Results 51 to 60 of about 84,390 (224)

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

Hubble Space Telescope Observations of the Draco Dwarf Spheroidal [PDF]

, 1997
We present an F606W-F814W color-magnitude diagram for the Draco dwarf spheroidal galaxy based on Hubble Space Telescope WFPC2 images. The luminosity function is well-sampled to 3 magnitudes below the turn-off. We see no evidence for multiple turnoffs and
Alan M. Watson, Carl J. Grillmair, Christopher J. Burrows, David Crisp, Gilda E. Ballester, Guy Worthey, J. Jeff Hester, James A. Westphal, Jeremy R. Mould, John G. Hoessel, John S. Gallagher III, John T. Clarke, John T. Trauger, Jon A. Holtzman, Karl R. Stapelfeldt, Kroupa P., Paul A. Scowen, Reimers D., Richard E. Griffiths, Robin W. Evans, Stetson P., Worthey G.   +21 more
core   +2 more sources

Accelerated Knowledge Discovery: A Vision for NASA Science

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract This paper introduces the sixth paradigm of scientific discovery: accelerated knowledge discovery (AKD). This paradigm is defined by the full integration of artificial intelligence (AI) into the research workflow as a tool augmenting cognitive capabilities of human scientists.
Rahul Ramachandran, Kaylin Bugbee, Juan Bernabe‐Moreno   +2 more
wiley   +1 more source

Massive Star Formation in the Ultraviolet Observed with the Hubble Space Telescope

Galaxies, 2020
Spectroscopic observations of a massive star formation in the ultraviolet and their interpretation are reviewed. After a brief historical retrospective, two well-studied resolved star clusters and the surrounding H II regions are introduced: NGC 2070 in ...
Claus Leitherer
doaj   +1 more source

Probing Ganymede’s Atmosphere with HST Lyα Images in Transit of Jupiter

The Planetary Science Journal, 2023
We report results from far-ultraviolet observations by the Hubble Space Telescope of Jupiter’s largest moon, Ganymede, transiting across the planet’s dayside hemisphere.
Lorenz Roth, Gregorio Marchesini, Tracy M. Becker, H. Jens Hoeijmakers, Philippa M. Molyneux, Kurt D. Retherford, Joachim Saur, Shane R. Carberry Mogan, Jamey R. Szalay   +8 more
doaj   +1 more source

Hubble Space Telescope observations of Baade's window [PDF]

Symposium - International Astronomical Union, 1993
This is a status report on a continuing program using the Hubble Space Telescope (HST) Wide–Field Camera (WFC) to probe the stellar population of the Galactic bulge to fainter magnitudes. We seek the mean age of the stars and the initial mass function (IMF).
W. A. Baum, R. M. Light, J. Holtzman, D. Hunter, T. Kreidl, E. J. O’Neil, E. J. Groth   +6 more
openaire   +1 more source

JWST/NIRSpec Reveals the Atmospheric Driver of Saturn's Variable Magnetospheric Rotation Rate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Past measurements of Saturn's upper atmosphere have allowed only a broad scale view of the temperature and ion density structures within the auroral region. However, Saturn's auroral currents include a planetary period current component that is produced by neutral atmospheric flows.
Tom S. Stallard, Luke Moore, Henrik Melin, Chris G. A. Smith, Omakshi Agiwal, M. Nahid Chowdhury, Rosie E. Johnson, Katie L. Knowles, Emma M. Thomas, Paola I. Tiranti, James O’Donoghue, Khalid Mohamed, Ingo Mueller‐Wodarg, John C. Coxon, Sarah V. Badman, Joe A. Caggiano   +15 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

Exploring the Interior Structure of (16) Psyche Through Basin‐Scale Collisions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Asteroid (16) Psyche, the largest member of the M/X‐type asteroids, may be the leftover core of a differentiated planetesimal. As such (16) Psyche will be explored in detail by NASA's discovery‐class Psyche mission in 2029. This will be the first mission to orbit a metal‐rich asteroid, or any asteroid in the 100–500 km size range.
Namya Baijal, Erik Asphaug, C. Adeene Denton, Martin Jutzi, Sabina Raducan, Saverio Cambioni, Linda T. Elkins‐Tanton, Amanda Alexander   +7 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