Results 51 to 60 of about 3,949,170 (113)

Contrasting neutron star heating mechanisms with Hubble Space Telescope observations

Astronomy & Astrophysics
Passively cooling neutron stars (NSs) are expected to reach undetectably low surface temperatures, Ts 
Rodríguez Luis E., Reisenegger Andreas, González-Caniulef Denis, Petrovich Cristóbal, Pavlov George, Guillot Sébastien, Kargaltsev Oleg, Rangelov Blagoy   +7 more
doaj   +1 more source

Harnessing the Hubble Space Telescope Archives: A Catalog of 21,926 Interacting Galaxies

The Astrophysical Journal, 2023
Mergers play a complex role in galaxy formation and evolution. Continuing to improve our understanding of these systems requires ever larger samples, which can be difficult (even impossible) to select from individual surveys.
David O’Ryan, Bruno Merín, Brooke D. Simmons, Antónia Vojteková, Anna Anku, Mike Walmsley, Izzy L. Garland, Tobias Géron, William Keel, Sandor Kruk, Chris J. Lintott, Kameswara Bharadwaj Mantha, Karen L. Masters, Jan Reerink, Rebecca J. Smethurst, Matthew R. Thorne   +15 more
doaj   +1 more source

The Complete Life Cycle of Dark Spot NDS‐2018 on Neptune

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The Hubble Space Telescope collected imaging data spanning the full lifetime of Neptune's dark spot NDS‐2018, which is the sixth large, persistent dark spot seen in the planet's atmosphere. Neptune's dark spots are thought to be anticyclonic vortices, although internal flows have never been directly measured to confirm their rotation. Previous
Michael H. Wong, Raúl Morales‐Juberías, Lawrence Sromovsky, Patrick Fry, Amy A. Simon, Patrick G. J. Irwin, Agustín Sánchez‐Lavega, Ricardo Hueso, Imke de Pater   +8 more
wiley   +1 more source

Faint White Dwarf Flux Standards: Data and Models

The Astronomical Journal
Fainter standard stars are essential for the calibration of larger telescopes. This work adds to the calibration spectra (CALSPEC) database of 19 faint white dwarfs (WDs) with all-sky coverage and V magnitudes between 16.5 and 18.7.
Ralph C. Bohlin, Susana Deustua, Gautham Narayan, Abhijit Saha, Annalisa Calamida, Karl D. Gordon, Jay B. Holberg, Ivan Hubeny, Thomas Matheson, Armin Rest   +9 more
doaj   +1 more source

LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”)

The Astrophysical Journal, 2023
Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to develop the critical tools and methodologies needed as the sample of lensed SNe increases by orders ...
J. D. R. Pierel, N. Arendse, S. Ertl, X. Huang, L. A. Moustakas, S. Schuldt, A. J. Shajib, Y. Shu, S. Birrer, M. Bronikowski, J. Hjorth, S. H. Suyu, S. Agarwal, A. Agnello, A. S. Bolton, S. Chakrabarti, C. Cold, F. Courbin, J. M. Della Costa, S. Dhawan, M. Engesser, Ori D. Fox, C. Gall, S. Gomez, A. Goobar, S. W. Jha, C. Jimenez, J. Johansson, C. Larison, G. Li, R. Marques-Chaves, S. Mao, P. A. Mazzali, I. Perez-Fournon, T. Petrushevska, F. Poidevin, A. Rest, W. Sheu, R. Shirley, E. Silver, C. Storfer, L. G. Strolger, T. Treu, R. Wojtak, Y. Zenati   +44 more
doaj   +1 more source

Interactions of Sublimated Frost With Volcanic Plumes: Modeling Io's SO2 Atmosphere Using the DSMC Method

Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.
Abstract Io's tenuous atmosphere consists primarily of sulfur dioxide (SO2 ${\text{SO}}_{2}$) with observed column densities of approximately 1016−1017 $1{0}^{16}-1{0}^{17}$ cm−2 ${\text{cm}}^{-2}$. However, it remains uncertain whether the sublimation of SO2 ${\text{SO}}_{2}$ surface frost or volcanic outgassing is the primary source of the SO2 ...
Leander Schlarmann, Audrey Vorburger, Tim Mosimann, Nicolas Thomas, Peter Wurz   +4 more
wiley   +1 more source

A New Approach to Compiling Exoatmospheric Target Lists and Quantifying the Ground-based Resources Needed to Vet Them

The Astronomical Journal
Transiting exoplanet atmospheric characterization is currently in a golden age as dozens of exoplanet atmospheres are being studied by NASA’s Hubble and James Webb Space Telescopes.
Jennifer A. Burt, Robert T. Zellem, David R. Ciardi, Shubham Kanodia, Geoffrey Bryden, Tiffany Kataria, Kyle A. Pearson, Jessie L. Christiansen, Charles Beichman, B. J. Fulton, Mark Swain   +10 more
doaj   +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

Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross, D. J. Adams, M. L. Wong, K. J. Smith, Y. L. Yung   +4 more
wiley   +1 more source

Echoes in the Noise: Posterior Samples of Faint Galaxy Surface Brightness Profiles with Score-based Likelihoods and Priors

The Astronomical Journal
Examining the detailed structure of galaxy populations provides valuable insights into their formation and evolution mechanisms. Significant barriers to such analysis are the nontrivial noise properties of real astronomical images and the point-spread ...
Alexandre Adam, Connor Stone, Connor Bottrell, Ronan Legin, Yashar Hezaveh, Laurence Perreaul-Levasseur   +5 more
doaj   +1 more source