Search Publications
TIC 308396022: δ Scuti-γ Doradus hybrid with large-amplitude radial fundamental mode and regular g-mode period spacing
Li, Gang; Bedding, Timothy R.; Murphy, Simon J. +3 more
We analyse the pulsating behaviour of TIC 308396022, based on observations by the TESS mission. The star is a high-amplitude δ Sct star that shows a very rich amplitude spectrum using the 3-yr light curve. Among these frequencies, the strongest peak of f1 = 13.20362567(12) d−1 is identified as the radial fundamental mode, and…
Radio observations of massive stars in the Galactic centre: The Arches Cluster
Herrero-Illana, R.; Alberdi, A.; Najarro, F. +8 more
We present high-angular-resolution radio observations of the Arches cluster in the Galactic centre, one of the most massive young clusters in the Milky Way. The data were acquired in two epochs and at 6 and 10 GHz with the Karl G. Jansky Very Large Array. The rms noise reached is three to four times better than during previous observations and we …
Submillimeter imaging of the Galactic Center starburst Sgr B2. Warm molecular, atomic, and ionized gas far from massive star-forming cores
Cernicharo, J.; Goicoechea, J. R.; Etxaluze, M. +2 more
Context. Star-forming galaxies emit bright molecular and atomic lines in the submillimeter and far-infrared (FIR) domains. However, it is not always clear which gas heating mechanisms dominate and which feedback processes drive their excitation.
Aims: The Sgr B2 complex is an excellent template to spatially resolve the main OB-type star-formi…
Heavy-elements heritage of the falling sky
de Laverny, Patrick; Recio-Blanco, Alejandra; Helmi, Amina +3 more
Context. A fundamental element of galaxy formation is the accretion of mass through mergers of satellites or gas. Recent dynamical analyses based on Gaia data have revealed major accretion events in the history of the Milky Way. Nevertheless, our understanding of the primordial Galaxy is hindered because the bona fide identification of the most me…
J-PLUS: The star formation main sequence and rate density at d ≲ 75 Mpc
Hernández-Monteagudo, C.; Galbany, L.; Hernán-Caballero, A. +20 more
Aims: Our goal is to estimate the star formation main sequence (SFMS) and the star formation rate density (SFRD) at z ≤ 0.017 (d ≲ 75 Mpc) using the Javalambre Photometric Local Universe Survey (J-PLUS) first data release, that probes 897.4 deg2 with twelve optical bands.
Methods: We extract the Hα emission flux of 805 local g…
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS. II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541
Werner, K.; Kepler, S. O.; Althaus, L. G. +8 more
Context. The Transiting Exoplanet Survey Satellite (TESS) mission is revolutionizing the blossoming area of asteroseismology, particularly of pulsating white dwarfs and pre-white dwarfs, thus continuing the impulse of its predecessor, the Kepler mission.
Aims: In this paper, we present the observations from the extended TESS mission in both 1…
Observations of a prominence eruption and loop contraction
Joshi, Bhuwan; Schmieder, Brigitte; Joshi, Reetika +3 more
Context. Prominence eruptions provide key observations to understand the launch of coronal mass ejections as their cold plasma traces a part of the unstable magnetic configuration.
Aims: We select a well observed case to derive observational constraints for eruption models.
Methods: We analyze the prominence eruption and loop expansion a…
Simultaneous X-ray and radio observations of the transitional millisecond pulsar candidate CXOU J110926.4-650224. The discovery of a variable radio counterpart
Campana, S.; de Martino, D.; Rea, N. +15 more
We present the results of simultaneous observations of the transitional millisecond pulsar (tMSP) candidate
The RR Lyrae projected density distribution from the Galactic centre to the halo
Minniti, Dante; Ripepi, Vincenzo; Alonso-García, Javier +4 more
The projected density distribution of type ab RR Lyrae (RRab) stars was characterised from the innermost regions of the Milky Way to the halo, with the aim of placing constraints on the Galaxy's evolution. The compiled sample (NRRab = 64 850) stems from fundamental mode RR Lyrae variables identified by the VVV, OGLE, and Gaia surveys. T…
The Fornax3D project: Planetary nebulae catalogue and independent distance measurements to Fornax cluster galaxies
Viaene, S.; Morelli, L.; Pinna, F. +17 more
Extragalactic planetary nebulae (PNe) offer a way to determine the distance to their host galaxies thanks to the nearly universal shape of the planetary nebulae luminosity function (PNLF). Accurate PNe distance measurements rely on obtaining well-sampled PNLFs and the number of observed PNe scales with the encompassed stellar mass. This means eith…