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The X-CLASS survey: A catalogue of 1646 X-ray-selected galaxy clusters up to z ∼ 1.5
Altieri, B.; Valtchanov, I.; Pierre, M. +25 more
Context. Cosmological probes based on galaxy clusters rely on cluster number counts and large-scale structure information. X-ray cluster surveys are well suited for this purpose because they are far less affected by projection effects than optical surveys, and cluster properties can be predicted with good accuracy.
Aims: The XMM Cluster Archi…
Don't cross the streams: caustics from fuzzy dark matter
Bovy, Jo; Dalal, Neal; Hui, Lam +1 more
We study how tidal streams from globular clusters may be used to constrain the mass of ultra-light dark matter particles, called `fuzzy' dark matter (FDM). A general feature of FDM models is the presence of ubiquitous density fluctuations in bound, virialized dark matter structures, on the scale of the de Broglie wavelength, arising from wave inte…
Stellar flares detected with the Next Generation Transit Survey
Jackman, James A. G.; Wheatley, Peter J.; Bayliss, Daniel +19 more
We present the results of a search for stellar flares in the first data release from the Next Generation Transit Survey (NGTS). We have found 610 flares from 339 stars, with spectral types between F8 and M6, the majority of which belong to the Galactic thin disc. We have used the 13-s cadence NGTS light curves to measure flare properties such as t…
Infrared emission of z ∼ 6 galaxies: AGN imprints
Ferrara, A.; Vito, F.; Pallottini, A. +6 more
We investigate the infrared (IR) emission of high-redshift (z ∼ 6), highly star-forming ( ${{\rm SFR}\gt 100\,{\rm M}_{\odot }\, {\rm yr}^{-1}}$ ) galaxies, with/without active galactic nuclei (AGN), using a suite of cosmological simulations featuring dust radiative transfer. Synthetic spectral energy distributions (SEDs) are used to quantify the …
SPLUS J210428.01-004934.2: An Ultra Metal-poor Star Identified from Narrowband Photometry
Lee, Young Sun; Placco, Vinicius M.; Roederer, Ian U. +6 more
We report on the discovery of SPLUS J210428.01-004934.2, an ultra metal-poor (UMP) star first identified from the narrowband photometry of the Southern Photometric Local Universe Survey (S-PLUS) Data Release 1, in the SDSS Stripe 82 region. Follow-up medium- and high-resolution spectroscopy (with Gemini South and Magellan-Clay, respectively) confi…
Stellar Rotation of T Tauri Stars in the Orion Star-forming Complex
Stassun, Keivan G.; Kounkel, Marina; Briceño, Cesar +14 more
We present a large-scale study of stellar rotation for T Tauri stars in the Orion star-forming complex. We use the projected rotational velocity ( $v\sin (i)$ vsin(i) ) estimations reported by the APOGEE-2 collaboration as well as individual masses and ages derived from the position of the stars in the HR diagram, considering Gaia-EDR3 parallaxes …
First light observations of the solar wind in the outer corona with the Metis coronagraph
Heinzel, P.; Vial, J. -C.; Woch, J. +65 more
In this work, we present an investigation of the wind in the solar corona that has been initiated by observations of the resonantly scattered ultraviolet emission of the coronal plasma obtained with UVCS-SOHO, designed to measure the wind outflow speed by applying Doppler dimming diagnostics. Metis on Solar Orbiter complements the UVCS spectroscop…
A Detailed Characterization of HR 8799's Debris Disk with ALMA in Band 7
Stapelfeldt, Karl R.; Hales, Antonio S.; Casassus, Simon +8 more
The exoplanetary system of HR 8799 is one of the rare systems in which multiple planets have been directly imaged. Its architecture is strikingly similar to that of the solar system, with the four imaged giant planets surrounding a warm dust belt analogous to the Asteroid Belt, and themselves being surrounded by a cold dust belt analog to the Kuip…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. II. Are local ULIRGs powered by AGN? The subkiloparsec view of the 220 GHz continuum
Rigopoulou, D.; Colina, L.; van der Werf, P. +11 more
We analyze new high-resolution (400 pc) ∼220 GHz continuum and CO(2-1) Atacama Large Millimeter Array (ALMA) observations of a representative sample of 23 local (z < 0.165) ultra-luminous infrared systems (ULIRGs; 34 individual nuclei) as part of the "Physics of ULIRGs with MUSE and ALMA" (PUMA) project. The deconvolved half-light radii of the …
HST grism spectroscopy of z ∼ 3 massive quiescent galaxies. Approaching the metamorphosis
Cimatti, A.; Daddi, E.; Gobat, R. +6 more
Tracing the emergence of the massive quiescent galaxy (QG) population requires the build-up of reliable quenched samples by distinguishing these systems from red, dusty star-forming sources. We present Hubble Space Telescope WFC3/G141 grism spectra of ten quiescent galaxy candidates selected at 2.5 < z < 3.5 in the COSMOS field. Spectroscopi…