Confirmed observations of young protoplanets actively undergoing the process of formation have remained rare to date. In this Letter, we present new insights into the nature of the recently identified protoplanet WISPIT 2 b (age $\sim$ 5 Myr) from VLTI/GRAVITY+ observations. Through the analysis of the spectral energy...
G. Collaboration, K. A. El Dayem, R. Abuter et al.· 1 citation
We present a systematic interferometric search for close supermassive black hole (SMBH) binaries in 20 nearby type 1 active galactic nuclei (AGN) observed with VLTI/\grav. We investigate parsec-scale asymmetric emission by modeling the squared visibilities and closure phases with a single circular Gaussian component pl...
Gravity Collaboration K. Abd El Dayem, N. Aimar, A. Berdeu et al.· 0 citations
Accurate and unbiased determination of stellar parameters is of importance in many astrophysical domains.
We therefore present an improved method to estimate stellar parameters, based on interferometric observations and stellar atmosphere models, as well as spectroscopic and photometric data.
We estimate he fundamental...
N. Ebrahimkutty, D. Mourard, P. Bério et al.· Astronomy & Astrophysics· 0 citations
Residing in the centre of the Milky Way, Sagittarius A* (Sgr A*) is the closest massive black hole1 (MBH). Its vicinity has allowed measuring individual stellar orbits around it2, 3–4. The stars act as test particles and probe the gravitational potential around the 4.3 × 106M⊙ MBH. These observations have determined th...
K. A. El Dayem, R. Abuter, N. Aimar et al.· Nature· 1 citation
The suite called Stellar Parameters and Images with a Cophased Array (SPICA) has two interferometric instruments installed at the focus of the CHARA Array located at Mount Wilson, CA. SPICA is made of SPICA-VIS, a fiber-fed six-beam visible spectrograph with three spectral resolutions, and SPICA-FT, a six-beam near-inf...
D. Mourard, P. Bério, C. Bailet et al.· Astronomy & Astrophysics· 2 citations
Estimations of stellar angular diameters can be determined based on the surface brightness-colour relation (SBCR) and photometry. In the context of the PLATO space mission, the SBCR is considered to be an independent empirical alternative for estimating the stellar radii of FGK stars.
We implemented a homogeneous appro...
R. I. Ibañez Bustos, D. Mourard, N. Nardetto et al.· Astronomy & Astrophysics· 0 citations
Long-baseline optical interferometry provides spatially resolved observations of close binaries, complementing spectroscopic and photometric constraints on stellar parameters.
With the capabilities of the new visible CHARA/SPICA instrument and the multiple spectral band operation of CHARA, our goal is to resolve orbits...
J. Jonák, D. Mourard, J. Monnier et al.· Astronomy & Astrophysics· 0 citations
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