Search Publications
Revised planet brightness temperatures using the Planck/LFI 2018 data release
Tomasi, Maurizio; Romelli, Erik; Maris, Michele +7 more
Aims: We present new estimates of the brightness temperatures of Jupiter, Saturn, Uranus, and Neptune based on the measurements carried in 2009-2013 by Planck/LFI at 30, 44, and 70 GHz and released to the public in 2018. This work extends the results presented in the 2013 and 2015 Planck/LFI Calibration Papers, based on the data acquired in 2…
Astrometric measurement and reduction of Pulkovo photographic observations of the main Saturnian satellites from 1972 to 2007 in the Gaia reference frame
Narizhnaya, N. V.; Apetyan, A. A.; Bikulova, D. A. +3 more
Context. We present a remeasurement of old photographic plates, providing important raw data for dynamical studies of the Saturnian satellite system. The unprecedentedly accurate realization of the Gaia reference frame allows us to make a precise calibration of digitized astronegatives of the Saturnian satellite images.
Aims: We reprocessed 3…
Abundance of barium in the atmospheres of red giants in the Galactic globular cluster NGC 104 (47 Tuc)
Korotin, S.; Kučinskas, A.; Kolomiecas, E. +2 more
Context. While most (if not all) Type I Galactic globular clusters (GGCs) are characterised by spreads in the abundances of light chemical elements (e.g. Li, N, O, Na, Mg, Al), it is not yet well established whether similar spreads may exist in s-process elements as well.
Aims: We investigated the possible difference in Ba abundance between t…
Capturing dual AGN activity and kiloparsec-scale outflows in IRAS 20210+1121
Fiore, F.; Vignali, C.; Piconcelli, E. +8 more
The most standard scenario for the evolution of massive galaxies across cosmic time assumes a correspondence based on the interplay between active galactic nuclei (AGN) feedback, which injects large amounts of energy into the host environment, and galaxy mergers, with their ability to trigger massive star formation events and accretion onto superm…
Detection of volatiles undergoing sublimation from 67P/Churyumov-Gerasimenko coma particles using ROSINA/COPS. II. The nude gauge
Altwegg, K.; Balsiger, H.; Rubin, M. +5 more
Context. In an earlier study, we reported that the ram gauge of the COmet Pressure Sensor (COPS), one of the three instruments of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA), could be used to obtain information about the sublimating content of icy particles, made up of volatiles and conceivably refractories coming from c…
Limits on the contribution of early endogenous radiolysis to oxidation in carbonaceous chondrites' parent bodies
Mousis, Olivier; Miller, Kelly E.; Bouquet, Alexis +1 more
Context. Carbonaceous chondrites have undergone alteration in their parent bodies and display oxidized secondary phases, including sulfates in CI and CM chondrites. The cause of the formation of these sulfates is yet to be determined.
Aims: This study investigates the potential of endogenous radiolysis of water (i.e., radiolysis caused by rad…
Tracing the magnetic field morphology of the LDN 1172/1174 cloud complex
Kim, Shinyoung; Sharma, Ekta; Saha, Piyali +3 more
Context. The LDN 1172/1174 cloud complex in the Cepheus Flare region presents a hub-filament structure with the reflection nebula, NGC 7023, illuminated by a Herbig Be star, HD 200775, which consists of the hub with a ~5 pc long narrow filament attached to it. Formation of a sparse cluster of low- and intermediate-mass stars is presently taking pl…
SP_Ace v1.4 and the new GCOG library for deriving stellar parameters and elemental abundances
Vallenari, A.; Lucatello, S.; Boeche, C.
Context. Ongoing and future massive spectroscopic surveys will collect very large numbers (106-107) of stellar spectra that need to be analyzed. Highly automated software is needed to derive stellar parameters and chemical abundances from these spectra.
Aims: We present the new version of SP_Ace (Stellar Parameters And C…
Mapping a duck: geological features and region definitions on comet 67P/Churyumov-Gerasimenko
Küppers, M.; Besse, S.; Grieger, B. +1 more
The data from the Rosetta mission have permitted a reconstruction of the shape of comet 67P/Churyumov-Gerasimenko and an identification of the terrains and features forming the surface. The peculiar shape of the comet has made it challenging to project these geological features onto an unambiguous frame. As a result, the geological maps published …
AGB and RGB stars in the dwarf irregular galaxy Leo A
Stonkutė, Rima; Vansevičius, Vladas; Leščinskaitė, Alina
Context. Leo A is a gas-rich dwarf irregular galaxy of low stellar mass located in the outskirts of the Local Group. It has an extended star formation history with stellar populations spanning a wide age range (∼0.01−10 Gyr). As Leo A is a well-isolated dwarf galaxy, it is a perfect target to study a galactic structure formed entirely by processes…