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The quasar feedback survey: discovering hidden Radio-AGN and their connection to the host galaxy ionized gas
Thomson, A. P.; Alexander, D. M.; Mainieri, V. +18 more
We present the first results from the Quasar Feedback Survey, a sample of 42 z < 0.2, [O III] luminous AGNs ( L[O III] > 1042.1 ergs s-1) with moderate radio luminosities (i.e. L1.4GHz > 1023.4 W Hz-1; median L1.4GHz = 5.9 × 1023 W Hz-1). Us…
RoboPol: AGN polarimetric monitoring data
Pearson, T. J.; Papadakis, I.; Blinov, D. +29 more
We present uniformly reprocessed and re-calibrated data from the RoboPol programme of optopolarimetric monitoring of active galactic nuclei (AGNs), covering observations between 2013, when the instrument was commissioned, and 2017. In total, the data set presented in this paper includes 5068 observations of 222 AGN with Dec. > -25○. …
Dwarf Galaxies in the MATLAS Survey: Hubble Space Telescope Observations of the Globular Cluster System in the Ultra-diffuse Galaxy MATLAS-2019
Emsellem, Eric; Müller, Oliver; Agnello, Adriano +11 more
Ultra-diffuse galaxies (UDGs) are very-low-surface-brightness galaxies with large effective radii. Spectroscopic measurements of a few UDGs have revealed a low dark-matter content based on the internal motion of stars or globular clusters (GCs). This is in contrast to the large number of GCs found for these systems, from which it would be expected…
White Dwarf Subsystems in Core-Collapsed Globular Clusters
Rui, Nicholas Z.; Rodriguez, Carl L.; Chatterjee, Sourav +5 more
Numerical and observational evidence suggests that massive white dwarfs dominate the innermost regions of core-collapsed globular clusters by both number and total mass. Using NGC 6397 as a test case, we constrain the features of white dwarf populations in core-collapsed clusters, both at present day and throughout their lifetimes. The dynamics of…
Anisotropy of Solar Wind Turbulence in the Inner Heliosphere at Kinetic Scales: PSP Observations
Chen, Christopher H. K.; He, Jiansen; Bale, Stuart D. +5 more
The anisotropy of solar wind turbulence is a critical issue in understanding the physics of energy transfer between scales and energy conversion between fields and particles in the heliosphere. Using the measurement of Parker Solar Probe (PSP), we present an observation of the anisotropy at kinetic scales in the slow, Alfvénic, solar wind in the i…
PHANGS-HST: star cluster spectral energy distribution fitting with CIGALE
Van Dyk, Schuyler D.; Kruijssen, J. M. Diederik; Leroy, Adam K. +24 more
The sensitivity and angular resolution of photometric surveys executed by the Hubble Space Telescope (HST) enable studies of individual star clusters in galaxies out to a few tens of megaparsecs. The fitting of spectral energy distributions (SEDs) of star clusters is essential for measuring their physical properties and studying their evolution. W…
A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
Fridlund, M.; Pallé, E.; Guenther, E. W. +63 more
We report the discovery and characterization of two transiting planets around the bright M1 V star LP 961-53 (TOI-776, J = 8.5 mag, M = 0.54 ± 0.03 M ⊙) detected during Sector 10 observations of the Transiting Exoplanet Survey Satellite (TESS). Combining the TESS photometry with HARPS radial velocities, as well as ground-based follow-up…
The non-linear infrared-radio correlation of low-z galaxies: implications for redshift evolution, a new radio SFR recipe, and how to minimize selection bias
Zamorani, Giovanni; Schinnerer, Eva; Vardoulaki, Eleni +7 more
The infrared-radio correlation (IRRC) underpins many commonly used radio luminosity-star formation rate (SFR) calibrations. In preparation for the new generation of radio surveys, we revisit the IRRC of low-z galaxies by (a) drawing on the best currently available infrared (IR) and 1.4 GHz radio photometry, plus ancillary data over the widest poss…
The Gaia-ESO survey: Mixing processes in low-mass stars traced by lithium abundance in cluster and field stars
Baratella, M.; Gilmore, G.; Bayo, A. +42 more
Aims: We aim to constrain the mixing processes in low-mass stars by investigating the behaviour of the Li surface abundance after the main sequence. We take advantage of the data from the sixth internal data release of Gaia-ESO, IDR6, and from the Gaia Early Data Release 3, EDR3s.
Methods: We selected a sample of main-sequence, sub-giant…
Long-term X-ray spectral evolution of ultraluminous X-ray sources: implications on the accretion flow geometry and the nature of the accretor
Godet, O.; Webb, N.; Olive, J. -F. +2 more
Context. The discovery of pulsations in several ultraluminous X-ray sources (ULXs) has demonstrated that a fraction of them are powered by super-Eddington accretion onto neutron stars (NSs). This has raised questions regarding the NS to black hole (BH) ratio within the ULX population and the physical mechanism that allows ULXs to reach luminositie…