DELAA , O.

Last name: DELAA

First name: O.

2011 (v1)

Journal article

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Differential rotation in rapidly rotating early-type stars. I. Motivations for combined spectroscopic and interferometric studies

Zorec, J. Frémat, Y. Domiciano de Souza, A.

International audience

Uploaded on: December 3, 2022
July 2015 (v1)

Journal article

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Theoretical impact of fast rotation on calibrating the surface brightness-color relation for early-type stars

Challouf, M. Nardetto, N. Domiciano de Souza, A.

International audience

Uploaded on: December 3, 2022
2010 (v1)

Conference paper

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Performances and first science results with the VEGA/CHARA visible instrument

Mourard, D. Tallon, M. Bério, Ph.

This paper presents the current status of the VEGA (Visible spEctroGraph and polArimeter) instrument installed at the coherent focus of the CHARA Array, Mount Wilson CA. Installed in september 2007, the first science programs have started during summer 2008 and first science results are now published. Dedicated to high angular (0.3mas) and high...

Uploaded on: December 3, 2022
2011 (v1)

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Spatio-spectral encoding of fringes in optical long baseline interferometry . Example of the 3T and 4T recombining mode of VEGA/CHARA

Mourard, D. Bério, P. Perraut, K.

International audience

Uploaded on: December 4, 2022
2011 (v1)

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A large Halpha line forming region for the massive interacting binaries Beta Lyrae and Nu Sagitarii

Bonneau, D. Chesneau, O. Mourard, D.

International audience

Uploaded on: December 4, 2022
2011 (v1)

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Kinematics and geometrical study of the Be stars 48 Persei and Psi Persei with the VEGA/CHARA interferometer

Delaa, O. Stee, P. Meilland, A.

International audience

Uploaded on: December 3, 2022
October 2014 (v1)

Journal article

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Improving the surface brightness-color relation for early-type stars using optical interferometry

Challouf, M. Nardetto, N. Mourard, D.

International audience

Uploaded on: December 3, 2022
2011 (v1)

Journal article

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The fundamental parameters of the roAp star Y Equulei

Perraut, K. Brandão, I. Mourard, D.

International audience

Uploaded on: December 3, 2022
2011 (v1)

Journal article

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Chromosphere of K giant stars.Geometrical extent and spatial structure detection

Bério, P. Merle, T. Thévenin, F.

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Uploaded on: December 3, 2022
June 2010 (v1)

Journal article

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The H α line forming region of AB Aurigae spatially resolved at sub-AU with the VEGA/CHARA spectro-interferometer

Rousselet-Perraut, K. Benisty, M. Mourard, D.

Context. A crucial issue in star formation is to understand the physical mechanism by which mass is accreted onto and ejected bya young star. To derive key constraints on the launching point of the jets and on the geometry of the winds, the visible spectro-polarimeter VEGA installed on the CHARA optical array can be an efficient means of...

Uploaded on: December 3, 2022
2011 (v1)

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The diameter of the CoRoT target HD 49933. Combining the 3D limb darkening, asteroseismology, and interferometry

Bigot, Lionel Mourard, D. Berio, P.

International audience

Uploaded on: December 4, 2022
2011 (v1)

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An investigation of the close environment of Beta Cephei with the VEGA/CHARA interferometer

Nardetto, N. Mourard, D. Tallon-Bosc, I.

International audience

Uploaded on: December 4, 2022
2011 (v1)

Journal article

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The binary Be star Delta Scorpii at high spectral and spatial resolution. I. Disk geometry and kinematics before the 2011 periastron

Meilland, A. Delaa, O. Stee, P.

International audience

Uploaded on: December 3, 2022
June 6, 2011 (v1)

Publication

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The binary Be star δ Sco at high spectral and spatial resolution: Disk geometry and kinematics before the 2011 periastron

Meilland, Anthony Delaa, O. Stee, Philippe

Classical Be stars are hot non-supergiant stars surrounded by a gaseous circumstellar disk that is responsible for the observed IR-excess and emission lines. The influence of binarity on these phenomena remains controversial. delta Sco is a binary system whose primary suddently began to exhibit the Be phenomenon at the last periastron in 2000....

Uploaded on: December 3, 2022
July 2013 (v1)

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Spectrally resolved interferometric observations of α Cephei and physical modeling of fast rotating stars

Delaa, O. Zorec, J. Domiciano de Souza, A.

International audience

Uploaded on: December 3, 2022
July 13, 2010 (v1)

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Time, spatial, and spectral resolution of the Halpha line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer

Chesneau, Olivier Dessart, Luc Mourard, D.

BA-type supergiants are amongst the most optically-bright stars. They are observable in extragalactic environments, hence potential accurate distance indicators. Emission activity in the Halpha line of the BA supergiants Rigel (B8Ia) and Deneb (A2Ia) is indicative of presence of localized time-dependent mass ejections. Here, we employ optical...

Uploaded on: December 3, 2022
September 2012 (v1)

Journal article

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The relationship between γ Cassiopeiae's X-ray emission and its circumstellar environment. II. Geometry and kinematics of the disk from MIRC and VEGA instruments on the CHARA Array

Stee, Ph. Delaa, O. Monnier, J. D.

Context.γ Cas is thought to be the prototype of classical Be stars and is the most studied object among this group. However, as for all Be stars, the origin and the physics of its circumstellar disk responsible for the observed near IR-excess, emission lines, and peculiar X-ray emission is still being debated. Aims: We constrain the geometry...

Uploaded on: December 4, 2022
2018 (v1)

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VESPA: A community-driven Virtual Observatory in Planetary Science

Erard, Stéphane Cecconi, Baptiste Le Sidaner, Pierre

The VESPA data access system focuses on applying Virtual Observatory (VO) standards and tools to Planetary Science. Building on a previous EC-funded Europlanet program, it has reached maturity during the first year of a new Europlanet 2020 program (started in 2015 for 4 years). The infrastructure has been upgraded to handle many fields of Solar...

Uploaded on: December 4, 2022

DELAA , O.

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