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GRB 160410A: The first chemical study of the interstellar medium of a short GRB
D'Avanzo, P.; Campana, S.; Melandri, A. +27 more
Short gamma-ray bursts (SGRBs) are produced by the coalescence of compact binary systems which are remnants of massive stars. GRB 160410A is classified as a short-duration GRB with extended emission and is currently the farthest SGRB with a redshift determined from an afterglow spectrum and also one of the brightest SGRBs to date. The fast reactio…
TOI-1695 b: A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley
López-Morales, Mercedes; Bieryla, Allyson; Latham, David W. +39 more
Characterizing the bulk compositions of transiting exoplanets within the M dwarf radius valley offers a unique means to establish whether the radius valley emerges from an atmospheric mass-loss process or is imprinted by planet formation itself. We present the confirmation of such a planet orbiting an early-M dwarf (T mag = 11.0294 ± 0.…
Simulations of High-redshift [O III] Emitters: Chemical Evolution and Multiline Diagnostics
Yoshida, Naoki; Nakazato, Yurina; Ceverino, Daniel
Recent observations by the James Webb Space Telescope discovered a number of high-redshift galaxies with strong emission lines from doubly ionized oxygen. Combined with Atacama Large Millimeter/submillimeter Array observations of far-infrared lines, multiline diagnostics can be applied to the high-redshift galaxies in order to probe the physical c…
A twisted and precessing Cepheid warp in the outer Milky Way disc
Schönrich, Ralph; Dehnen, Walter; Semczuk, Marcin
We examine the Galactic warp in a sample of all classical Cepheids with Gaia Data Release 3 radial velocity. In each radial bin, we determine (1) the inclined plane normal to the mean orbital angular momentum of the stars and (2) that best fitting their positions. We find no warping inside $R\approx 11\,$kpc; for larger R, the disc is increasingly…
Modelling of the post-asymptotic giant branch phase as a tool to understand asymptotic giant branch evolution and nucleosynthesis
Dell'Agli, F.; Ventura, P.; Van Winckel, H. +3 more
We study a sample of single Galactic post-asymptotic giant branch (post-AGB) stars with known surface chemical composition. Gaia EDR3 and Gaia DR3 parallaxes have enabled accurate determinations of the luminosities of these objects, thus making it possible to characterize them in terms of their initial masses, chemical compositions, and progenitor…
Optical and mid-infrared line emission in nearby Seyfert galaxies
Pozzi, F.; Feltre, A.; Marchetti, L. +24 more
Line ratio diagnostics provide valuable clues as to the source of ionizing radiation in galaxies with intense black hole accretion and starbursting events, such as local Seyfert galaxies or galaxies at the peak of their star formation history. We aim to provide a reference joint optical and mid-IR line ratio analysis for studying active galactic n…
A sample of fast radio bursts discovered and localized with MeerTRAP at the MeerKAT telescope
Prochaska, J. Xavier; Kramer, M.; Wu, J. +14 more
We present a sample of well-localized fast radio bursts (FRBs) discovered by the MeerTRAP project at the MeerKAT telescope in South Africa. We discovered the three FRBs in single coherent tied-array beams and localized them to an area of ~1 arcmin2. We investigate their burst properties, scattering, repetition rates, and localizations i…
Complete replacement of magnetic flux in a flux rope during a coronal mass ejection
Veronig, Astrid M.; Li, Ting; Wang, Yuming +5 more
Solar coronal mass ejections are the most energetic events in the Solar System. In their standard formation model, a magnetic flux rope builds up into a coronal mass ejection through magnetic reconnection that continually converts overlying, untwisted magnetic flux into twisted flux enveloping the pre-existing rope. However, only a minority of cor…
Dynamics of Large-Scale Solar Flows
Gizon, Laurent; Noraz, Quentin; Hotta, Hideyuki +2 more
The Sun's axisymmetric large-scale flows, differential rotation and meridional circulation, are thought to be maintained by the influence of rotation on the thermal-convective motions in the solar convection zone. These large-scale flows are crucial for maintaining the Sun's global magnetic field. Over the last several decades, our understanding o…
Early Results from GLASS-JWST. XV. Properties of the Faintest Red Sources in the NIRCAM Deep Fields
Vulcani, B.; Brammer, G.; Treu, T. +20 more
We present a first look at the reddest 2–5 µm sources found in deep images from the GLASS Early Release Science program. We undertake a general search, i.e., not looking for any particular spectral signatures, for sources detected only in bands redder than is reachable with the Hubble Space Telescope, and which would likely not have been ide…