A. Labdon — Scifaro

Spatially resolved broad line region in a quasar at z=4: Dynamical black hole mass and prominent outflow

We present the first near-infrared interferometric data of a QSO at z=4. The K-band observations were performed with GRAVITY+ on the VLTI using all four UTs, detecting a differential phase signal that traces the spatially resolved…

Astrophysics of Galaxies · Physics 2026-02-04 GRAVITY+ Collaboration , K. Abd El Dayem , N. Aimar , A. Berdeu , J. -P. Berger , G. Bourdarot , P. Bourget , W. Brandner , Y. Cao , C. Correia , S. Cuevas Cardona , R. Davies , D. Defrère , A. Drescher , A. Eckart , F. Eisenhauer , M. Fabricius , A. Farah , H. Feuchtgruber , N. M. Förster Schreiber , A. Foschi , P. Garcia , R. Garcia Lopez , R. Genzel , S. Gillessen , T. Gomes , F. Gonté , V. Gopinath , J. Graf , M. Hartl , X. Haubois , F. Haußmann , L. C. Ho , S. Hönig , M. Houllé , S. Joharle , C. Keiman , P. Kervella , J. Kolb , L. Kreidberg , A. Labdon , S. Lacour , O. Lai , S. Lai , R. Laugier , J. -B. Le Bouquin , J. Leftley , R. Li , B. Lopez , D. Lutz , F. Mang , A. Mérand , F. Millour , M. Montargès , N. More , N. Morujão , H. Nowacki , M. Nowak , S. Oberti , C. Onken , J. Osorno , T. Ott , T. Paumard , K. Perraut , G. Perrin , R. Petrov , P. -O. Petrucci , N. Pourré , S. Rabien , C. Rau , D. Ribeiro , S. Robbe-Dubois , M. Sadun Bordoni , M. Salman , J. Sanchez-Bermudez , D. Santos , J. Sauter , M. Scialpi , J. Scigliuto , J. Shangguan , P. Shchekaturov , T. Shimizu , F. Soulez , C. Straubmeier , E. Sturm , M. Subroweit , C. Sykes , L. J. Tacconi , H. Übler , G. Ulbricht , F. Vincent , R. Webster , E. Wieprecht , J. Woillez , C. Wolf

The mid-infrared spectrum of $\beta$ Pictoris b. First VLTI/MATISSE interferometric observations of an exoplanet

Few spectra of directly-imaged exoplanets have been obtained in the mid-infrared (> 3 $\mu$m). This region is particularly rich in molecular spectral signatures, whose measurements can help recover atmospheric parameters and provide a…

Earth and Planetary Astrophysics · Physics 2025-12-11 M. Houllé , F. Millour , P. Berio , J. Scigliuto , S. Lacour , B. Lopez , F. Allouche , J. -C. Augereau , D. Blain , M. Bonnefoy , M. Carbillet , G. Chauvin , J. Leftley , A. Matter , J. Milli , P. Mollière , E. Nasedkin , M. Nowak , P. Palma-Bifani , É. Pantin , P. Priolet , M. Ravet , J. Woillez , W. Balmer , P. Boley , V. Gámez Rosas , J. H. Girard , X. Haubois , S. Hinkley , M. Hogerheijde , W. Jaffe , J. Kammerer , L. Kreidberg , O. Lai , S. Lagarde , A. Labdon , J. -B. Le Bouquin , A. Meilland , A. Mérand , C. Paladini , R. Petrov , E. Rickman , Th. Rivinius , S. Robbe-Dubois , R. van Boekel , J. Varga , A. Vigan , J. J. Wang , G. Weigelt

FU Orionis disk outburst: evidence for a gravitational instability scenario triggered in a magnetically dead zone

Context: FUors outbursts are a crucial stage of accretion in young stars. However a complete mechanism at the origin of the outburst still remains missing. Aims: We aim at constraining the instability mechanism in FU Orionis star itself, by…

Solar and Stellar Astrophysics · Physics 2023-08-23 G. Bourdarot , J-P. Berger , G. Lesur , K. Perraut , F. Malbet , R. Millan-Gabet , J-B. Le Bouquin , R. Garcia-Lopez , J. D. Monnier , A. Labdon , S. Kraus , L. Labadie , A. Aarnio

The Great Dimming of the hypergiant star RW Cephei: CHARA Array images and spectral analysis

The cool hypergiant star RW Cephei is currently in a deep photometric minimum that began several years ago. This event bears a strong similarity to the Great Dimming of the red supergiant Betelgeuse that occurred in 2019-2020. We present…

Solar and Stellar Astrophysics · Physics 2023-08-09 N. Anugu , F. Baron , D. R. Gies , C. Lanthermann , G. H. Schaefer , K. A. Shepard , T. ten Brummelaar , J. D. Monnier , S. Kraus , J. -B. Le Bouquin , C. L. Davies , J. Ennis , T. Gardner , A. Labdon , R. M. Roettenbacher , B. R. Setterholm , W. Vollmann , C. Sigismondi

Dynamical masses of the primary Be star and the secondary sdB star in the single-lined binary kappa Dra (B6 IIIe)

Because many classical Be stars may owe their nature to mass and angular-momentum transfer in a close binary, the present masses, temperatures, and radii of their components are of high interest for comparison to stellar evolution models.…

Solar and Stellar Astrophysics · Physics 2022-11-30 R. Klement , D. Baade , Th. Rivinius , D. R. Gies , L. Wang , J. Labadie-Bartz , P. Ticiani Dos Santos , J. D. Monnier , A. C. Carciofi , A. Mérand , N. Anugu , G. H. Schaefer , J. -B. Le Bouquin , C. L. Davies , J. Ennis , T. Gardner , S. Kraus , B. R. Setterholm , A. Labdon

A detailed analysis of the Gl 486 planetary system

The Gl 486 system consists of a very nearby, relatively bright, weakly active M3.5 V star at just 8 pc with a warm transiting rocky planet of about 1.3 R_Terra and 3.0 M_Terra that is ideal for both transmission and emission spectroscopy…

Earth and Planetary Astrophysics · Physics 2022-09-21 J. A. Caballero , E. Gonzalez-Alvarez , M. Brady , T. Trifonov , T. G. Ellis , C. Dorn , C. Cifuentes , K. Molaverdikhani , J. L. Bean , T. Boyajian , E. Rodriguez , J. Sanz-Forcada , M. R. Zapatero Osorio , C. Abia , P. J. Amado , N. Anugu , V. J. S. Bejar , C. L. Davies , S. Dreizler , F. Dubois , J. Ennis , N. Espinoza , C. D. Farrington , A. Garcia Lopez , T. Gardner , A. P. Hatzes , Th. Henning , E. Herrero , E. Herrero-Cisneros , A. Kaminski , D. Kasper , R. Klement , S. Kraus , A. Labdon , C. Lanthermann , J. -B. Le Bouquin , M. J. Lopez Gonzalez , R. Luque , A. W. Mann , E. Marfil , J. D. Monnier , D. Montes , J. C. Morales , E. Palle , S. Pedraz , A. Quirrenbach , S. Reffert , A. Reiners , I. Ribas , C. Rodriguez-Lopez , G. Schaefer , A. Schweitzer , A. Seifahrt , B. R. Setterholm , Y. Shan , D. Shulyak , E. Solano , K. R. Sreenivas , G. Stefansson , J. Stuermer , H. M. Tabernero , L. Tal-Or , T. ten Brummelaar , S. Vanaverbeke , K. von Braun , A. Youngblood , M. Zechmeister

Interferometric detections of sdO companions orbiting three classical Be stars

Classical Be stars are possible products of close binary evolution, in which the mass donor becomes a hot, stripped O or B-type subdwarf (sdO/sdB), and the mass gainer spins up and grows a disk to become a Be star. While several Be+sdO…

Solar and Stellar Astrophysics · Physics 2022-03-09 R. Klement , G. H. Schaefer , D. R. Gies , L. Wang , D. Baade , Th. Rivinius , A. Gallenne , A. C. Carciofi , J. D. Monnier , A. Mérand , N. Anugu , S. Kraus , C. L. Davies , C. Lanthermann , T. Gardner , P. Wysocki , J. Ennis , A. Labdon , B. R. Setterholm , J. Le Bouquin

Optical interferometry and Gaia measurement uncertainties reveal the physics of asymptotic giant branch stars

Context. Asymptotic giant branch stars are cool luminous evolved stars that are well observable across the Galaxy and populating Gaia data. They have complex stellar surface dynamics Aims. On the AGB star CL Lac, it has been shown that the…

Solar and Stellar Astrophysics · Physics 2020-08-05 A. Chiavassa , K. Kravchenko , F. Millour , G. Schaefer , M. Schultheis , B. Freytag , O. Creevey , V. Hocdé , F. Morand , R. Ligi , S. Kraus , J. D. Monnier , D. Mourard , N. Nardetto , N. Anugu , J. -B. Le Bouquin , C. L. Davies , J. Ennis , T. Gardner , A. Labdon , C. Lanthermann , B. R. Setterholm , T. ten Brummelaar