Search Publications
The XMM-Newton serendipitous survey. VIII. The first XMM-Newton serendipitous source catalogue from overlapping observations
Motch, C.; Page, M. J.; Carrera, F. +13 more
Context. XMM-Newton has observed the X-ray sky since early 2000. The XMM-Newton Survey Science Centre Consortium has published catalogues of X-ray and ultraviolet sources found serendipitously in the individual observations. This series is now augmented by a catalogue dedicated to X-ray sources detected in spatially overlapping XMM-Newton observat…
A progenitor candidate for the type II-P supernova SN 2018aoq in NGC 4151
Gromadzki, M.; Smartt, S. J.; Kotak, R. +9 more
We present our findings based on pre- and post-explosion data of the type II-Plateau SN 2018aoq that exploded in NGC 4151. As distance estimates to NGC 4151 vary by an order of magnitude, we utilised the well-known correlation between ejecta velocity and plateau brightness, i.e. the standard candle method, to obtain a distance of 18.2 ± 1.2 Mpc, w…
Merger induced clump formation in distant infrared luminous starburst galaxies
Calabrò, Antonello; Daddi, Emanuele; Jin, Shuowen +6 more
While the formation of stellar clumps in distant galaxies is usually attributed to gravitational violent disk instabilities, we show here that major mergers also represent a competitive mechanism to form bright clumps. Using ∼0.1″ resolution ACS F814W images in the entire COSMOS field, we measured the fraction of clumpy emission in 109 main sequen…
Galactocentric acceleration in VLBI analysis. Findings of IVS WG8
Gipson, J. M.; Gordon, D.; MacMillan, D. S. +8 more
Aims: The IVS Working Group on Galactic Aberration (WG8) was established to investigate issues related to incorporating the effect of Galactic aberration in IVS analysis. The circular motion of the solar system barycenter around the Galactic center causes a change in aberration, which in the case of geodetic VLBI observing is over time scales…
Estimating stellar ages and metallicities from parallaxes and broadband photometry: successes and shortcomings
Feltzing, Sofia; Howes, Louise M.; Lindegren, Lennart +2 more
A deep understanding of the Milky Way galaxy, its formation and evolution requires observations of huge numbers of stars. Stellar photometry, therefore, provides an economical method to obtain intrinsic stellar parameters. With the addition of distance information - a prospect made real for more than a billion stars with the second Gaia data relea…
Consistent dust and gas models for protoplanetary disks. IV. A panchromatic view of protoplanetary disks
Waters, L. B. F. M.; Pinte, C.; Ménard, F. +17 more
Context. Consistent modeling of protoplanetary disks requires the simultaneous solution of both continuum and line radiative transfer, heating and cooling balance between dust and gas and, of course, chemistry. Such models depend on panchromatic observations that can provide a complete description of the physical and chemical properties and energy…
ComPRASS: a Combined Planck-RASS catalogue of X-ray-SZ clusters
Arnaud, M.; Melin, J. -B.; Tarrío, P.
We present the first all-sky catalogue of galaxy clusters and cluster candidates obtained from joint X-ray-SZ detections using observations from the Planck satellite and the ROSAT all-sky survey (RASS). The catalogue contains 2323 objects and has been validated by careful cross-identification with previously known clusters. This validation shows t…
Massive star cluster formation and evolution in tidal dwarf galaxies
Weilbacher, Peter M.; Boquien, Médéric; de Grijs, Richard +8 more
Context. The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may hold the key to understanding their formation.
Aims: We study star cluster formation in a tidal debris, including the vicinity of three tidal dwarf galaxi…
The solar chromosphere at millimetre and ultraviolet wavelengths. I. Radiation temperatures and a detailed comparison
De Pontieu, B.; Rezaei, R.; Carlsson, M. +3 more
Solar observations with the Atacama Large Millimeter/submillimeter Array (ALMA) provide us with direct measurements of the brightness temperature in the solar chromosphere. We study the temperature distributions obtained with ALMA Band 6 (in four sub-bands at 1.21, 1.22, 1.29, and 1.3 mm) for various areas at, and in the vicinity of, a sunspot, co…
An estimate of the k2 Love number of WASP-18Ab from its radial velocity measurements
Csizmadia, Sz.; Smith, A. M. S.; Hellard, H.
Context. Increasing our knowledge of the interior structure, composition, and density distribution of exoplanets is crucial to make progress in the understanding of exoplanetary formation, migration and habitability. However, the directly measurable mass and radius values offer little constraint on interior structure, because the inverse problem i…