Search Publications
Magnetic properties on the boundary of an evolving pore
Jurčák, J.; Bello González, N.; García-Rivas, M.
Context. Analyses of the magnetic properties on umbrae boundaries have led to the Jurčák criterion, which states that umbra-penumbra boundaries in stable sunspots are equally defined by a constant value of the vertical magnetic field, Bvercrit, and by a 50% continuum intensity of the quiet Sun, IQS. Umbrae with ver…
The GRAVITY young stellar object survey. IV. The CO overtone emission in 51 Oph at sub-au scales
Genzel, R.; Sturm, E.; Labadie, L. +69 more
Context. 51 Oph is a Herbig Ae/Be star that exhibits strong near-infrared CO ro-vibrational emission at 2.3 µm, most likely originating in the innermost regions of a circumstellar disc.
Aims: We aim to obtain the physical and geometrical properties of the system by spatially resolving the circumstellar environment of the inner gaseous d…
Multiwavelength dissection of a massive heavily dust-obscured galaxy and its blue companion at z∼2
Daddi, E.; Béthermin, M.; Ciesla, L. +4 more
Aims: We study a system of two galaxies, Astarte and Adonis, at z ∼ 2. At this time, the Universe was undergoing the peak of its star formation activity. Astarte is a dusty star-forming galaxy at the massive end of the main sequence (MS), and Adonis is a less massive companion galaxy that is bright in the ultraviolet and has an optical spectr…
A super-Earth on a close-in orbit around the M1V star GJ 740. A HADES and CARMENES collaboration
Rebolo, R.; Amado, P. J.; Caballero, J. A. +23 more
Context. M-dwarfs have proven to be ideal targets for planetary radial velocity (RV) searches due to their higher planet-star mass contrast, which favors the detection of low-mass planets. The abundance of super-Earth and Earth-like planets detected around this type of star motivates further such research on hosts without reported planetary compan…
High-resolution Hα imaging of the northern Galactic plane and the IGAPS image database
Eislöffel, J.; Groot, P. J.; Stecklum, B. +19 more
The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys IPHAS and UVEX based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. It captures the entire northern Galactic plane within the Galactic coordinate range |b|< 5° and 30° < ℓ < 215°. From the beginning, the incorporation of n…
The physical properties of local (U)LIRGs: A comparison with nearby early- and late-type galaxies
Bianchi, S.; Georgantopoulos, I.; Masoura, V. A. +6 more
Aims: In order to pinpoint the place of the (ultra-) luminous infrared galaxies ((U)LIRGs) in the local Universe, we examine the properties of a sample of 67 such nearby systems and compare them with those of 268 early- and 542 late-type, well studied, galaxies from the DustPedia database.
Methods: We made use of multi-wavelength photome…
The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy
Scandariato, G.; Pagano, I.; Poretti, E. +44 more
Context. The analysis of exoplanetary atmospheres by means of high-resolution spectroscopy is an expanding research field which provides information on the chemical composition, thermal structure, atmospheric dynamics, and orbital velocity of exoplanets.
Aims: In this work, we aim to detect the light reflected by the exoplanet 51 Peg b by emp…
The diffuse interstellar band around 8620 Å. II. Kinematics and distance of the DIB carrier
Schultheis, M.; Recio-Blanco, A.; de Laverny, P. +4 more
Context. Diffuse interstellar bands (DIBs) are important interstellar absorption features of which the origin is still debated. With the large data sets from modern spectroscopic surveys, background stars are widely used to show how the integrated columns of DIB carriers accumulate from the Sun to great distances. To date, studies on the kinematic…
The β Pictoris b Hill sphere transit campaign. I. Photometric limits to dust and rings
Wang, L.; Lecavelier des Etangs, A.; Stee, P. +33 more
Aims: Photometric monitoring of β Pic in 1981 showed anomalous fluctuations of up to 4% over several days, consistent with foreground material transiting the stellar disk. The subsequent discovery of the gas giant planet β Pic b and the predicted transit of its Hill sphere to within a 0.1 au projected separation of the planet provided an oppo…
Radio evidence for a shock wave reflected by a coronal hole
Bemporad, A.; Frassati, F.; Giordano, S. +4 more
We report the first unambiguous observational evidence in the radio range of the reflection of a coronal shock wave at the boundary of a coronal hole. The event occurred above an active region located at the northwest limb of the Sun and was characterized by an eruptive prominence and an extreme-ultraviolet wave steepening into a shock. The EUV ob…