Results 51 to 60 of about 3,801 (208)

Steady Collapse of Uranus' Exosphere After 1998 to the Present Decade

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Uranus' thermospheric temperature decreased from ∼800K in 1986 to ∼450K in 2022 as determined from observations of H3+ and H2 infrared emissions. Spitzer 2007 lower atmosphere observations do not emulate this cooling trend. Here we show that the atomic H Lyman ⍺ emission from the disk of Uranus observed by HST from 2011 to 2022 are not ...
D. Bhattacharyya, J. T. Clarke, P. Stephenson, T. Koskinen, J.‐Y. Chaufray, L. Moore, H. Melin   +6 more
wiley   +1 more source

Cherenkov Telescope Array Observatory: Die Zukunft der Gammaastronomie

Physik in unserer Zeit, Volume 57, Issue 1, Page 10-18, January 2026.
Im Jahr 1989 hat das Wipple‐Observatorium die erste Quelle hochenergetischer Gammastrahlung entdeckt. 2002 waren dann sechs Quellen bekannt, 2024 schon mehr als 300. Und das ist immer noch lediglich die Spitze des Eisbergs in der jungen Geschichte der Gammaastronomie.
Daniela Hadasch, Daniel Mazin
wiley   +1 more source

Uncertainties in Ground‐Based Visual Double Star Measures

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT Stellar masses are found from the orbital elements of binary systems which are, in turn, computed from weighted astrometric measures. Astrometric measures of double stars (their position angle and separation) rarely include uncertainties, and published binary star orbits rarely include the weighting systems used in the determination of the ...
Roderick R. Letchford, Graeme L. White
wiley   +1 more source

A Post‐Launch Summary of the Science of NASA's Psyche Mission

AGU Advances, Volume 5, Issue 2, April 2024.
Abstract Astronomical observations indicate that asteroid (16) Psyche is a large, high‐density (likely >3,400 kg·m−3), metal‐rich (30–55 vol. %) asteroid. Psyche may be remnant core material or it could be a primordial, undifferentiated metal‐rich object.
Steven D. Dibb, Erik Asphaug, James F. Bell, Richard P. Binzel, William F. Bottke, Saverio Cambioni, John M. Christoph, Linda T. Elkins‐Tanton, Ralf Jaumann, David J. Lawrence, Rona Oran, Joseph G. O’Rourke, Carol Polansky, Benjamin P. Weiss, Mark Wieczorek, David. A. Williams   +15 more
wiley   +1 more source

How many Vesta‐like bodies existed in the asteroid belt?

Meteoritics &Planetary Science, Volume 59, Issue 4, Page 878-894, April 2024.
Abstract Asteroid 4 Vesta is typically thought to be the parent body of the HED (howardite, eucrite, and diogenite) meteorites due to spectral similarities. The discovery of asteroids far from Vesta with HED‐like spectra like (1459) Magnya and HED‐like meteorites (e.g., NWA 011) with anomalous oxygen isotopic values compared to typical HEDs is evidence
T. H. Burbine, R. C. Greenwood, B. Zhang, P. C. Buchanan   +3 more
wiley   +1 more source

SPITZER SPACE TELESCOPE MID-IR LIGHT CURVES OF NEPTUNE [PDF]

The Astronomical Journal, 2016
ABSTRACT We have used the Spitzer Space Telescope in 2016 February to obtain high cadence, high signal-to-noise, 17 hr duration light curves of Neptune at 3.6 and 4.5 μm. The light curve duration was chosen to correspond to the rotation period of Neptune.
John Stauffer, Mark S. Marley, John E. Gizis, Luisa Rebull, Sean J. Carey, Jessica Krick, James G. Ingalls, Patrick Lowrance, William Glaccum, J. Davy Kirkpatrick, Amy A. Simon, Michael H. Wong   +11 more
openaire   +3 more sources

Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization

The Astrophysical Journal, 2023
We present an analysis of multiwavelength observations of the dark globule DC 314.8–5.1, using data from the Gaia optical, Two Micron All Star Survey near-infrared, and Wide-field Infrared Survey Explorer mid-infrared surveys, dedicated imaging with the ...
E. Kosmaczewski, Ł Stawarz, C. C. Cheung, A. Bamba, A. Karska, W. R. M. Rocha   +5 more
doaj   +1 more source

Spitzer as a microlens parallax satellite : mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L [PDF]

, 2015
We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method.
Pietrukowicz, P., Gaudi, B. S., Calchi Novati, S., Choi, J.-Y., Mróz, P., BOZZA, Valerio, Skowron, J., Yee, J. C., Soszyński, I., Zhu (������), Wei, Carey, S., Zhu (祝伟), Wei, Gould, A., Ulaczyk, K., Udalski, A., Szyma��ski, M. K., Zhu, Wei, Szymański, M. K., Shin, I.-G., Novati, S. Calchi, Han, C., Pogge, R. W., Jeong, J., Shin, I. G., Jung, Y. K., Wyrzykowski, Ł., CALCHI NOVATI, Sebastiano, Hwang, K.-H., Beichman, C. A., Poleski, R., Kozłowski, S., DePoy, D. L., Mr��z, P., Pietrzy��ski, G., Choi, J. Y., Soszy��ski, I., Pietrzyński, G., Dominik, M., Wyrzykowski, ��., Bozza, V., Hwang, K. H., Koz��owski, S., Park, H.   +42 more
core   +1 more source

Heavy Elements and Electromagnetic Transients from Neutron Star Mergers

Annalen der Physik, Volume 536, Issue 2, February 2024.
Astro‐(physics) has made major leaps forward through the combined information provided by both gravitational waves and electromagnetic emission from the first detected neutron star merger event. This review provides an up‐to‐date overview of today's understanding of neutron star mergers and their electromagnetic emission and it discusses possible ...
Stephan Rosswog, Oleg Korobkin
wiley   +1 more source

Infrared Fluxes and Lightcurves of Near-Earth Objects: The Full Spitzer Sample

The Astronomical Journal
The IRAC camera on the Spitzer Space Telescope observed 2175 near-Earth objects (NEOs) during its Warm Mission phase, primarily in three large surveys, and also in a small number of a dedicated projects.
Joseph L. Hora, Alicia J. Allen, David E. Trilling, Howard A. Smith, Andrew McNeill   +4 more
doaj   +1 more source