Search Publications
The Corona Australis star formation complex is accelerating away from the Galactic plane
Meingast, Stefan; Alves, João; Zucker, Catherine +5 more
We study the kinematics of the recently discovered Corona Australis (CrA) chain of clusters by examining the 3D space motion of its young stars using Gaia DR3 and APOGEE-2 data. While we observe linear expansion between the clusters in the Cartesian XY directions, the expansion along Z exhibits a curved pattern. To our knowledge, this is the first…
Linking the dust and chemical evolution: Taurus and Perseus. New collisional rates for HCN, HNC, and their C, N, and H isotopologues
Roueff, E.; Sarazin, C. L.; Kramer, C. +18 more
Context. HCN, HNC, and their isotopologues are ubiquitous molecules that can serve as chemical thermometers and evolutionary tracers to characterize star-forming regions. Despite their importance in carrying information that is vital to studies of the chemistry and evolution of star-forming regions, the collision rates of some of these molecules h…
Supermassive Black Hole Winds in X-rays: SUBWAYS. II. HST UV spectroscopy of winds at intermediate redshifts
Kaastra, J. S.; Kriss, G. A.; Bianchi, S. +35 more
We present a UV spectroscopic study of ionized outflows in 21 active galactic nuclei (AGN), observed with the Hubble Space Telescope (HST). The targets of the Supermassive Black Hole Winds in X-rays (SUBWAYS) sample were selected with the aim to probe the parameter space of the underexplored AGN between the local Seyfert galaxies and the luminous …
Brightness and mass accretion rate evolution during the 2022 burst of EX Lupi
Lykou, F.; Varga, J.; Kóspál, Á. +18 more
Context. EX Lupi is the prototype by which EXor-type outbursts have been defined. It has experienced multiple accretion-related bursts and outbursts throughout the past decades, and the study of these events has greatly extended our knowledge about their effects. Notably, this star experienced a new burst in 2022.
Aims: We aim to investigate …
Time evolution of Ce as traced by APOGEE using giant stars observed with the Kepler, TESS and K2 missions
Chiappini, C.; Tailo, M.; Miglio, A. +11 more
Context. Abundances of slow neutron-capture process (s-process) elements in stars with exquisite asteroseismic, spectroscopic, and astrometric constraints offer a novel opportunity to study stellar evolution, nucleosynthesis, and Galactic chemical evolution.
Aims: We investigate one of the least studied s-process elements in the literature, c…
A fresh perspective on the 3D dynamics of Tycho's supernova remnant: Ejecta asymmetries in the X-ray band
Ballet, J.; Decourchelle, A.; Acero, F. +1 more
Context. Even 450 yr after the explosion of the Type Ia SN 1572, the dynamics of the Tycho supernova remnant (Tycho's SNR) can offer keys to improving our understanding of the explosion mechanism and the interaction of the remnant with the interstellar medium.
Aims: To probe the asymmetries and the evolution of the SNR, we tracked the ejecta …
Revealing the structure of the lensed quasar Q 0957+561. III. Constraints on the size of the broad-line region
Hanslmeier, A.; Muñoz, J. A.; Mediavilla, E. +6 more
Aims: Our aim is to examine the size, kinematics, and geometry of the broad-line region (BLR) in the double-lensed quasar Q 0957+561 by analyzing the impact of microlensing on various rest-frame ultraviolet broad-emission lines (BELs).
Methods: We explore the influence of intrinsic variability and microlensing on the C IV, C III], and Mg…
Acceleration of suprathermal protons near an interplanetary shock
Wang, L.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +12 more
Context. Interplanetary collisionless shocks are known to be sources of energetic charged particles up to hundreds of MeV. However, the underlying acceleration mechanisms are still under debate.
Aims: We determine the properties of suprathermal protons accelerated by the interplanetary shock on 2021 November 3 with the unprecedented high-reso…
Transition disc nature of post-AGB binary systems confirmed by mid-infrared interferometry
Cuello, N.; Mérand, A.; Van Winckel, H. +4 more
Context. Many properties of circumbinary discs around evolved post-asymptotic giant branch (post-AGB) binary systems are similar to those of protoplanetary discs around young stars. The deficits of near-infrared (near-IR) flux in the spectral energy distributions (SEDs) of these systems hints towards large dust-free cavities that are reminiscent o…
JOYS: Disentangling the warm and cold material in the high-mass IRAS 23385+6053 cluster
Östlin, G.; Güdel, M.; Ray, T. P. +20 more
Context. High-mass star formation occurs in a clustered mode where fragmentation is observed from an early stage onward. Young protostars can now be studied in great detail with the recently launched James Webb Space Telescope (JWST).
Aims: We study and compare the warm (>100 K) and cold (<100 K) material toward the high-mass star-formi…