Search Publications
The ALMA-ALPAKA survey. I. High-resolution CO and [CI] kinematics of star-forming galaxies at z = 0.5-3.5
Magdis, G. E.; Zanella, A.; Brammer, G. +13 more
Context. Spatially resolved studies of the kinematics of galaxies provide crucial insights into their assembly and evolution, enabling one to infer the properties of the dark matter halos, derive the impact of feedback on the interstellar medium (ISM), as well as measure and characterize the outflow motions. To date, most of the kinematic studies …
The hidden side of cosmic star formation at z > 3. Bridging optically dark and Lyman-break galaxies with GOODS-ALMA
Magnelli, B.; Daddi, E.; Elbaz, D. +37 more
Our current understanding of the cosmic star formation history at z > 3 is primarily based on UV-selected galaxies (Lyman-break galaxies, i.e., LBGs). Recent studies of H-dropouts (HST-dark galaxies) have revealed that we may be missing a large proportion of star formation that is taking place in massive galaxies at z > 3. In this work, we e…
Photometric binaries, mass functions, and structural parameters of 78 Galactic open clusters
Milone, Antonino P.; Vesperini, Enrico; Lagioia, Edoardo P. +8 more
Context. Binary stars play a crucial role in our understanding of the formation and evolution of star clusters and their stellar populations.
Aims: We use Gaia Data Release 3 to homogeneously analyze 78 Galactic open clusters and the unresolved binary systems they host, each composed of two main sequence (MS) stars.
Methods: We first inv…
A JWST inventory of protoplanetary disk ices. The edge-on protoplanetary disk HH 48 NE, seen with the Ice Age ERS program
van Dishoeck, E. F.; Pontoppidan, K. M.; Rocha, W. R. M. +24 more
Ices are the main carriers of volatiles in protoplanetary disks and are crucial to our understanding of the protoplanetary disk chemistry that ultimately sets the organic composition of planets. The Director's Discretionary-Early Release Science (DD-ERS) program Ice Age on the James Webb Space Telescope (JWST) follows the ice evolution through all…
Non-LTE radiative transfer with Turbospectrum
Bergemann, Maria; Hoppe, Richard; Plez, Bertrand +4 more
Physically realistic models of stellar spectra are needed in a variety of astronomical studies, from the analysis of fundamental stellar parameters, to studies of exoplanets and stellar populations in galaxies. Here we present a new version of the widely used radiative transfer code Turbospectrum, which we update so that it is able to perform spec…
Gaia Data Release 3. Hot-star radial velocities
Smith, M.; Gosset, E.; Caffau, E. +38 more
Context. The second Gaia data release, DR2, contained radial velocities of stars with effective temperatures up to Teff = 6900 K. The third data release, Gaia DR3, extends this up to Teff = 14 500 K.
Aims: We derive the radial velocities for hot stars (i.e., in the Teff = 6900 − 14 500 K range) from data obtai…
Two temperate Earth-mass planets orbiting the nearby star GJ 1002
Rebolo, R.; Amado, P. J.; Caballero, J. A. +43 more
We report the discovery and characterisation of two Earth-mass planets orbiting in the habitable zone of the nearby M-dwarf GJ 1002 based on the analysis of the radial-velocity (RV) time series from the ESPRESSO and CARMENES spectrographs. The host star is the quiet M5.5 V star GJ 1002 (relatively faint in the optical, V ~ 13.8 mag, but brighter i…
JWST MIRI/MRS in-flight absolute flux calibration and tailored fringe correction for unresolved sources
Law, David R.; Álvarez-Márquez, Javier; Vandenbussche, Bart +18 more
Context. The Medium Resolution Spectrometer (MRS) is one of the four observing modes of JWST/MIRI. Using JWST in-flight data of unresolved (point) sources, we can derive the MRS absolute spectral response function (ASRF) starting from raw data. Spectral fringing, caused by coherent reflections inside the detector arrays, plays a critical role in t…
A 0.9% calibration of the Galactic Cepheid luminosity scale based on Gaia DR3 data of open clusters and Cepheids
Anderson, Richard I.; Cruz Reyes, Mauricio
We have conducted a search for open clusters in the vicinity of classical Galactic Cepheids based on high-quality astrometry from the third data release (DR3) of the ESA mission Gaia to improve the calibration of the Leavitt law (LL). Our approach requires no prior knowledge of existing clusters, allowing us to both detect new host clusters and cr…
Beyond the two-infall model. I. Indications for a recent gas infall with Gaia DR3 chemical abundances
Schultheis, M.; Recio-Blanco, A.; de Laverny, P. +7 more
Context. The recent Gaia Data Release 3 (DR3) represents an unparalleled revolution in Galactic archaeology, providing numerous radial velocities and chemical abundances for millions of stars as well as all-sky coverage. Aims We present a new chemical evolution model for the Galactic disc components (high- and low- α sequence stars) designed to re…