Search Publications
The typical width of Herschel filaments
Arzoumanian, D.; Palmeirim, P.; André, P. J.
Context. Dense molecular filaments are widely believed to be representative of the initial conditions of star formation in interstellar clouds. Characterizing their physical properties, such as their transverse size, is therefore of paramount importance. Herschel studies suggest that nearby (d < 500 pc) molecular filaments have a typical half-p…
Gyrochronological dating of the stellar moving group Group X
Baratella, M.; Messina, S.; D'Orazi, V. +4 more
Context. Gyrochronology is one of the methods currently used to estimate the age of stellar open clusters. Hundreds of new clusters, associations, and moving groups unveiled by Gaia and complemented by accurate rotation period measurements provided by recent space missions such as Kepler and TESS are allowing us to significantly improve the reliab…
The eROSITA Final Equatorial-Depth Survey (eFEDS). A multiwavelength view of WISE mid-infrared galaxies/active galactic nuclei
Nandra, Kirpal; Imanishi, Masatoshi; Wada, Keiichi +21 more
Aims: We investigate the physical properties - such as the stellar mass (M*), star-formation rate, infrared (IR) luminosity (LIR), X-ray luminosity (LX), and hydrogen column density (NH) - of mid-IR (MIR) galaxies and active galactic nuclei (AGN) at z < 4 in the 140 deg2 field observed…
Detections of solar-like oscillations in dwarfs and subgiants with Kepler DR25 short-cadence data
García, R. A.; Mosser, B.; Mathur, S. +6 more
During the survey phase of the Kepler mission, several thousand stars were observed in short cadence, allowing for the detection of solar-like oscillations in more than 500 main-sequence and subgiant stars. These detections showed the power of asteroseismology in determining fundamental stellar parameters. However, the Kepler Science Office discov…
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…