Published in Monthly Notices of the Royal Astronomical Society
We have selected a homogeneous sample of asymptotic giant branch (AGB) stars in the Galactic bulge population from the ISOGAL survey. Our target stars cover a wide range of mass-loss rates (∼ 10− 8–10− 4 M⊙ yr− 1) and differ primarily by their age on the AGB. This homogeneous sample is thus ideally suited to study the dust formation process as a fu...
Published in Monthly Notices of the Royal Astronomical Society
Near-infrared spectroscopy can play a key role in establishing the mineralogical composition of objects and supporting other physical data obtained by complementary observational techniques such as adaptive optics, radar and photometry. The objective of our survey was asteroids that present large variations in their light curves. We report observat...
Published in Monthly Notices of the Royal Astronomical Society
Published in Monthly Notices of the Royal Astronomical Society
We present an analysis of the 2011 photometric observations of TW Hya by the MOST satellite; this is the fourth continuous series of this type. The large-scale light variations are dominated by a strong, quasi-periodic 4.18-d oscillation with superimposed, apparently chaotic flaring activity. The former is probably produced by stellar rotation with...
Published in Monthly Notices of the Royal Astronomical Society
We present an extension of the spectral deconvolution (SD) method to achieve very high contrast at small inner working radii. We apply the method to the specific case of ground-based adaptive optics fed integral field spectroscopy (without a coronagraph). Utilizing the wavelength dependence of the Airy and speckle patterns, we make an accurate esti...
Published in Monthly Notices of the Royal Astronomical Society
The triple asteroidal system (87) Sylvia is composed of a 280-km primary and two small moonlets named Romulus and Remus (Marchis et al. 2005b). Sylvia is located in the main asteroid belt, with semi-major axis of about 3.49 au, eccentricity of 0.08 and 11 of orbital inclination. The satellites are in nearly equatorial circular orbits around the pri...
Published in Monthly Notices of the Royal Astronomical Society
We present two series of MOST (Microvariability and Oscillations of STars) space- based photometry, covering nearly continuously 10 d in 2004 and 30 d in 2007, of selected variable stars in the upper main sequence of the old open cluster M67. New high-precision light curves were obtained for the blue straggler binary/triple systems AH Cnc, ES Cnc a...
Published in Monthly Notices of the Royal Astronomical Society
We confirm 27 planets in 13 planetary systems by showing the existence of statistically significant anticorrelated transit timing variations, which demonstrates that the planet candidates are in the same system, and long-term dynamical stability, which places limits on the masses of the candidates–showing that they are planetary. All of these newly...
Published in Monthly Notices of the Royal Astronomical Society
We report the discovery and analysis of a very strong magnetic field in the rapidly rotating early B-type star HR 5907, based on observations obtained as part of the Magnetism in Massive Stars (MiMeS) project. We infer a rotation period of 0.508 276+ 0.000 015− 0.000 012 d from photometric and Hα EW measurements, making this the shortest period, no...
Published in Monthly Notices of the Royal Astronomical Society
