Search Publications
Scaling relations of z ∼ 0.25-1.5 galaxies in various environments from the morpho-kinematics analysis of the MAGIC sample
Bouché, N.; Brinchmann, J.; Krajnović, D. +10 more
Context. The evolution of galaxies is influenced by many physical processes, which may vary depending on their environment.
Aims: We combine Hubble Space Telescope (HST) and Multi-Unit Spectroscopic Explorer (MUSE) data of galaxies at 0.25 ≲ z ≲ 1.5 to probe the impact of environment on the size-mass relation, the main sequence (MS) relation,…
One Star to Tag Them All (OSTTA). I. Radial velocities and chemical abundances for 20 poorly studied open clusters
Baratella, M.; Jordi, C.; Casamiquela, L. +9 more
Context. Open clusters are ideal laboratories to investigate a variety of astrophysical topics, from the properties of the Galactic disc to stellar evolution models. For this purpose, we need to know their chemical composition in detail. Unfortunately, the number of systems with chemical abundances determined from high resolution spectroscopy rema…
The halo around HD 32297: µm-sized cometary dust
Bayo, A.; Olofsson, J.; Thébault, P. +1 more
Context. The optical properties of the second generation dust that we observe in debris disks remain quite elusive, whether it is the absorption efficiencies at millimeter wavelengths or the (un)polarized phase function at near-infrared wavelengths. Thankfully, the same particles are experiencing forces that are size dependent (e.g., radiation pre…
Determination of coronal mass ejection orientation and consequences for their propagation
Temmer, M.; Vršnak, B.; Veronig, A. +2 more
Context. The configuration of the interplanetary magnetic field and features of the related ambient solar wind in the ecliptic and meridional plane are different. Therefore, one can expect that the orientation of the flux-rope axis of a coronal mass ejection (CME) influences the propagation of the CME itself. However, the determination of the CME …
An expanded ultraluminous X-ray source catalogue
Zezas, A.; Schwope, A. D.; Traulsen, I. +2 more
Context. Ultraluminous X-ray sources (LX ≳ ×1039 erg s−1, ULXs) are excellent probes for extreme accretion physics, star formation history in galaxies, and intermediate-mass black holes searches. As the sample size of X-ray data from modern observatories such as XMM-Newton and Chandra increases, producing extensive…
Blanco DECam Bulge Survey (BDBS). V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3
Rich, R. Michael; Kunder, Andrea; Johnson, Christian I. +8 more
Aims: The Blanco DECam Bulge Survey (BDBS) has imaged more than 200 square degrees of the southern Galactic bulge, providing photometry in the ugrizy filters for ∼250 million unique stars. The presence of a strong foreground disk population, along with complex reddening and extreme image crowding, has made it difficult to constrain the presen…
Breaking Orion's Veil with fossil outflows
Bally, J.; Goicoechea, J. R.; van der Tak, F. F. S. +3 more
Context. The role of feedback in the self-regulation of star formation is a fundamental question in astrophysics. The Orion Nebula is the nearest site of ongoing and recent massive star formation. It is a unique laboratory for the study of stellar feedback. Recent SOFIA [C II] 158 µm observations have revealed an expanding bubble, the Veil s…
Deciphering stellar metallicities in the early Universe: case study of a young galaxy at z = 4.77 in the MUSE eXtremely Deep Field
Feltre, Anna; Bacon, Roland; Verhamme, Anne +8 more
Directly characterising the first generations of stars in distant galaxies is a key quest of observational cosmology. We present a case study of ID53 at z = 4.77, the UV-brightest (but L⋆) star-forming galaxy at z > 3 in the MUSE eXtremely Deep Field with a mass of ≈109 M⊙. In addition to very strong Lyman-α (Ly…
Radial velocity survey for planets around young stars (RVSPY). A transiting warm super-Jovian planet around HD 114082, a young star with a debris disk
Trifonov, Trifon; Henning, Thomas; Reffert, Sabine +7 more
Aims: We aim to detect planetary companions to young stars with debris disks via the radial velocity method.
Methods: We observed HD 114082 during April 2018-August 2022 as one of the targets of our RVSPY program (Radial Velocity Survey for Planets around Young stars). We use the FEROS spectrograph, mounted to the MPG/ESO 2.2 m telescope…
Starbursts with suppressed velocity dispersion revealed in a forming cluster at z = 2.51
Magnelli, B.; Daddi, E.; Elbaz, D. +19 more
One of the most prominent features of galaxy clusters is the presence of a dominant population of massive ellipticals in their cores. Stellar archaeology suggests that these gigantic beasts assembled most of their stars in the early Universe via starbursts. However, the role of dense environments and their detailed physical mechanisms in triggerin…