Search Publications
Aperture synthesis imaging of the carbon AGB star R Sculptoris. Detection of a complex structure and a dominating spot on the stellar disk
de Gregorio-Monsalvo, I.; Eriksson, K.; Lindqvist, M. +16 more
Aims: We present near-infrared interferometry of the carbon-rich asymptotic giant branch (AGB) star R Sculptoris (R Scl).
Methods: We employ medium spectral resolution K-band interferometry obtained with the instrument AMBER at the Very Large Telescope Interferometer (VLTI) and H-band low spectral resolution interferometric imaging obser…
Identification of Young Stellar Variables with KELT for K2. I. Taurus Dippers and Rotators
Cargile, Phillip A.; Pepper, Joshua; Stassun, Keivan G. +13 more
One of the most well-studied young stellar associations, Taurus-Auriga, was observed by the extended Kepler mission, K2, in the spring of 2017. K2 Campaign 13 (C13) is a unique opportunity to study many stars in this young association at high photometric precision and cadence. Using observations from the Kilodegree Extremely Little Telescope (KELT…
A gravitationally boosted MUSE survey for emission-line galaxies at z ≳ 5 behind the massive cluster RCS 0224
Kneib, J. -P.; Richard, Johan; Smail, Ian +3 more
We present a Very Large Telescope/Multi Unit Spectroscopic Explorer (MUSE) survey of lensed high-redshift galaxies behind the z = 0.77 cluster RCS 0224-0002. We study the detailed internal properties of a highly magnified (µ ∼ 29) z = 4.88 galaxy seen through the cluster. We detect widespread nebular C IV λλ1548,1551 Å emission from this gal…
Broad-band X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734-292
Harrison, F. A.; Stern, D.; Bianchi, S. +14 more
We discuss the broad-band X-ray spectrum of GRS 1734-292 obtained from non-simultaneous XMM-Newton and NuSTAR (Nuclear Spectroscopic Telescope Array) observations, performed in 2009 and 2014, respectively. GRS1734-292 is a Seyfert 1 galaxy, located near the Galactic plane at z = 0.0214. The NuSTAR spectrum (3-80 keV) is dominated by a primary powe…
The Philae lander mission and science overview
Krüger, Harald; Bibring, Jean-Pierre; Mottola, Stefano +12 more
The Philae lander accomplished the first soft landing and the first scientific experiments of a human-made spacecraft on the surface of a comet. Planned, expected and unexpected activities and events happened during the descent, the touch-downs, the hopping across and the stay and operations on the surface. The key results were obtained during 12-…
EMPIRE: A robust empirical reconstruction of solar irradiance variability
Solanki, S. K.; Yeo, K. L.; Krivova, N. A.
We present a new empirical model of total and spectral solar irradiance (TSI and SSI) variability entitled EMPirical Irradiance REconstruction (EMPIRE). As with existing empirical models, TSI and SSI variability is given by the linear combination of solar activity indices. In empirical models, UV SSI variability is usually determined by fitting th…
Retrieving cloud, dust and ozone abundances in the Martian atmosphere using SPICAM/UV nadir spectra
Vandaele, A. C.; Montmessin, F.; Willame, Y. +4 more
We present the retrieval algorithm developed to analyse nadir spectra from SPICAM/UV aboard Mars-Express. The purpose is to retrieve simultaneously several parameters of the Martian atmosphere and surface: the dust optical depth, the ozone total column, the cloud opacity and the surface albedo. The retrieval code couples the use of an existing com…
Evolutionary Phases of Gas-rich Galaxies in a Galaxy Cluster at z = 1.46
Tamura, Yoichi; Kohno, Kotaro; Suzuki, Tomoko L. +7 more
We report a survey of molecular gas in galaxies in the XMMXCS J2215.9-1738 cluster at z = 1.46. We have detected emission lines from 17 galaxies within a radius of R 200 from the cluster center, in Band 3 data of the Atacama Large Millimeter/submillimeter Array, with a coverage of 93-95 GHz in frequency and 2.33 arcmin2 in sp…
The pebbles/boulders size distributions on Sais: Rosetta's final landing site on comet 67P/Churyumov-Gerasimenko
Jorda, L.; Lamy, P. L.; Lara, L. M. +53 more
By using the imagery acquired by the Optical, Spectroscopic, and Infrared Remote Imaging System Wide-Angle Camera (OSIRIS WAC), we prepare a high-resolution morphological map of the Rosetta Sais final landing site, characterized by an outcropping consolidated terrain unit, a coarse boulder deposit and a fine particle deposit. Thanks to the 0.014 m…
Statistical Detection of the He II Transverse Proximity Effect: Evidence for Sustained Quasar Activity for >25 Million Years
Hennawi, Joseph F.; Prochaska, J. Xavier; Crighton, Neil H. M. +2 more
The He II transverse proximity effect—enhanced He II {Ly}α transmission in a background sightline caused by the ionizing radiation of a foreground quasar—offers a unique opportunity to probe the morphology of quasar-driven He II reionization. We conduct a comprehensive spectroscopic survey to find z∼ 3 quasars in the foreground of 22 background qu…