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A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty
We present a 0.16% precise and 0.27% accurate determination of R0, the distance to the Galactic Center. Our measurement uses the star S2 on its 16-year orbit around the massive black hole Sgr A* thatExpand
A search for J-band variability from late-L and T brown dwarfs
We present J-band photometric observations of eight late-L and T type brown dwarfs designed to search for variability. We detect small amplitude periodic variability from three of the objects onExpand
Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
This is the author accepted manuscript. the final version is available from EDP Sciences via the DOI in this record
EVIDENCE FOR X-RAY SYNCHROTRON EMISSION FROM SIMULTANEOUS MID-INFRARED TO X-RAY OBSERVATIONS OF A STRONG Sgr A* FLARE
This paper reports measurements of Sgr A* made with NACO in L' band (3.80 mu m), Ks band (2.12 mu m), and H band (1.66 mu m), and with VISIR in N band (11.88 mu m) at the ESO VLT, as well as withExpand
Discovery of Seven Companions to Intermediate-mass Stars with Extreme Mass Ratios in the Scorpius–Centaurus Association
We report the detection of seven low-mass companions to intermediate-mass stars (SpT B/A/F; ~ 1.5–4.5 M_⊙) in the Scorpius–Centaurus (Sco–Cen) Association using nonredundant aperture maskingExpand
The first determination of the viscosity parameter in the circumstellar disk of a Be Star
Be stars possess gaseous circumstellar decretion disks, which are well described using standard $\alpha$-disk theory. The Be star 28 CMa recently underwent a long outburst followed by a long periodExpand
Long-baseline interferometric multiplicity survey of the Sco-Cen OB association
We present the rst multiplicity-dedicated long baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer toExpand
Imaging the spotty surface of Betelgeuse in the H band
Aims. This paper reports on H-band interferometric observations of Betelgeuse made at the three-telescope interferometer IOTA. We image Betelgeuse and its asymmetries to understand the spatialExpand
The limb-darkened Arcturus: imaging with the IOTA/IONIC interferometer
Aims. We undertook an H band interferometric examination of Arcturus, a star frequently used as a spatial and spectral calibrator. Methods. Using the IOTA 3 telescope interferometer, we performedExpand
The close circumstellar environment of Betelgeuse - II. Diffraction-limited spectro-imaging from 7.76 to 19.50 μm with VLT/VISIR
Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the enrichment of the interstellar medium in dust and molecules. The physical mechanism of this mass loss is howeverExpand
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