Search Publications
Interferometric radii of bright Kepler stars with the CHARA Array: θ Cygni and 16 Cygni A and B
Stello, D.; White, T. R.; Baron, F. +18 more
We present the results of long-baseline optical interferometry observations using the Precision Astronomical Visual Observations (PAVO) beam combiner at the Center for High Angular Resolution Astronomy (CHARA) Array to measure the angular sizes of three bright Kepler stars: θ Cygni, and both components of the binary system 16 Cygni. Supporting inf…
The bright end of the exo-Zodi luminosity function: disc evolution and implications for exo-Earth detectability
Wyatt, M. C.; Kennedy, G. M.
We present the first characterisation of the 12 µm warm dust (`exo-Zodi') luminosity function around Sun-like stars, focusing on the dustiest systems that can be identified by the WISE mission. We use the sample of main-sequence stars observed by Hipparcos within 150 pc as an unbiased sample, and report the detection of six new warm dust can…
Unveiling new members in five nearby young moving groups
Ábrahám, P.; Kóspál, Á.; Kiss, L. L. +5 more
In the past decade many kinematic groups of young stars (<100 Myr) were discovered in the solar neighbourhood. Since the most interesting period of planet formation overlaps with the age of these groups, their well dated members are attractive targets for exoplanet searches by direct imaging. We combined astrometric, photometric and X-ray data,…
Circumstellar habitable zones of binary-star systems in the solar neighbourhood
Eggl, S.; Haghighipour, N.; Pilat-Lohinger, E. +2 more
Binary and multiple systems constitute more than half of the total stellar population in the solar neighbourhood. Their frequent occurrence as well as the fact that more than 70 planets have already been discovered in such configurations - most notably the telluric companion of α Cen B - make them interesting targets in the search for habitable wo…
Optical interferometry of early-type stars with PAVO@CHARA - I. Fundamental stellar properties
White, T. R.; Tuthill, P. G.; Huber, D. +8 more
We present interferometric observations of seven main-sequence and three giant stars with spectral types from B2 to F6 using the Precision Astronomical Visible Observations beam combiner at the Center for High Angular Resolution Astronomy array. We have directly determined the angular diameters for these objects with an average precision of 2.3 pe…
Two new ultracool benchmark systems from WISE+2MASS
Marocco, F.; Pinfield, D. J.; Jones, H. R. A. +6 more
We have used the Two-Micron All-Sky Survey and the Wide-field Infrared Survey Explorer to look for ultracool dwarfs that are part of multiple systems containing main-sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems. The first system, G255-34AB, is an L2 dwarf companion to…
A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars
White, G. J.; Fossati, L.; Paunzen, E. +3 more
We have analysed the photometric data obtained with the STEREO spacecraft for 558 non-magnetic chemically peculiar (CP) stars to search for rotational and pulsational variability. Applying the Lomb-Scargle and the phase dispersion minimization methods, we have detected photometric variability for 44 objects from which 35 were previously unknown. T…
Magnetic fields in cometary globules - IV. LBN 437
Lee, Chang Won; Soam, A.; Maheswar, G. +2 more
We present results of our R-band polarimetry of a cometary globule, LBN 437 (Gal 96-15, ℓ = 96°, b = -15°), to study the magnetic field geometry of the cloud. We estimated a distance of 360 ± 65 pc to LBN 437 (also one additional cloud, CB 238) using a near-IR photometric method. The foreground contribution to the observed polarization values was …
Dynamical and physical properties of 22 binaries discovered by W. S. Finsen
Docobo, J. A.; Andrade, M.
Using recent speckle measurements performed by different observers, in this paper we present revised orbital elements and dynamical masses for the binaries WDS 02396-1152 (FIN 312), 04515-3454 (FIN 320), 06253+0130 (FIN 343), 07003-2207 (FIN 334 Aa,Ab), 08291-4756 (FIN 315 Aa,Ab), 08345-3236 (FIN 335), 09173-6841 (FIN 363 AB), 09442-2746 (FIN 326)…
Calibration of RAVE distances to a large sample of Hipparcos stars
Francis, Charles
A magnitude-limited population of 18 808 Hipparcos stars is used to calibrate distances for 52 794 RAdial Velocity Experiment (RAVE) stars, including dwarfs, giants and pre-main-sequence stars. I give treatments for a number of types of bias affecting calculation, including bias from the non-linear relationship between the quantity of interest (e.…