Results 31 to 40 of about 3,949,170 (113)

The High-energy Spectrum of the Young Planet Host V1298 Tau

The Astronomical Journal, 2023
V1298 Tau is a young pre-main-sequence star hosting four known exoplanets that are prime targets for transmission spectroscopy with current-generation instruments. This work pieces together observations from the NICER X-ray telescope, the Space Telescope
Girish M. Duvvuri, P. Wilson Cauley, Fernando Cruz Aguirre, Roy Kilgard, Kevin France, Zachory K. Berta-Thompson, J. Sebastian Pineda   +6 more
doaj   +1 more source

Variability of Saturn's Equatorial Zonal Winds at Cloud Level Between 2018 and 2025

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Saturn's zonal wind profile at cloud level has been measured at different epochs since the Voyager 1 and 2 in 1980–81. At most latitudes, zonal winds change little over time. However, the equatorial region, between planetographic latitudes 10°N and 10°S, presents a complex vertical structure and significant variability.
Aida Flix‐Bellmunt, Agustín Sánchez‐Lavega, Enrique García‐Melendo, Ricardo Hueso, Amy A. Simon, Mike H. Wong, Arnau Miró, Trevor Barry   +7 more
wiley   +1 more source

Far‐UV emissions from the SL9 impacts with Jupiter [PDF]

, 1995
Observations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale.
Liu, X, Rego, D, Fireman, G, Ajello, JM, Combi, M. R., Harris, W. M., Feldman, P. D., ben Jaffel, L., Liu, X., Strobel, DF, Jessup, K. L., Feldman, PD, Talavera, A., Livengood, T. A., Gladstone, GR, Budzien, SA, McGrath, MA, Clarke, J. T., ben Jaffel, L, Talavera, A, Prangé, R., Strobel, D. F., Ajello, J. M., Fireman, G., Vincent, M. B., Vincent, MB, Jessup, KL, Emerich, C., Miller, S., Hall, D. T., Combi, MR, Gladstone, G. R., McGrath, M. A., Woodney, L, Emerich, C, Rego, D., Budzien, S. A., Harris, WM, Miller, S, Clarke, JT, Ballester, GE, Livengood, TA, Ballester, G. E., Prangé, R, Woodney, L., Hall, DT   +45 more
core   +1 more source

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 survey of Magellanic Cloud star clusters

Astronomy & Astrophysics
Binary stars are key tracers of the dynamical evolution of star clusters and provide important constraints on stellar populations and mass functions. The Magellanic Clouds host clusters with a wide range of ages and masses, offering an ideal laboratory ...
Muratore F., Legnardi M. V., Milone A. P., Cordoni G., Mastrobuono-Battisti A., Marino A. F., Ziliotto T., Dondoglio E., Bortolan E., Lagioia E. P.   +9 more
doaj   +1 more source

Proper Motions of Jets on the Kiloparsec Scale: New Results with HST

Galaxies, 2017
The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the mid-1990s; with time baselines on the order of 20 years and state-of-the-art astrometry techniques, we ...
Eileen T. Meyer, William B. Sparks, Markos Georganopoulos, Roeland van der Marel, Jay Anderson, Sangmo T. Sohn, John Biretta, Colin Norman, Marco Chiaberge, Eric Perlman   +9 more
doaj   +1 more source

SKYSURF-4: Panchromatic Hubble Space Telescope All-Sky Surface-brightness Measurement Methods and Results

The Astronomical Journal, 2023
The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. The HST Archival Legacy program SKYSURF aims to measure the 0.2–1.6 μ m sky surface brightness (sky-SB) from over 140 ...
Rosalia O’Brien, Timothy Carleton, Rogier A. Windhorst, Rolf A. Jansen, Delondrae Carter, Scott Tompkins, Sarah Caddy, Seth H. Cohen, Haley Abate, Richard G. Arendt, Jessica Berkheimer, Annalisa Calamida, Stefano Casertano, Simon P. Driver, Connor Gelb, Zak Goisman, Norman Grogin, Daniel Henningsen, Isabela Huckabee, Scott J. Kenyon, Anton M. Koekemoer, Darby Kramer, John Mackenty, Aaron Robotham, Steven Sherman   +24 more
doaj   +1 more source

Materials and Music: Selective Imperfection as a Generative Framework for Analysis, Creativity and Discovery

Interdisciplinary Materials, Volume 5, Issue 5, Page 834-867, September 2026.
Vibrations in matter, from spider webs to molecules, water to flames, share a grammar with music. We propose that creativity emerges when constraints force expansion beyond existing possibilities. Selective imperfection restores balance, enabling invention.
Markus J. Buehler
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

A Solar Analog Model for Decrease in Far Ultraviolet Irradiance Under a Grand Minimum

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Solar analog field stars having a range of magnetic activity can provide an estimate of solar spectral irradiance (SSI) variability relevant to understanding the Sun's influence on terrestrial climate. This approach is particularly useful for far ultraviolet (FUV) irradiance that cannot be observed from the Earth surface.
D. Lubin, C. Melis, D. Tytler
wiley   +1 more source