Search Publications
The State-of-the-art HST Astro-photometric Analysis of the Core of ω Centauri. II. Differential-reddening Map
Anderson, J.; Bedin, L. R.; King, I. R. +3 more
We take advantage of the exquisite quality of the Hubble Space Telescope astro-photometric catalog of the core of ωCen presented in the first paper of this series to derive a high-resolution, high-precision, high-accuracy differential-reddening map of the field. The map has a spatial resolution of 2 × 2 arcsec2 over a total field of vie…
Polarization of the changing-look quasar J1011+5442
Ramos Almeida, C.; Sluse, D.; Hutsemékers, D. +2 more
If the disappearance of the broad emission lines observed in changing-look quasars were caused by the obscuration of the quasar core through moving dust clouds in the torus, high linear polarization typical of type 2 quasars would be expected. We measured the polarization of the changing-look quasar J1011+5442 in which the broad emission lines hav…
Inflows, Outflows, and a Giant Donor in the Remarkable Recurrent Nova M31N 2008-12a?—Hubble Space Telescope Photometry of the 2015 Eruption
Ness, J. -U.; Henze, M.; Shafter, A. W. +14 more
The recurrent nova M31N 2008-12a experiences annual eruptions, contains a near-Chandrasekhar-mass white dwarf, and has the largest mass accretion rate in any nova system. In this paper, we present Hubble Space Telescope (HST) WFC3/UVIS photometry of the late decline of the 2015 eruption. We couple these new data with archival HST observations of t…
Comparative study of the Martian suprathermal electron depletions based on Mars Global Surveyor, Mars Express, and Mars Atmosphere and Volatile EvolutioN mission observations
André, N.; Fedorov, A.; Sauvaud, J. -A. +16 more
Nightside suprathermal electron depletions have been observed at Mars by three spacecraft to date: Mars Global Surveyor, Mars Express, and the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission. This spatial and temporal diversity of measurements allows us to propose here a comprehensive view of the Martian electron depletions through the firs…
The Local [C II] 158 µm Emission Line Luminosity Function
Capak, Peter; Hemmati, Shoubaneh; Faisst, Andreas +4 more
We present, for the first time, the local [C II] 158 µm emission line luminosity function measured using a sample of more than 500 galaxies from the Revised Bright Galaxy Sample. [C II] luminosities are measured from the Herschel PACS observations of the Luminous Infrared Galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey and es…
A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius-Centaurus
Magnier, Eugene A.; Chambers, K. C.; Flewelling, H. +13 more
We present the discovery of eight young M7-L2 dwarfs in the Taurus star-forming region and the Scorpius-Centaurus OB Association, serendipitously found during a wide-field search for L/T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-infrared) photometry. We identify PSO J060.3200+25.9644 (near-infrared spectral type L1) and PSO J077.…
Is near-surface ice the driver of dust activity on 67P/Churyumov-Gerasimenko
Keller, H. U.; Hartogh, P.; Rezac, L. +1 more
Context. Mainly for historical reasons, nearly all of the current thermophysical models of dust activity rely on the poorly justified assumption of cohesionless dust lifted by a gas drag force against the weak nucleus gravity. The interpretation of Rosetta data and our understanding of comet activity is particularly sensitive to this assumption. <…
Origin of the wide-orbit circumbinary giant planet HD 106906. A dynamical scenario and its impact on the disk
Ducourant, C.; Teixeira, R.; Lagrange, A. -M. +4 more
Context. A giant planet has been recently resolved at a projected distance of 730 au from the tight pair of young (~13 Myr) intermediate-mass stars HD 106906AB in the Lower Centaurus Crux (LCC) group. The stars are surrounded by a debris disk which displays a ring-like morphology and strong asymmetries at multiple scales.
Aims: We aim to stud…
A neural network gravitational arc finder based on the Mediatrix filamentation method
Bom, C. R.; Makler, M.; Brandt, C. H. +1 more
Context. Automated arc detection methods are needed to scan the ongoing and next-generation wide-field imaging surveys, which are expected to contain thousands of strong lensing systems. Arc finders are also required for a quantitative comparison between predictions and observations of arc abundance. Several algorithms have been proposed to this e…
Boulder abundances and size-frequency distributions on Oxia Planum-Mars: Scientific implications for the 2020 ESA ExoMars rover
Quantin, Cathy; Pajola, Maurizio; Carter, John +4 more
This paper presents the abundances and the size-frequency distributions (SFD) of boulders identified on a sector of the prime landing site for the ExoMars 2020 rover, in Oxia Planum region. By means of a HiRISE image, boulders ≥ 1.75 m across have been identified and subdivided according to the two main Oxia Planum geological units: the Noachian c…