Search Publications
Kinematics and star formation of hub-filament systems in W49A
Li, Dalei; Tang, Xindi; Zhou, Jianjun +11 more
Aims: W49A is a prominent giant molecular cloud (GMC) that exhibits strong star formation activities, yet its structural and kinematic properties remain uncertain. Our study aims to investigate the large-scale structure and kinematics of W49A, and elucidate the role of filaments and hub-filament systems (HFSs) in its star formation activity. …
Solar Energetic Proton Fluxes in Near-Earth Space on March 13-23, 2023
Vlasova, N. A.; Bazilevskaya, G. A.; Ginzburg, E. A. +5 more
The results of studying the fluxes of solar protons with energies greater than 5 MeV in near-Earth space on March 13-23, 2023, are presented. The features of the period under study are no visible solar flare with which the beginning of the event could be associated and an untypical time profile of proton fluxes, as well as a long duration of the e…
Diffuse interstellar bands in the near-infrared: expanding the reddening range
Najarro, F.; Geballe, T. R.; Garcia, M. +2 more
We have investigated the behaviour of three strong near-infrared diffuse interstellar bands (DIBs) at λ13177 Å, λ14680 Å, and λ15272 Å, on a larger sample of sightlines and over a wider range of extinctions than previously studied, utilizing spectra from three observatories. We applied two telluric correction techniques to reduce atmospheric conta…
Probing the strength of radial migration via churning by using metal-rich red giant stars from APOGEE
Kordopatis, Georges; Feltzing, Sofia; Lehmann, Christian +1 more
Making use of the APOGEE DR17 catalogue with high quality data for 143 509 red giant branch stars we explore the strength of different mechanisms that causes a star to radially migrate in the Milky Way stellar disc. At any position in the disc we find stars that are more metal-rich than the local interstellar medium. This is surprising and normall…
Production of s-process elements in asymptotic giant branch stars as revealed by Gaia/GSP-Spec abundances
Recio-Blanco, A.; de Laverny, P.; Contursi, G. +2 more
Context. The recent parameterisation by the GSP-Spec module of Gaia/Radial Velocity Spectrometer stellar spectra has produced an homogeneous catalogue of about 174 000 asymptotic giant branch (AGB) stars. Among the 13 chemical elements presented in this Gaia third data release, the abundance of two of them (cerium and neodymium) have been estimate…
The Massive and Distant Clusters of WISE Survey 2: A Stacking Analysis Investigating the Evolution of Star Formation Rates and Stellar Masses in Groups and Clusters
Alberts, Stacey; Connor, Thomas; Eisenhardt, Peter R. M. +8 more
The evolution of galaxies depends on their masses and local environments; understanding when and how environmental quenching starts to operate remains a challenge. Furthermore, studies of the high-redshift regime have been limited to massive cluster members, owing to sensitivity limits or small fields of view when the sensitivity is sufficient, in…
Short-term variability of the transitional pulsar candidate CXOU J110926.4‑650224 from X-rays to infrared
D'Avanzo, P.; Campana, S.; de Martino, D. +14 more
CXOU J110926.4‑650224 is a candidate transitional millisecond pulsar (tMSP) with X-ray and radio emission properties reminiscent of those observed in confirmed tMSPs in their X-ray 'subluminous' disc state. We present the results of observing campaigns that, for the first time, characterise the optical and near-infrared variability of this source …
eUDS: the SRG/eROSITA X-ray survey of the UKIDSS Ultra Deep Survey field. Catalogue of sources
Sunyaev, R.; Krivonos, R.; Sazonov, S. +2 more
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) spacecraft observed the field of the UKIDSS Ultra-Deep Survey (UDS) in August-September 2019, during its flight to Sun-Earth L2 point. The resulting eROSITA UDS (or eUDS) survey was thus the first eROSITA X-ray imaging survey, which demonstrated the capability of the telescope …
Dealing with broad-band X-ray spectra of faint AGN: a case study
Malizia, A.; Bassani, L.; Molina, M.
In this work, we analyse three average-luminosity hard X-ray selected AGN: ESO 506-G27, IGR J19039+3344, and NGC 7465. They have simultaneous Swift/XRT and NuSTAR data never published before and have been poorly studied at X-ray energies. These sources make for interesting targets both from a methodological and scientific point of view. Scientific…
Disentangling the dust and gas contributions of the JWST/MIRI spectrum of Sz 28
Woitke, P.; Kamp, I.; Min, M. +2 more
Context. Recent spectra of protoplanetary disks around very low-mass stars (VLMS), captured by the Mid-InfraRed Instrument (MIRI) on board the James Webb Space Telescope (JWST), reveal a rich carbon chemistry. Current interpretations of these spectra are based on 0D slab models and provide valuable estimates for molecular emission temperatures and…