Search Publications
The CARMENES search for exoplanets around M dwarfs. Stable radial-velocity variations at the rotation period of AD Leonis: A test case study of current limitations to treating stellar activity
Amado, P. J.; Bauer, F. F.; Caballero, J. A. +34 more
Context. A challenge with radial-velocity (RV) data is disentangling the origin of signals either due to a planetary companion or to stellar activity. In fact, the existence of a planetary companion has been proposed, as well as contested, around the relatively bright, nearby M3.0 V star AD Leo at the same period as the stellar rotation of 2.23 da…
Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO). I. An updated census of APOGEE N-rich giants across the Milky Way
Beers, Timothy C.; Minniti, Dante; Chiappini, Cristina +9 more
We use the 17th data release of the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) to provide a homogenous census of N-rich red giant stars across the Milky Way (MW). We report a total of 149 newly identified N-rich field giants toward the bulge, metal-poor disk, and halo of our Galaxy. They exhibit significa…
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year
Sunyaev, R.; Krivonos, R.; Sazonov, S. +20 more
We present a first catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory in the 4-12 keV energy band during its ongoing all-sky survey. The catalog comprises 867 sources detected on the combined map of the first two 6-month scans of the sky (December 2019-December 2020), ART-XC sky surveys 1 and 2, or A…
Underestimation of the dust mass in protoplanetary disks: Effects of disk structure and dust properties
Fang, Min; Flock, Mario; Henning, Thomas +6 more
The total number of dust grains in protoplanetary disks is one of the key properties that characterizes the potential for planet formation. With (sub-)millimeter flux measurements, literature studies usually derive the dust mass using an analytic formula under the assumption of optically thin emission, which may lead to a substantial underestimati…
Disentangling the formation mechanisms of nuclear star clusters
Fahrion, Katja; Leaman, Ryan; van de Ven, Glenn +1 more
Nuclear star clusters (NSCs) are massive star clusters found ubiquitously in the centres of galaxies, from the dwarf regime to massive ellipticals and spirals. The fraction of nucleated galaxies is as high as > 90% at Mgal ∼ 109 M⊙. However, how NSC formation mechanisms work in different regimes and what determi…
Near-infrared transmission spectrum of TRAPPIST-1 h using Hubble WFC3 G141 observations
Marcq, E.; Charnay, B.; Mori, M. +4 more
Context. The TRAPPIST-1 planetary system is favourable for transmission spectroscopy and offers the unique opportunity to study rocky planets with possibly non-primary envelopes. We present here the transmission spectrum of the seventh planet of the TRAPPIST-1 system, TRAPPIST-1 h (RP = 0.752 R⊕, Teq = 173 K) using…
Linking stellar populations to H II regions across nearby galaxies. I. Constraining pre-supernova feedback from young clusters in NGC 1672
Boquien, M.; Chevance, M.; Dale, D. A. +32 more
Context. Stellar feedback is one of the fundamental factors regulating the evolution of galaxies. However, we still do not have access to strong observational constraints on the relative importance of the different feedback mechanisms (e.g. radiation, ionised gas pressure, stellar winds) in driving H II region evolution and molecular cloud disrupt…
The resolved scaling relations in DustPedia: Zooming in on the local Universe
Clark, Christopher J. R.; Mosenkov, Aleksandr V.; Baes, Maarten +18 more
Aims: We perform a homogeneous analysis of an unprecedented set of spatially resolved scaling relations (SRs) between interstellar medium (ISM) components, that is to say dust, gas, and gas-phase metallicity, and other galaxy properties, such as stellar mass (Mstar), total baryonic content, and star-formation rate (SFR), in a range…
Sulfur gas-phase abundance in dense cores
Hily-Blant, P.; Pineau des Forêts, G.; Faure, A. +1 more
The abundance of volatile sulfur in dense clouds is long-standing problem in studies of the physics and chemistry of star-forming regions. Sulfur is an important species because its low ionization potential may possibly make it an important charge carrier. The observed sulfur-bearing species in the gas-phase of dense clouds represent only a minor …
Three-dimensional dust density structure of the Orion, Cygnus X, Taurus, and Perseus star-forming regions
Bailer-Jones, C. A. L.; Fouesneau, M.; Dharmawardena, T. E. +1 more
Interstellar dust affects many astronomical observations through absorption and reddening, yet this extinction is also a powerful tool for studying interstellar matter in galaxies. Three-dimensional (3D) reconstructions of dust extinction and density in the Milky Way have suffered from artefacts such as the fingers-of-god effect and negative densi…