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A Light in the Dark: Searching for Electromagnetic Counterparts to Black Hole-Black Hole Mergers in LIGO/Virgo O3 with the Zwicky Transient Facility
Djorgovski, S. G.; Rusholme, Ben; Stern, Daniel +11 more
The accretion disks of active galactic nuclei (AGNs) are promising locations for the merger of compact objects detected by gravitational wave (GW) observatories. Embedded within a baryon-rich, high-density environment, mergers within AGNs are the only GW channel where an electromagnetic (EM) counterpart must occur (whether detectable or not). Cons…
The PHANGS-MUSE nebular catalogue
Dale, D. A.; Schinnerer, E.; Groves, B. +17 more
Ionized nebulae provide critical insights into the conditions of the interstellar medium (ISM). Their bright emission lines enable the measurement of physical properties, such as the gas-phase metallicity, across galaxy discs and in distant galaxies. The PHANGS-MUSE survey has produced optical spectroscopic coverage of the central star-forming dis…
Deep Synoptic Array Science: Discovery of the Host Galaxy of FRB 20220912A
Hallinan, Gregg; Fremling, Christoffer; Hodges, Mark +25 more
We report the detection and interferometric localization of the repeating fast radio burst (FRB) source FRB 20220912A during commissioning observations with the Deep Synoptic Array (DSA-110). Two bursts were detected from FRB 20220912A, one each on 2022 October 18 and 2022 October 25. The best-fit position is (R.A. J2000, decl. J2000) = (23:09:04.…
Gaia Data Release 3. The first Gaia catalogue of eclipsing-binary candidates
Mazeh, T.; Audard, M.; Rimoldini, L. +11 more
Context. Gaia Data Release 3 (DR3) provides a number of new data products that complement the early DR3 made available two years ago. Among these is the first Gaia catalogue of eclipsing-binary candidates containing 2 184 477 sources with brightnesses from a few magnitudes to 20 mag in the Gaia G-band and covering the full sky.
Aims: We prese…
Early Results from GLASS-JWST. X. Rest-frame UV-optical Properties of Galaxies at 7 < z < 9
Vulcani, B.; Treu, T.; Castellano, M. +23 more
We present the first James Webb Space Telescope/NIRCam-led determination of 7 < z < 9 galaxy properties based on broadband imaging from 0.8 to 5 µm as part of the GLASS-JWST Early Release Science program. This is the deepest data set acquired at these wavelengths to date, with an angular resolution ≲0.″14. We robustly identify 13 galax…
Gaia Data Release 3. Apsis. III. Non-stellar content and source classification
Hatzidimitriou, D.; Marshall, D. J.; Recio-Blanco, A. +78 more
Context. As part of the third Gaia Data Release, we present the contributions of the non-stellar and classification modules from the eighth coordination unit (CU8) of the Data Processing and Analysis Consortium, which is responsible for the determination of source astrophysical parameters using Gaia data. This is the third in a series of three pap…
The ionizing photon production efficiency at z 6 for Lyman-alpha emitters using JEMS and MUSE
Maiolino, R.; Sun, F.; Egami, E. +21 more
We study the ionizing photon production efficiency at the end of the Epoch of Reionization (z ~ 5.4 - 6.6) for a sample of 30 Ly α emitters. This is a crucial quantity to infer the ionizing photon budget of the universe. These objects were selected to have reliable spectroscopic redshifts, assigned based on the profile of their Ly α emission line,…
A long-period radio transient active for three decades
de Martino, D.; Heywood, I.; Rea, N. +22 more
Several long-period radio transients have recently been discovered, with strongly polarized coherent radio pulses appearing on timescales between tens to thousands of seconds1,2. In some cases, the radio pulses have been interpreted as coming from rotating neutron stars with extremely strong magnetic fields, known as magnetars; the orig…
Detection of phosphates originating from Enceladus's ocean
Postberg, Frank; Sekine, Yasuhito; Glein, Christopher R. +13 more
Saturn's moon Enceladus harbours a global1 ice-covered water ocean2,3. The Cassini spacecraft investigated the composition of the ocean by analysis of material ejected into space by the moon's cryovolcanic plume4-9. The analysis of salt-rich ice grains by Cassini's Cosmic Dust Analyzer10 enabled inferenc…
CATS: The Hubble Constant from Standardized TRGB and Type Ia Supernova Measurements
Li, S.; Dhawan, S.; Anderson, R. I. +7 more
The tip of the red giant branch (TRGB) provides a luminous standard candle for constructing distance ladders to measure the Hubble constant. In practice, its measurements via edge-detection response (EDR) are complicated by the apparent fuzziness of the tip and the multipeak landscape of the EDR. Previously, we optimized an unsupervised algorithm,…