Search Publications
MUSE spectroscopy of the ULX NGC 1313 X-1: A shock-ionised bubble, an X-ray photoionised nebula, and two supernova remnants
Godet, O.; Contini, T.; Olive, J. -F. +2 more
Context. The presence of large ionised gaseous nebulae found around some ultraluminous X-ray sources (ULXs) provides the means to assess the mechanical and radiative feedback of the central source, and hence constrain the efficiency and impact on the surroundings of the super-Eddington regime powering most of these sources. NGC 1313 X-1 is an arch…
The Gaia EDR3 view of Johnson-Kron-Cousins standard stars: the curated Landolt and Stetson collections
Rainer, M.; Marinoni, S.; Marrese, P. M. +7 more
Context. In the era of large surveys and space missions, it is necessary to rely on large samples of well-characterized stars for inter-calibrating and comparing measurements from different surveys and catalogues. Among the most employed photometric systems, the Johnson-Kron-Cousins has been used for decades and for a large amount of important dat…
The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc
Amado, P. J.; Caballero, J. A.; Pallé, E. +64 more
We report the discovery of a multiplanetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of Rb = 1.240 ± 0.023 R⊕, a mass of Mb = 2.14 ± 0.34 M⊕, and a bulk density of ρb
J-PLUS: Spectral evolution of white dwarfs by PDF analysis
Hernández-Monteagudo, C.; Gänsicke, B. T.; Carrasco, J. M. +17 more
Aims: We estimated the spectral evolution of white dwarfs with effective temperature using the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2), which provides 12 photometric optical passbands over 2176 deg2.
Methods: We analyzed 5926 white dwarfs with r ≤ 19.5 mag in common between a white dwarf…
LAMOST meets Gaia: The Galactic open clusters
Fu, Xiaoting; Xu, Yan; Chang, Jiang +14 more
Open clusters (OCs) are born and evolve along the Milky Way (MW) plane. On them is imprinted the history of the Galactic disc, including its chemical and dynamical evolution. Chemical and dynamical properties of OCs can be derived from photometric, spectroscopic, and astrometric data of their member stars. Based on the photometric and astrometric …
TOI-3884 b: A rare 6-RE planet that transits a low-mass star with a giant and likely polar spot
Bouchy, F.; Bonfils, X.; Ciardi, D. R. +19 more
The Transiting Exoplanet Survey Satellite mission identified a deep and asymmetric transit-like signal with a periodicity of 4.5 days orbiting the M4 dwarf star TOI-3884. The signal has been confirmed by follow-up observations collected by the ExTrA facility and Las Cumbres Observatory Global Telescope, which reveal that the transit is chromatic. …
A solar coronal loop in a box: Energy generation and heating
Peter, H.; Chitta, L. P.; Solanki, S. K. +4 more
Context. Coronal loops are the basic building block of the upper solar atmosphere as seen in the extreme UV and X-rays. Comprehending how these are energized, structured, and evolve is key to understanding stellar coronae.
Aims: Here we investigate how the energy to heat the loop is generated by photospheric magneto-convection, transported in…
New binaries from the SHINE survey
Moutou, C.; Rouan, D.; Avenhaus, H. +68 more
We present the multiple stellar systems observed within the SpHere INfrared survey for Exoplanet (SHINE). SHINE searched for sub-stellar companions to young stars using high contrast imaging. Although stars with known stellar companions within the SPHERE field of view (< 5.5 arcsec) were removed from the original target list, we detected additi…
Deep images of the Galactic center with GRAVITY
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +65 more
Stellar orbits at the Galactic Center provide a very clean probe of the gravitational potential of the supermassive black hole. They can be studied with unique precision, beyond the confusion limit of a single telescope, with the near-infrared interferometer GRAVITY. Imaging is essential to search the field for faint, unknown stars on short orbits…
A proper motion catalogue for the Milky Way's nuclear stellar disc
Nogueras-Lara, F.; Gallego-Calvente, A. T.; Gallego-Cano, E. +5 more
We present the results of a large-scale proper motion study of the central ∼36′ × 16′ of the Milky Way, based on our high angular resolution GALACTICNUCLEUS survey (epoch 2015) combined with the HST Paschen-α survey (epoch 2008). Our catalogue contains roughly 80 000 stars, an unprecedented kinematic dataset for this region. We describe the data a…