Search Publications
Non-synchronous rotations in massive binary systems. II. The case of HD 96264A
Gamen, R.; Barbá, R. H.; Morrell, N. I. +3 more
Context. The OWN Survey has detected several O-type stars with composite spectra whose individual components show very different line broadening. Some of these stars have been revealed as binary systems whose components are asynchronous. This fact may be related to the processes acting in these systems (e.g., angular-momentum transfer, tidal force…
The OTELO survey. Faint end of the luminosity function of [O II]3727 emitters at ⟨z⟩ = 1.43
Cepa, J.; Pérez García, A. M.; Alfaro, E. J. +15 more
Aims: In this paper, we aim to study the main properties and luminosity function (LF) of the [O II]3727 emitters detected in the OTELO survey in order to characterise the star formation processes in low-mass galaxies at z ∼ 1.43 and to constrain the faint-end of the LF.
Methods: Here, we describe the selection method and analysis of the …
Imaging from STIX visibility amplitudes
Massa, Paolo; Krucker, Säm; Piana, Michele +5 more
Aims: This study is aimed at providing the first demonstration of STIX Fourier-transform X-ray imaging using semi-calibrated (amplitude-only) visibility data acquired during Solar Orbiter's cruise phase.
Methods: We used a parametric imaging approach whereby STIX visibility amplitudes are fitted by means of two non-linear optimization me…
A lighter core for Phobos?
Li, Fei; Pätzold, Martin; Yan, Jianguo +7 more
Context. The origin of the Martian moons Phobos and Deimos is still poorly understood, and is the focus of intense debate.
Aims: We demonstrate that a stratified internal structure of Phobos is compatible with the observed gravity coefficients.
Methods: We fit previously derived C20 and C22 Phobos gravity coefficien…
Environments of a sample of AzTEC submillimetre galaxies in the COSMOS field
Finoguenov, A.; Aravena, M.; Barrufet, L. +2 more
Aims: Submillimetre galaxies (SMGs) are bright sources at submillimetre wavelengths (F850 µm > 2-5 mJy). Made up of mostly of high-z galaxies (z > 1), SMGs are amongst the most luminous dusty galaxies in the Universe. These galaxies are thought to be the progenitors of the massive elliptical galaxies in the local Univer…
Changes in granulation scales over the solar cycle seen with SDO/HMI and Hinode/SOT
Malherbe, J. M.; Roudier, T.; Ballot, J. +1 more
Context. The Sun is the only star where the superficial turbulent convection can be observed at very high spatial resolution. The Solar Dynamics Observatory (SDO) has continuously observed the full Sun from space with multi-wavelength filters since July 2010. In particular, the Helioseismic and Magnetic Imager (HMI) instrument takes high-cadence f…
Low-frequency radio spectra of submillimetre galaxies in the Lockman Hole
Bondi, M.; Prandoni, I.; Franco, M. +19 more
Aims: We investigate the radio properties of a sample of 850 µm-selected sources from the SCUBA-2 Cosmology Legacy Survey (S2CLS) using new deep, low-frequency radio imaging of the Lockman Hole field from the Low Frequency Array. This sample consists of 53 sources, 41 of which are detected at >5σ at 150 MHz.
Methods: Combining t…
X-ray and ultraviolet observations of the eclipsing cataclysmic variables OV Bootis and SDSS J103533.02+055158.3 with degenerate donors
Schwope, Axel; Traulsen, Iris; Worpel, Hauke
Context. The majority of cataclysmic variables are predicted to be post-period minimum systems with degenerate donor stars, the period bouncers. Owing to their intrinsic faintness, however, only a handful of these systems have so far been securely identified.
Aims: We want to study the X-ray properties of two eclipsing period bouncers, OV Boo…
Characterization of dense Planck clumps observed with Herschel and SCUBA-2
Juvela, M.; Montillaud, J.; Traficante, A. +15 more
Context. Although the basic processes of star formation (SF) are known, more research is needed on SF across multiple scales and environments. The Planck all-sky survey provided a large catalog of Galactic cold clouds and clumps that have been the target of several follow-up surveys.
Aims: We aim to characterize a diverse selection of dense, …
Solar Orbiter's encounter with the tail of comet C/2019 Y4 (ATLAS): Magnetic field draping and cometary pick-up ion waves
Fedorov, A.; Livi, S.; Müller, D. +36 more
Context. Solar Orbiter is expected to have flown close to the tail of comet C/2019 Y4 (ATLAS) during the spacecraft's first perihelion in June 2020. Models predict a possible crossing of the comet tails by the spacecraft at a distance from the Sun of approximately 0.5 AU.
Aims: This study is aimed at identifying possible signatures of the int…