Search Publications
Forbidden hugs in pandemic times. I. Luminous red nova AT 2019zhd, a new merger in M 31
Lundqvist, P.; Rest, A.; Munari, U. +20 more
We present the follow-up campaign of the luminous red nova (LRN)
Asteroid absolute magnitudes and phase curve parameters from Gaia photometry
Cellino, A.; Muinonen, K.; Penttilä, A. +2 more
Aims: We perform light curve inversion for 491 asteroids to retrieve phase curve parameters, rotation periods, pole longitudes and latitudes, and convex and triaxial ellipsoid shapes by using the sparse photometric observations from Gaia Data Release 2 and the dense ground-based observations from the DAMIT database. We develop a method for th…
Bird's eye view of molecular clouds in the Milky Way. I. Column density and star formation from sub-parsec to kiloparsec scales
Kainulainen, Jouni; Spilker, Andri; Orkisz, Jan
Context. Describing how the properties of the interstellar medium are combined across various size scales is crucial for understanding star formation scaling laws and connecting Galactic and extragalactic data of molecular clouds.
Aims: We describe how the statistical structure of the clouds and its connection to star formation changes from s…
First Solar Orbiter observation of the Alfvénic slow wind and identification of its solar source
André, N.; Fedorov, A.; Livi, S. +27 more
Context. Turbulence dominated by large-amplitude, nonlinear Alfvén-like fluctuations mainly propagating away from the Sun is ubiquitous in high-speed solar wind streams. Recent studies have demontrated that slow wind streams may also show strong Alfvénic signatures, especially in the inner heliosphere.
Aims: The present study focuses on the c…
Detectability of biosignatures on LHS 1140 b
Rauer, Heike; Sousa-Silva, Clara; Wunderlich, Fabian +4 more
Context. Terrestrial extrasolar planets around low-mass stars are prime targets when searching for atmospheric biosignatures with current and near-future telescopes. The habitable-zone super-Earth LHS 1140 b could hold a hydrogen-dominated atmosphere, and is an excellent candidate for detecting atmospheric features.
Aims: In this study we inv…
Vortex-like kinematic signal, spirals, and beam smearing effect in the HD 142527 disk
Pinte, C.; Ménard, F.; van der Plas, G. +8 more
Vortices are one of the most promising mechanisms to locally concentrate millimeter dust grains and allow the formation of planetesimals through gravitational collapse. The outer disk around the binary system HD 142527 is known for its large horseshoe structure with azimuthal contrasts of ~3-5 in the gas surface density and of ~50 in the dust. Usi…
A magnetic reconnection model for hot explosions in the cool atmosphere of the Sun
Ni, Lei; Chen, Yajie; Lin, Jun +2 more
Context. Ultraviolet (UV) bursts and Ellerman bombs (EBs) are transient brightenings observed in the low solar atmospheres of emerging flux regions. Magnetic reconnection is believed to be the main mechanism leading to formation of the two activities, which are usually formed far apart from each other. However, observations also led to the discove…
A search for transiting planets around hot subdwarfs. I. Methods and performance tests on light curves from Kepler, K2, TESS, and CHEOPS
Alonso, R.; Deleuil, M.; Erikson, A. +79 more
Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent opportunities for addressing the question of the evolution of exoplanetary systems directly after the RGB phase of evolution.
Aims: In this project we aim to perform a transit survey …
A sub-Neptune and a non-transiting Neptune-mass companion unveiled by ESPRESSO around the bright late-F dwarf HD 5278 (TOI-130)
Bouchy, F.; Rebolo, R.; Pallé, E. +45 more
Context. Transiting sub-Neptune-type planets, with radii approximately between 2 and 4 R⊕, are of particular interest as their study allows us to gain insight into the formation and evolution of a class of planets that are not found in our Solar System.
Aims: We exploit the extreme radial velocity (RV) precision of the ultra-stable…
Evolved massive stars at low-metallicity. III. A source catalog for the Large Magellanic Cloud
Yang, Ming; Bonanos, Alceste Z.; Gao, Jian +9 more
We present a clean, magnitude-limited (IRAC1 or WISE1 ≤ 15.0 mag) multiwavelength source catalog for the Large Magellanic Cloud (LMC). The catalog was built by crossmatching (1″) and deblending (3″) between the source list of Spitzer Enhanced Imaging Products and Gaia Data Release 2, with strict constraints on the Gaia astrometric solution in orde…