Search Publications
Signature of systemic rotation in 21 galactic globular clusters from APOGEE-2
Minniti, Dante; Schiavon, Ricardo P.; Lane, Richard R. +2 more
Context. Traditionally, globular clusters (GCs) have been assumed to be quasi-relaxed non-rotating systems, characterized by spherical symmetry and orbital isotropy. However, in recent years, a growing set of observational evidence has been unveiling an unexpected dynamical complexity in Galactic GCs. Indeed, kinematic studies have demonstrated th…
Evolution of X-ray galaxy cluster properties in a representative sample (EXCPReS). Optimal binning for temperature profile extraction
Arnaud, M.; Pointecouteau, E.; Pratt, G. W. +2 more
We present XMM-Newton observations of a representative X-ray selected sample of 31 galaxy clusters at moderate redshift (0.4 < z < 0.6), spanning the mass range 1014 < M500 < 1015 M⊙. This sample, EXCPReS (Evolution of X-ray galaxy Cluster Properties in a Representative Sample), is used to te…
A comprehensive search for hot subdwarf stars using Gaia and TESS. I. Pulsating hot subdwarf B stars
Uzundag, Murat; Pelisoli, Ingrid; Németh, Péter +5 more
Hot subdwarf B (sdB) stars are evolved, subluminous, helium-burning stars that most likely form when red giant stars loose their hydrogen envelope via interactions with close companions. They play an important role in our understanding of binary evolution, stellar atmospheres, and interiors. Only a small fraction of the sdB population is known to …
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey. V. New multiband (grizJHKs) Cepheid light curves and period-luminosity relations
Ripepi, V.; Molinaro, R.; Marconi, M. +8 more
Context. The highly debated effect of metallicity on the absolute magnitudes of classical Cepheid variables needs to be properly quantified for determining accurate and precise distances based on their Leavitt Law.
Aims: Our goal is to obtain homogeneous optical and near-infrared light curves of Milky Way Cepheid variables complementing their…
Surveys of clumps, cores, and condensations in Cygnus-X. SMA observations of SiO (5−4)
Qiu, Keping; Yang, Kai; Pan, Xing
Context. The SiO emissions are usually used to trace high-velocity outflow shocks in star-forming regions. However, several studies have found low-velocity and widespread SiO emissions not associated with outflows in molecular clouds.
Aims: We aim to detect and characterize the SiO emissions in massive dense cores (MDCs), and explore the prop…
Evidence for enhanced star formation rates in z ∼ 0.35 cluster galaxies undergoing ram pressure stripping
Richard, Johan; Fritz, Jacopo; Vulcani, Benedetta +6 more
Ram-pressure stripping (RPS) is the mechanism most often invoked to explain the observed differences between cluster and field galaxies. In the local Universe, its effect on the star-forming properties of the galaxies has been largely elucidated and the general consensus is that this process first compresses the gas available in galaxy disks, boos…
CO emission survey of asymptotic giant branch stars with ultraviolet excesses
Sahai, R.; Sánchez Contreras, C.; Alonso-Hernández, J.
Context. The transition from the spherically symmetric envelopes around asymptotic giant branch (AGB) stars to the asymmetric morphologies observed in planetary nebulae is still not well understood, and the shaping mechanisms are a subject of debate. Even though binarity is widely accepted as a promising option, it is limited by the complication o…
3D non-local thermodynamic equilibrium magnesium abundances reveal a distinct halo population
Carlos, M.; Amarsi, A. M.; Nissen, P. E. +1 more
Magnesium is one of the most important elements in stellar physics as an electron donor; in Galactic archaeology, magnesium serves to distinguish different stellar populations. However, previous studies of Mg I and Mg II lines in metal-poor benchmark stars indicate that magnesium abundances inferred from one-dimensional (1D), hydrostatic models of…
Gas, not dust: Migration of TESS/Gaia hot Jupiters possibly halted by the magnetospheres of protoplanetary disks
Montesinos, B.; Mendigutía, I.; Huélamo, N. +4 more
Context. The presence of short-period (< 10 days) planets around main sequence (MS) stars has been associated either with the dust-destruction region or with the magnetospheric gas-truncation radius in the protoplanetary disks that surround them during the pre-MS phase. However, previous analyses have only considered low-mass FGK stars, making …
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): HD 34700 A unveils an inner ring
Rab, C.; Ginski, C.; Dominik, C. +18 more
Context. The study of protoplanetary disks is fundamental to understand their evolution and interaction with the surrounding environment, and to constrain planet formation mechanisms.
Aims: We aim to characterise the young binary system HD 34700 A, which shows a wealth of structures.
Methods: Taking advantage of the high-contrast imaging…