Search Publications
WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star
Queloz, D.; Ségransan, D.; Collier Cameron, A. +46 more
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ± 0.1. The 1.5 RJup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of <8 MJup on its mass. The planet is in a re…
Hot oxygen escape from Mars: Simple scaling with solar EUV irradiance
Luhmann, J.; Cravens, T. E.; Combi, M. +8 more
The evolution of the atmosphere of Mars and the loss of volatiles over the lifetime of the solar system is a key topic in planetary science. An important loss process for atomic species, such as oxygen, is ionospheric photochemical escape. Dissociative recombination of O2+ ions (the major ion species) produces fast oxygen ato…
Resolved astrometric orbits of ten O-type binaries
Absil, O.; Ertel, S.; Grellmann, R. +11 more
Aims: Our long-term aim is to derive model-independent stellar masses and distances for long period massive binaries by combining apparent astrometric orbit with double-lined radial velocity amplitudes (SB2).
Methods: We followed-up ten O+O binaries with AMBER, PIONIER and GRAVITY at the VLTI. Here, we report on 130 astrometric observati…
Deuteration of ammonia in the starless core Ophiuchus/H-MM1
Daniel, F.; Schlemmer, S.; Güsten, R. +13 more
Context. Ammonia and its deuterated isotopologues probe physical conditions in dense molecular cloud cores. The time-dependence of deuterium fractionation and the relative abundances of different nuclear spin modifications are supposed to provide a means of determining the evolutionary stages of these objects.
Aims: We aim to test the current…
Lyman continuum leaking AGN in the SSA22 field
Inoue, Akio K.; Iwata, Ikuru; Micheva, Genoveva
Subaru/SuprimeCam narrow-band photometry of the SSA22 field reveals the presence of four Lyman continuum (LyC) candidates among a sample of 14 active galactic nuclei (AGNs). Two show offsets and likely have stellar LyCin nature or are foreground contaminants. The remaining two LyC candidates are type I AGN. We argue that the average LyC escape fra…
Morpho-kinematics of z ∼ 1 galaxies probe the hierarchical scenario
Flores, H.; Hammer, F.; Puech, M. +2 more
We have studied a representative sample of intermediate-mass galaxies at z ∼ 1, observed by the kinematic survey KMOS3D. We have re-estimated the kinematical parameters from the published kinematic maps and analysed photometric data from Hubble Space Telescope (HST) to measure optical disc inclinations and Position Angle. We find that o…
ALMA Measurements of Circumstellar Material in the GQ Lup System
Herczeg, Gregory J.; MacGregor, Meredith A.; Wilner, David J. +7 more
We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 µm continuum and CO J = 3-2 line emission with beam size ∼0.″3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A…
The ACS survey of Galactic globular clusters - XIV. Bayesian single-population analysis of 69 globular clusters
Anderson, J.; Jefferys, W. H.; Stenning, D. C. +7 more
We use Hubble Space Telescope (HST) imaging from the ACS Treasury Survey to determine fits for single population isochrones of 69 Galactic globular clusters. Using robust Bayesian analysis techniques, we simultaneously determine ages, distances, absorptions and helium values for each cluster under the scenario of a 'single' stellar population on m…
SPIDERS: selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys
Georgakakis, A.; Salvato, M.; Buchner, J. +19 more
SPIDERS (SPectroscopic IDentification of eROSITA Sources) is a Sloan Digital Sky Survey IV (SDSS-IV) survey running in parallel to the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) cosmology project. SPIDERS will obtain optical spectroscopy for large numbers of X-ray-selected active galactic nuclei (AGN) and galaxy cluster members detec…
The Solar Energetic Particle Event of 2010 August 14: Connectivity with the Solar Source Inferred from Multiple Spacecraft Observations and Modeling
Thompson, B. J.; Lario, D.; Kwon, R. -Y. +13 more
We analyze one of the first solar energetic particle (SEP) events of solar cycle 24 observed at widely separated spacecraft in order to assess the reliability of models currently used to determine the connectivity between the sources of SEPs at the Sun and spacecraft in the inner heliosphere. This SEP event was observed on 2010 August 14 by near-E…