Search Publications
Variable stars in galactic globular clusters. I. The population of RR Lyrae stars
Anderson, Richard I.; Cruz Reyes, Mauricio; Netzel, Henryka +2 more
We present a comprehensive catalog of 2824 RR Lyrae stars (RRLs) residing in 115 Galactic globular clusters (GCs). Our catalog includes 1594 fundamental-mode (RRab), 824 first-overtone (RRc), and 28 double-mode (RRd) RRLs, as well as 378 RRLs of an unknown pulsation mode. We cross-matched 481 349 RRLs reported in the third Data Release (DR3) of th…
Age-dating the young open cluster UBC 1 with g-mode asteroseismology, gyrochronology, and isochrone fitting
Aerts, C.; Li, G.; Van Reeth, T. +3 more
Aims: UBC 1 is an open cluster discovered in Gaia data and located near the edge of the Transiting Exoplanet Survey Satellite's (TESS) continuous viewing zone. We aim to provide age constraints for this poorly studied open cluster from the combination of gravity-mode (g-mode) asteroseismology, gyrochronology, and isochrone fitting.
Metho…
Linking Mg II and [O II] spatial distribution to ionizing photon escape in confirmed LyC leakers and non-leakers
Blaizot, Jérémy; Verhamme, Anne; Scarlata, Claudia +29 more
The geometry of the neutral gas in and around galaxies is a key regulator of the escape of ionizing photons. We present the first statistical study aimed at linking the neutral and ionized gas distributions to the Lyman continuum (LyC) escape fraction (fescLyC) in a sample of 22 confirmed LyC leakers and non-leakers at z ≈ 0.…
Uniting Gaia and APOGEE to unveil the cosmic chemistry of the Milky Way disc
Casey, Andrew R.; Rix, Hans-Walter; Brown, Anthony G. A. +6 more
The spatial distribution of Galactic stars with different chemical abundances encodes information on the processes that drove the formation and evolution of the Milky Way. Survey selection functions are indispensable for analysing astronomical catalogues produced by large-scale surveys. The use of these selection functions in data modelling is mor…
Dust mineralogy and variability of the inner PDS 70 disk: Insights from JWST/MIRI MRS and Spitzer IRS observations
Henning, Thomas; Güdel, Manuel; Lagage, Pierre-Olivier +17 more
Context. The inner disk of the young star PDS 70 may be a site of rocky planet formation, with two giant planets detected further out. Recently, James Webb Space Telescope/Mid-Infrared Instrument (JWST/MIRI) Medium-Resolution Spectrometer (MRS) observations have revealed the presence of warm water vapour in the inner disk. Solids in the inner disk…
LOFAR detection of extended emission around a mini halo in the galaxy cluster Abell 1413
Rossetti, M.; Shimwell, T. W.; Gastaldello, F. +14 more
Context. The relation between giant radio halos and mini halos in galaxy clusters is not understood. The former are usually associated with merging clusters, while the latter are found in relaxed systems. In recent years, the advent of low-frequency radio observations has challenged this dichotomy by finding intermediate objects with a hybrid radi…
No evidence of active galactic nucleus features in the nuclei of Arp 220 from JWST/NIRSpec IFS
Charlot, Stéphane; Übler, Hannah; D'Eugenio, Francesco +12 more
Context. Arp 220 is the nearest ultra-luminous infrared galaxy. It shows evidence of 100 pc scale molecular outflows that are likely connected with galaxy-scale outflows traced by ionised and neutral gas. The two highly obscured nuclei of Arp 220 are sites of intense star formation, with extreme (far-infrared based) star formation rate surface den…
Radial evolution of the accuracy of ballistic solar wind backmapping
Maksimovic, M.; Démoulin, P.; Badman, S. T. +4 more
Context. Solar wind backmapping is a technique employed to connect in situ measurements of heliospheric plasma structures to their origin near the Sun. The most widely used method is ballistic mapping, which neglects the effects of solar wind acceleration and corotation and instead models the solar wind as a constant radial outflow whose speed is …
Feedback and ionized gas outflows in four low-radio power AGN at z ∼ 0.15
Maiolino, R.; Treister, E.; Tomicic, N. +19 more
An increasing number of observations and simulations suggests that low-power (< 1044 erg s−1) jets may be a significant channel of feedback produced by active galactic nuclei (AGN), but little is known about their actual effect on their host galaxies from the observational point of view. We targeted four luminous type 2 AG…
The photospheres of the hottest fastest stars in the Galaxy
El-Badry, Kareem; Rauch, Thomas; Werner, Klaus +2 more
We perform nonlocal thermodynamic equilibrium (NLTE) model atmosphere analyses of the three hottest hypervelocity stars (space velocities between ≈1500-2800 km s−1) known to date, which were recently discovered spectroscopically and identified as runaways from Type Ia supernovae. The hottest of the three (J0546+0836, effective temperatu…