Search Publications
The bright end of the infrared luminosity functions and the abundance of hyperluminous infrared galaxies
Bondi, M.; Prandoni, I.; Małek, K. +20 more
Aims: We provide the most accurate estimate yet of the bright end of the infrared (IR) luminosity functions (LFs) and the abundance of hyperluminous IR galaxies (HLIRGs) with IR luminosities >1013L⊙, thanks to the combination of the high sensitivity, angular resolution, and large area of the LOFAR Deep Fields, which p…
The CARMENES search for exoplanets around M dwarfs. Two terrestrial planets orbiting G 264-012 and one terrestrial planet orbiting Gl 393
Bouchy, F.; Amado, P. J.; Bauer, F. F. +52 more
We report the discovery of two planetary systems, namely G 264-012, an M 4.0 dwarf with two terrestrial planets (Mb sin i=2.50−0.30+0.29 M⊕ and Mc sin i=3.75−0.47+0.48 M⊕), and Gl 393, a bright M 2.0 dwarf with one terrestrial planet (Mb sini = 1.71 …
A strong lensing model of the galaxy cluster PSZ1 G311.65-18.48
Brammer, G.; Grillo, C.; Tozzi, P. +10 more
We present a strong lensing analysis of the galaxy cluster PSZ1 G311.65-18.48 (z = 0.443) using multi-band observations with Hubble Space Telescope complemented with VLT/MUSE spectroscopic data. The MUSE observations provide redshift estimates for the lensed sources and help to reduce misidentification of the multiple images. Spectroscopic data ar…
The unusual widespread solar energetic particle event on 2013 August 19. Solar origin and particle longitudinal distribution
Williams, D.; Jian, L. K.; Rodríguez-Pacheco, J. +11 more
Context. Late on 2013 August 19, STEREO-A, STEREO-B, MESSENGER, Mars Odyssey, and the L1 spacecraft, spanning a longitudinal range of 222° in the ecliptic plane, observed an energetic particle flux increase. The widespread solar energetic particle (SEP) event was associated with a coronal mass ejection (CME) that came from a region located near th…
New mass-loss rates of B supergiants from global wind models
Krtička, J.; Kubát, J.; Krtičková, I.
Massive stars lose a significant fraction of mass during their evolution. However, the corresponding mass-loss rates are rather uncertain, especially for evolved stars. To improve this, we calculated global line-driven wind models for Galactic B supergiants. Our models predict radial wind structure and particularly the mass-loss rates and terminal…
Probing the atmosphere of WASP-69 b with low- and high-resolution transmission spectroscopy
Mallonn, M.; López-Puertas, M.; Nagel, E. +31 more
Consideration of both low- and high-resolution transmission spectroscopy is key for obtaining a comprehensive picture of exoplanet atmospheres. In studies of transmission spectra, the continuum information is well established with low-resolution spectra, while the shapes of individual lines are best constrained with high-resolution observations. I…
Solar prominence diagnostics from non-LTE modelling of Mg II h&k line profiles
Barczynski, K.; Schmieder, B.; Labrosse, N. +1 more
Aims: We investigate a new method to for obtaining the plasma parameters of solar prominences observed in the Mg II h&k spectral lines by comparing line profiles from the IRIS satellite to a bank of profiles computed with a one-dimensional non-local thermodynamic equilibrium (non-LTE) radiative transfer code.
Methods: Using a grid of…
The surface brightness-colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
Kervella, P.; Anderson, R. I.; Maxted, P. F. L. +23 more
Aims: The surface brightness-colour relation (SBCR) is a basic tool for establishing precise and accurate distances within the Local Group. Detached eclipsing binary stars with accurately determined radii and trigonometric parallaxes allow calibration of the SBCRs with unprecedented accuracy.
Methods: We analysed four nearby eclipsing bi…
First near-relativistic solar electron events observed by EPD onboard Solar Orbiter
Fedorov, A.; Kulkarni, S. R.; Lario, D. +61 more
Context. Solar Orbiter, launched in February 2020, started its cruise phase in June 2020, in coincidence with its first perihelion at 0.51 au from the Sun. The in situ instruments onboard, including the Energetic Particle Detector (EPD), operate continuously during the cruise phase enabling the observation of solar energetic particles.
Aims: …
GW190814 follow-up with the optical telescope MeerLICHT
Vreeswijk, P. M.; Groot, P. J.; Bloemen, S. +8 more
Context. The Advanced LIGO and Virgo gravitational wave observatories detected a signal on 2019 August 14 during their third observing run, named GW190814. A large number of electromagnetic facilities conducted follow-up campaigns in the search for a possible counterpart to the gravitational wave event, which was made especially promising given th…