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HOLISMOKES: XI. Evaluation of supervised neural networks for strong-lens searches in ground-based imaging surveys
Suyu, S. H.; Cañameras, R.; Schuldt, S. +10 more
While supervised neural networks have become state of the art for identifying the rare strong gravitational lenses from large imaging data sets, their selection remains significantly affected by the large number and diversity of non-lens contaminants. This work evaluates and compares systematically the performance of neural networks in order to mo…
A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys inferred from JWST imaging
Conselice, Christopher J.; Ho, Luis C.; Babul, Arif +13 more
Bright galaxies at submillimetre wavelengths from Herschel are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this strongly lensed population also predict about 1 per cent of faint 450 µm-selected galaxies from deep James Clerk Maxwell Telescope (JCMT) surveys will also be stro…
JWST Observations of Young protoStars (JOYS). Linked accretion and ejection in a Class I protobinary system
Güdel, Manuel; Le Gouellec, Valentin J. M.; Beuther, Henrik +19 more
Context. Accretion and ejection dictate the outcomes of star and planet formation processes. The mid-infrared (MIR) wavelength range offers key tracers of processes that have been difficult to detect and spatially resolve in protostars until now.
Aims: We aim to characterize the interplay between accretion and ejection in the low-mass Class I…
GATOS: missing molecular gas in the outflow of NGC 5728 revealed by JWST
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +49 more
The ionisation cones of NGC 5728 have a deficit of molecular gas based on millimetre observations of CO (2-1) emission. Although photoionisation from the active nucleus may lead to suppression of this transition, warm molecular gas can still be present. We report the detection of eight mid-infrared rotational H2 lines throughout the cen…
A Fast Radio Burst in a Compact Galaxy Group at z ∼ 1
Kilpatrick, Charles D.; Simha, Sunil; Prochaska, J. Xavier +14 more
FRB 20220610A is a high-redshift fast radio burst (FRB) that has not been observed to repeat. Here, we present rest-frame UV and optical Hubble Space Telescope observations of the field of FRB 20220610A. The imaging reveals seven extended sources, one of which we identify as the most likely host galaxy with a spectroscopic redshift of z = 1.017. W…
MUSEQuBES: mapping the distribution of neutral hydrogen around low-redshift galaxies
Wisotzki, Lutz; Chen, Hsiao-Wen; Cantalupo, Sebastiano +5 more
We present a detailed study of cool, neutral gas traced by Lyα around 4595 z < 0.5 galaxies using stacks of background quasar spectra. The galaxies are selected from our MUSEQuBES low-z survey along with data from the literature. These galaxies, with a median stellar mass of ${\rm log}_{10}(M_*/\rm {\rm M}_{\odot })$ =10.0, are probed by 184 ba…
MIRI MRS Observations of β Pictoris. I. The Inner Dust, the Planet, and the Gas
Law, David R.; Stark, Christopher C.; Chen, Christine H. +15 more
We present JWST MIRI Medium Resolution Spectrograph (MRS) observations of the β Pictoris system. We detect an infrared excess from the central unresolved point source from 5 to 7.5 µm which is indicative of dust within the inner ∼7 au of the system. We perform point-spread function (PSF) subtraction on the MRS data cubes and detect a spatial…
Glimmers in the Cosmic Dawn: A Census of the Youngest Supermassive Black Holes by Photometric Variability
Melinder, Jens; Ellis, Richard S.; Saxena, Aayush +10 more
We report the first results from a deep near-infrared campaign with the Hubble Space Telescope to obtain late-epoch images of the Hubble Ultra Deep Field, 10–15 yr after the first epoch data were obtained. The main objectives are to search for faint active galactic nuclei (AGN) at high redshifts by virtue of their photometric variability and measu…
ALMA-IMF. IX. Catalog and Physical Properties of 315 SiO Outflow Candidates in 15 Massive Protoclusters
Galván-Madrid, R.; Cunningham, N.; Csengeri, T. +24 more
We present a catalog of 315 protostellar outflow candidates detected in SiO J = 5 - 4 in the ALMA-IMF Large Program, observed with ~2000 au spatial resolution, 0.339 km s-1 velocity resolution, and 2-12 mJy beam-1 (0.18-0.8 K) sensitivity. We find median outflow masses, momenta, and kinetic energies of ~0.3 M ⊙, 4 …
21cm signal sensitivity to dark matter decay
Qin, Y.; Mesinger, A.; Facchinetti, G. +1 more
The redshifted 21cm signal from the Cosmic Dawn is expected to provide unprecedented insights into early Universe astrophysics and cosmology. Here we explore how dark matter can heat the intergalactic medium before the first galaxies, leaving a distinctive imprint in the 21cm power spectrum. We provide the first dedicated Fisher matrix forecasts o…