Search Publications
Sensor Noise in LISA Pathfinder: In-Flight Performance of the Optical Test Mass Readout
Mendes, L.; Russano, G.; Sanjuan, J. +85 more
We report on the first subpicometer interferometer flown in space. It was part of ESA's Laser Interferometer Space Antenna (LISA) Pathfinder mission and performed the fundamental measurement of the positional and angular motion of two free-falling test masses. The interferometer worked immediately, stably, and reliably from switch on until the end…
Distance of Hi-GAL sources
Zavagno, A.; Elia, D.; Pezzuto, S. +18 more
Aims: Distances are key to determining the physical properties of sources. In the Galaxy, large (> 10 000) homogeneous samples of sources for which distance are available, covering the whole Galactic distance range, are still missing. Here we present a catalog of velocity and distance for a large sample (> 100 000) of Hi-GAL compact sou…
Light bending and X-ray echoes from behind a supermassive black hole
Brandt, W. N.; Costantini, E.; Blandford, R. D. +2 more
The innermost regions of accretion disks around black holes are strongly irradiated by X-rays that are emitted from a highly variable, compact corona, in the immediate vicinity of the black hole1-3. The X-rays that are seen reflected from the disk4, and the time delays, as variations in the X-ray emission echo or `reverberate…
A ∼75 per cent occurrence rate of debris discs around F stars in the β Pic moving group
Pawellek, Nicole; Matrà, Luca; Kennedy, Grant +2 more
Only 20 per cent of old field stars have detectable debris discs, leaving open the question of what disc, if any, is present around the remaining 80 per cent. Young moving groups allow to probe this population, since discs are expected to have been brighter early on. This paper considers the population of F stars in the 23 Myr-old β Pictoris movin…
The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search
Fontanive, Clémence; Bardalez Gagliuffi, Daniella
We present results from an extensive search in the literature and Gaia DR2 for visual, co-moving binary companions to stars hosting exoplanets and brown dwarfs within 200 pc. We found 218 planet hosts out of the 938 in our sample to be part of multiple-star systems, with 10 newly discovered binaries and 2 new tertiary stellar components. This repr…
Low-frequency monitoring of flare star binary CR Draconis: long-term electron-cyclotron maser emission
Ray, T. P.; Callingham, J. R.; Shimwell, T. W. +12 more
Recently detected coherent low-frequency radio emission from M dwarf systems shares phenomenological similarities with emission produced by magnetospheric processes from the gas giant planets of our Solar System. Such beamed electron-cyclotron maser emission can be driven by a star-planet interaction or a breakdown in co-rotation between a rotatin…
Modelling long-period variables - II. Fundamental mode pulsation in the non-linear regime
Girardi, Léo; Marigo, Paola; Lebzelter, Thomas +4 more
Long-period variability in luminous red giants has several promising applications, all of which require models able to accurately predict pulsation periods. Linear pulsation models have proven successful in reproducing the observed periods of overtone modes in evolved red giants, but they fail to accurately predict their fundamental mode (FM) peri…
Isotopic fractionation of water and its photolytic products in the atmosphere of Mars
Montmessin, Franck; Belyaev, Denis A.; Fedorova, Anna A. +13 more
The current Martian atmosphere is about five times more enriched in deuterium than Earth's, providing direct testimony that Mars hosted vastly more water in its early youth than nowadays. Estimates of the total amount of water lost to space from the current mean D/H value depend on a rigorous appraisal of the relative escape between deuterated and…
Resolving a dusty, star-forming SHiZELS galaxy at z = 2.2 with HST, ALMA, and SINFONI on kiloparsec scales
Smail, I.; Ibar, E.; Swinbank, A. M. +6 more
We present ∼0.15 arcsec spatial resolution imaging of SHiZELS-14, a massive ( $M_{*}\sim 10^{11}\, \rm {M_{\odot }}$ ), dusty, star-forming galaxy at z = 2.24. Our rest-frame ${\sim}1\, \rm {kpc}$ -scale, matched-resolution data comprise four different widely used tracers of star formation: the $\rm {H}\,\alpha$ emission line (from SINFONI/VLT), r…
Combined analysis of neutron star natal kicks using proper motions and parallax measurements for radio pulsars and Be X-ray binaries
Igoshev, Andrei P.; Toonen, Silvia; Chruslinska, Martyna +1 more
Supernova explosion and the associated neutron star (NS) natal kicks are important events on a pathway of a binary to become a gravitational wave source, an X-ray binary, or a millisecond radio pulsar. Weak natal kicks often lead to binary survival, while strong kicks frequently disrupt the binary. In this article, we aim to further constrain NS n…