Search Publications
The Fornax Deep Survey with VST. IX. Catalog of sources in the FDS area with an example study for globular clusters and background galaxies
van de Ven, Glenn; Mieske, Steffen; Hilker, Michael +18 more
Context. A possible pathway for understanding the events and the mechanisms involved in galaxy formation and evolution is an in-depth investigation of the galactic and inter-galactic fossil sub-structures with long dynamical timescales: stars in the field and in stellar clusters.
Aims: This paper continues the Fornax Deep Survey (FDS) series.…
MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 µm. II. Constraints on the mass and radius of the enshrouded planet PDS 70 b
Quanz, S. P.; Todorov, K. O.; Stolker, T. +4 more
The circumstellar disk of PDS 70 hosts two forming planets, which are actively accreting gas from their environment. The physical and chemical characteristics of these planets remain ambiguous due to their unusual spectral appearance compared to more evolved objects. In this work, we report the first detection of PDS 70 b in the Brα and M' filters…
A significant mutual inclination between the planets within the π Mensae system
De Rosa, Robert J.; Nielsen, Eric L.; Dawson, Rebekah
Context. Measuring the geometry of multi-planet extrasolar systems can provide insight into their dynamical history and the processes of planetary formation. These types of measurements are challenging for systems that are detected through indirect techniques such as radial velocity and transit, having only been measured for a handful of systems t…
Discovery of six new strongly magnetic white dwarfs in the 20 pc local population
Landstreet, John D.; Bagnulo, Stefano
The sample of white dwarfs included in the local 20 pc volume documents, fairly accurately, the total production of white dwarfs over roughly 10 Gyr of stellar evolution in this part of the Milky Way Galaxy. In this sample, we have been systematically searching for magnetic white dwarfs. Here we report the discovery of six new magnetic white dwarf…
The CARMENES search for exoplanets around M dwarfs. Convective shift and starspot constraints from chromatic radial velocities
Amado, P. J.; Bauer, F. F.; Caballero, J. A. +26 more
Context. Variability caused by stellar activity represents a challenge to the discovery and characterization of terrestrial exoplanets and complicates the interpretation of atmospheric planetary signals.
Aims: We aim to use a detailed modeling tool to reproduce the effect of active regions on radial velocity measurements, which aids the ident…
Kinematics and dynamics of Gaia red clump stars. Revisiting north-south asymmetries and dark matter density at large heights
Robin, Annie C.; Famaey, Benoit; Bienaymé, Olivier +2 more
In this study, we analyse the kinematics and dynamics of a homogeneous sample of red clump stars, selected from the second Gaia data release catalogue in the direction of the Galactic poles, at five different positions in the plane. The level of completeness of the sample at heights between 0.6 and 3.5 kpc was asserted through a comparison with th…
The MUSE-Faint survey. I. Spectroscopic evidence for a star cluster in Eridanus 2 and constraints on MACHOs as a constituent of dark matter
Bacon, Roland; Boogaard, Leindert A.; Brinchmann, Jarle +9 more
Aims: It has been shown that the ultra-faint dwarf galaxy Eridanus 2 may host a stellar cluster in its centre. If this cluster is shown to exist, it can be used to set constraints on the mass and abundance of massive astrophysical compact halo objects (MACHOs) as a form of dark matter. Previous research has shown promising expectations in the…
Detailed 3D structure of Orion A in dust with Gaia DR2
Bailer-Jones, Coryn A. L.; Soler, Juan D.; Rezaei Kh., Sara +1 more
The unprecedented astrometry from Gaia's second data release (DR2) provides us with an opportunity to study molecular clouds in the solar neighbourhood in detail. Extracting the wealth of information in these data remains a challenge, however. We have further improved our Gaussian-processes-based, three-dimensional dust mapping technique to allow …
Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
Kuzuhara, M.; Tamura, M.; Bouchy, F. +93 more
We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD…
IGAPS: the merged IPHAS and UVEX optical surveys of the northern Galactic plane
Eislöffel, J.; Gänsicke, B. T.; Groot, P. J. +48 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. Here, we present the IGAPS point source catalogue. It contains 295.4 million rows providing photometry in the filters, i, r, narrow-band Hα, g, and URGO