Search Publications
Transiting planet candidate from K2 with the longest period
Bouchy, F.; Eggenberger, P.; Blanco-Cuaresma, S. +8 more
Context. We present the transit and follow-up of a single transit event from Campaign 14 of K2, EPIC248847494b, which has a duration of 54 h and a 0.18% depth.
Aims: Using photometric tools and conducting radial velocity follow-up, we vet and characterise this very strong candidate.
Methods: Owing to the long, unknown period, standard fo…
Local Swift-BAT active galactic nuclei prefer circumnuclear star formation
Lutz, D.; Sturm, E.; Tacconi, L. J. +4 more
We use Herschel data to analyze the size of the far-infrared 70 µm emission for z < 0.06 local samples of 277 hosts of Swift-BAT selected active galactic nuclei (AGN), and 515 comparison galaxies that are not detected by BAT. For modest far-infrared luminosities 8.5 <log (LFIR [L⊙]) < 10.5, we find large scatte…
Extended X-ray emission in PKS 1718-649
Callingham, J. R.; Wilms, J.; Kadler, M. +15 more
PKS 1718-649 is one of the closest and most comprehensively studied candidates of a young active galactic nucleus (AGN) that is still embedded in its optical host galaxy. The compact radio structure, with a maximal extent of a few parsecs, makes it a member of the group of compact symmetric objects (CSO). Its environment imposes a turnover of the …
The XXL Survey. XXIV. The final detection pipeline
Chiappetti, L.; Pierre, M.; Faccioli, L. +7 more
Aims: A well characterised detection pipeline is an important ingredient for X-ray cluster surveys.
Methods: We present the final development of the XXL Survey pipeline. The pipeline optimally uses X-ray information by combining many overlapping observations of a source when possible, both for its detection and its characterisation. It c…
Hot prominence detected in the core of a coronal mass ejection. III. Plasma filling factor from UVCS Lyman-α and Lyman-β observations
Heinzel, P.; Jejčič, S.; Bemporad, A. +1 more
Context. We study an erupting prominence embedded in the core of a coronal mass ejection that occurred on August 2, 2000, and focus on deriving the plasma filling factor of the prominence.
Aims: We explore two methods for measuring this factor along the line of sight. They are based on a combination of visible-light and ultraviolet spectrosco…
Sub-arcsecond imaging of Arp 299-A at 150 MHz with LOFAR: Evidence for a starburst-driven outflow
Herrero-Illana, R.; Alberdi, A.; Barcos-Muñoz, L. +8 more
We report on the first sub-arcsecond (0.44 × 0.41 arcsec2) angular resolution image at 150 MHz of the A-nucleus in the luminous infrared galaxy Arp 299, from International Low Frequency Array (LOFAR) Telescope observations. The most remarkable finding is that of an intriguing two-sided, filamentary structure emanating from the A-nucleus…
Large Interstellar Polarisation Survey. II. UV/optical study of cloud-to-cloud variations of dust in the diffuse ISM
Siebenmorgen, R.; Bagnulo, S.; Cox, N. L. J. +3 more
It is well known that the dust properties of the diffuse interstellar medium exhibit variations towards different sight-lines on a large scale. We have investigated the variability of the dust characteristics on a small scale, and from cloud-to-cloud. We use low-resolution spectro-polarimetric data obtained in the context of the Large Interstellar…
The stellar content of the XMM-Newton slew survey
Schmitt, J. H. M. M.; Robrade, J.; Schneider, P. C. +1 more
Aims: We present a detailed analysis of the stellar content of the current version of the XMM-Newton slew survey (XMMSL2).
Methods: Since stars emit only a small fraction of their total luminosity in the X-ray band, the stellar XMMSL2 sources ought to have relatively bright optical counterparts. Therefore the stellar identifications were…
Searching for Hα emitting sources around MWC 758. SPHERE/ZIMPOL high-contrast imaging
de Gregorio-Monsalvo, I.; Quanz, S. P.; Montesinos, B. +14 more
Context. MWC 758 is a young star surrounded by a transitional disk. The disk shows an inner cavity and spiral arms that could be caused by the presence of protoplanets. Recently, a protoplanet candidate has been detected around MWC 758 through high-resolution L'-band observations. The candidate is located inside the disk cavity at a separation of …
The cosmic epoch dependence of environmental effects on size evolution of red-sequence early-type galaxies
Andreon, S.
This work aims to observationally investigate the history of size growth of early-type galaxies and how the growth depends on cosmic epoch and the mass of the halo in which they are embedded. We carried out a photometric and structural analysis in the rest-frame V band of a mass-selected (log M/M⊙ > 10.7) sample of red-sequence early…