T Moulin, A Pavlov, P Rabou, J Ramos, R Roelfsema, G Rousset, E Stadler, F Rigal, L Weber


Orbital and spectral analysis of the benchmark brown dwarf HD 4747B

ArXiv (0)

S Peretti, D Ségransan, B Lavie, S Desidera, A-L Maire, V D'Orazi, A Vigan, J-L Baudino, A Cheetham, M Janson, G Chauvin, J Hagelberg, F Menard, K Heng, S Udry, A Boccaletti, S Daemgen, HL Coroller, D Mesa, D Rouan, M Samland, T Schmidt, A Zurlo, M Bonnefoy, M Feldt, R Gratton, A-M Lagrange, M Langlois, M Meyer, M Carbillet, M Carle, VD Caprio, L Gluck, E Hugot, Y Magnard, T Moulin, A Pavlov, J Pragt, P Rabou, J Ramos, G Rousset, A Sevin, C Soenke, E Stadler, L Weber, F Wildi

The study of high contrast imaged brown dwarfs and exoplanets depends strongly on evolutionary models. To estimate the mass of a directly imaged substellar object, its extracted photometry or spectrum is used and adjusted with model spectra together with the estimated age of the system. These models still need to be properly tested and constrained. HD 4747B is a brown dwarf close to the H burning mass limit, orbiting a nearby, solar-type star and has been observed with the radial velocity method over almost two decades now. Its companion was also recently detected by direct imaging, allowing a complete study of this particular object. We aim to fully characterize HD 4747B by combining a well constrained dynamical mass and a study of its observed spectral features in order to test evolutionary models for substellar objects and characterize its atmosphere. We combine the radial velocity measurements of HIRES and CORALIE taken over two decades and high contrast imaging of several epochs from NACO, NIRC2 and SPHERE to obtain a dynamical mass. From the SPHERE data we obtain a low resolution spectrum of the companion from Y to H band, as well as two narrow band-width photometric measurements in the K band. A study of the primary star allows in addition to constrain the age of the system as well as its distance. Thanks to the new SPHERE epoch and NACO archival data combined with previous imaging data and high precision radial velocity measurements, we have been able to derive a well constrained orbit. We derive a dynamical mass of mB=70.0$\pm$1.6 MJup which is higher than a previous study, but in better agreement with the models. By comparing the object with known brown dwarfs spectra, we derive a spectral type of L9 and an effective temperature of 1350$\pm$50 K. With a retrieval analysis we constrain the oxygen and carbon abundances and compare them with the ones from the HR 8799 planets.