Results 31 to 40 of about 84,390 (224)

The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XIII. ACS/WFC Parallel-Field Catalogues [PDF]

, 2018
As part of the Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters, 110 parallel fields were observed with the Wide Field Channel of the Advanced Camera for Surveys, in the outskirts of 48 globular clusters, plus the open cluster NGC ...
Anderson, J., Aparicio, A., Bedin, L. R., Bellini, A., Brown, T. M., Cassisi, S., Cunial, A., Granata, V., Milone, A. P., Nardiello, D., Ortolani, S., Piotto, G., Simioni, M., van der Marel, R. P., Vesperini, E.   +14 more
core   +2 more sources

The Complete Sample of Available SNe Ia Luminosity Calibrations from the TRGB Observed with either HST or JWST

The Astrophysical Journal
Distance ladders, which calibrate the luminosity of Type Ia supernovae (SNe Ia), currently provide the strongest constraints on the local value of H _0 . Recent studies from the Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) show good
Siyang Li, Adam G. Riess, Gagandeep S. Anand, Dan Scolnic, Yukei S. Murakami, Dillon Brout, Erik R. Peterson   +6 more
doaj   +1 more source

Hubble Space Telescope Astrometry of the Procyon System

, 2015
The nearby star Procyon is a visual binary containing the F5 IV-V subgiant Procyon A, orbited in a 40.84 yr period by the faint DQZ white dwarf Procyon B. Using images obtained over two decades with the Hubble Space Telescope, and historical measurements
Barstow, Martin A., Bond, Howard E., Burleigh, Matthew R., Demarque, Pierre, Gilliland, Ronald L., Girard, Terrence M., Gudehus, Donald, Holberg, Jay B., Kozhurina-Platais, Vera, Mason, Brian D., Nelan, Edmund P., Schaefer, Gail H.   +11 more
core   +1 more source

M Dwarfs from Hubble Space Telescope Star Counts. IV [PDF]

, 2001
We study a sample of about 1400 disk M dwarfs that are found in 148 fields observed with the Wide Field Camera 2 (WFC2) on the Hubble Space Telescope and 162 fields observed with pre-repair Planetary Camera 1 (PC1), of which 95 of the WFC2 fields are ...
Andrew Gould, Baraffe I., Burstein D., Chris Flynn, Hawkins M. R. S., John N. Bahcall, Samir Salim, Zheng Zheng   +7 more
core   +2 more sources

Radio Pulse Power Distribution of Lightning in Jupiter's 2021–2022 Stealth Superstorms

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract Surveys and observations of lightning on Jupiter prior to the NASA Juno mission used night‐side imaging approaches, and a common conclusion was that the optical energy was similar to the highest energy terrestrial lightning flashes, or superbolts.
Michael H. Wong, Ivana Kolmašová, Fabiano A. Oyafuso, Masafumi Imai, Shinji Mizumoto, Steven M. Levin, Ramanakumar G. Sankar, Amy A. Simon, Shawn Brueshaber, Glenn S. Orton, Sushil K. Atreya, Cheng Li, Scott J. Bolton   +12 more
wiley   +1 more source

The First RELHIC? Cloud-9 is a Starless Gas Cloud

The Astrophysical Journal Letters
Five-hundred-meter Aperture Spherical Telescope observations have recently identified a compact H i cloud (hereafter Cloud-9) in the vicinity of the spiral galaxy M94.
Gagandeep S. Anand, Alejandro Benítez-Llambay, Rachael Beaton, Andrew J. Fox, Julio F. Navarro, Elena D’Onghia   +5 more
doaj   +1 more source

Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST

The Astrophysical Journal Letters, 2023
High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant.
Adam G. Riess, Gagandeep S. Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas M. Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard I. Anderson   +9 more
doaj   +1 more source

Motional Induction in Ganymede's Ocean

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract We investigate the magnetic signature of oceanic circulation in Ganymede's subsurface ocean using kinematic induction modeling. Our approach couples zonal jet flows from rotating thermal convection simulations with magnetic field models incorporating Ganymede's internal dynamo and external contributions from Jupiter.
Simon Cabanes, Thomas Gastine, Alexandre Fournier   +2 more
wiley   +1 more source

Auroral Emissions on Ganymede: New Constraints on Their Electron Energy Dependence

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Auroral emissions on Ganymede provide critical insights into its magnetospheric dynamics and atmospheric composition. Using a physics‐based atmospheric model with recent atmospheric observations and laboratory measurements of electron‐impact cross‐sections, this study revisits and significantly refines the relationship between auroral emission
Xin Cao, Mika K. G. Holmberg, Caitriona M. Jackman, Hans L. F. Huybrighs, Sebastian Cervantes, Audrey Vorburger   +5 more
wiley   +1 more source

The cosmological ultra-low frequency radio background: a solution to the Hubble tension and the 21-cm excess trough

European Physical Journal C: Particles and Fields, 2023
Recent observations of the Cosmic Microwave Background and the Hubble Space Telescope obtain two different values of the Hubble constant with a discrepancy of at least $$4.4 \sigma $$ 4.4 σ , which is now known as the Hubble tension.
Man Ho Chan
doaj   +1 more source