Results 31 to 40 of about 156 (136)

A Rotational Disruption Crisis for Zodiacal Dust

The Astrophysical Journal Letters
A systematic torque from anisotropic radiation can rapidly spin up irregular grains to the point of breakup. We apply the standard theory of rotational disruption from radiative torques to solar system grains, finding that grains with radii ∼0.03–3 μ m ...
Kedron Silsbee, Brandon S. Hensley, Jamey R. Szalay, Petr Pokorný, Jeong-Gyu Kim   +4 more
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Understanding the Dust Environment at Mercury: From Surface to Exosphere

The Planetary Science Journal
We provide an overview of our understanding of the dust environment at Mercury and the role that dust plays in shaping the planet's surface and exosphere.
Harald Krüger, Michelle S. Thompson, Masanori Kobayashi, Valeria Mangano, Martina Moroni, Anna Milillo, Lindsay P. Keller, Sho Sasaki, Joe Zender, Deborah Domingue, Johannes Benkhoff, André Galli, François LeBlanc, Go Murakami, Menelaos Sarantos, Daniel W. Savin   +15 more
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Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of α Centauri A. I. Observations, Orbital and Physical Properties, and Exozodi Upper Limits

The Astrophysical Journal Letters
We report on coronagraphic observations of the nearest solar-type star, α Centauri A ( α Cen A), using the MIRI instrument on the James Webb Space Telescope.
Charles Beichman, Aniket Sanghi, Dimitri Mawet, Pierre Kervella, Kevin Wagner, Billy Quarles, Jack J. Lissauer, Max Sommer, Mark Wyatt, Nicolas Godoy, William O. Balmer, Laurent Pueyo, Jorge Llop-Sayson, Jonathan Aguilar, Rachel Akeson, Ruslan Belikov, Anthony Boccaletti, Elodie Choquet, Edward Fomalont, Thomas Henning, Dean Hines, Renyu Hu, Pierre-Olivier Lagage, Jarron Leisenring, James Mang, Michael Ressler, Eugene Serabyn, Pascal Tremblin, Marie Ygouf, Mantas Zilinskas   +29 more
doaj   +1 more source

Remote Sensing of the Zodiacal Cloud along Secants to Earth’s Orbit [PDF]

International Astronomical Union Colloquium, 1985
AbstractPartial but significant localization along the line of sight (l.o.s.) of the contributions to the integrated zodiacal brightness can be achieved, without recourse to rash physical assumptions, if we focus on the two intersections between the l.o.s. and the terrestrial orbit. Then, there exists on the l.o.s.
René Dumont, Anny-Chantal Levasseur-Regourd   +1 more
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The contribution of cometary dust to the zodiacal cloud

Planetary and Space Science, 1995
Abstract Any theory of the origin of the particles that supply the zodiacal cloud must account for two key, well-established observations. These are: (1) the observed plane of symmetry of the cloud; and (2) the observed shape of the cloud, that is, the observed variation of the flux in a given waveband with ecliptic latitude for a given elongation ...
Department of Astronomy, P.O. Box 112055, University of Florida, Gaineville, FL 32611-2055, U.S.A. ( host institution ), Liou, J.C., Dermott, S.F., Xu, Y.L.   +3 more
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Microwave thermal emission from the zodiacal dust cloud predicted with contemporary meteoroid models [PDF]

Astronomy & Astrophysics, 2015
Submitted to A& ...
Dikarev, Valery, Schwarz, Dominik
openaire   +3 more sources

SKYSURF. VI. The Impact of Thermal Variations of HST on Background Light Estimates

The Astronomical Journal
The SKYSURF project constrained extragalactic background light and diffuse light (DL) with the vast archive of Hubble Space Telescope (HST) images.
Isabel A. McIntyre, Timothy Carleton, Rosalia O’Brien, Rogier A. Windhorst, Sarah Caddy, Seth H. Cohen, Rolf A. Jansen, John MacKenty, Scott J. Kenyon   +8 more
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3.3 Can Short Period Comets Maintain the Zodiacal Cloud? [PDF]

International Astronomical Union Colloquium, 1976
The combined effects of the Poynting-Robertson drag, collisions and sputtering are destroying the interplanetary dust cloud. The mass-losses estimated by different authors reveal great discrepancies. The estimations range from 1 t sec−1 (purely Poynting-Robertson loss) over some 10 t sec−1 given by Whipple (1967) to a value of 100 t sec−1 which is ...
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Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of α Centauri A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis

The Astrophysical Journal Letters
The James Webb Space Telescope (JWST) observed our closest solar twin, α Centauri A ( α Cen A), with the Mid-Infrared Instrument in the F1550C (15.5 μ m) coronagraphic imaging mode at three distinct epochs between 2024 August and 2025 April.
Aniket Sanghi, Charles Beichman, Dimitri Mawet, William O. Balmer, Nicolas Godoy, Laurent Pueyo, Anthony Boccaletti, Max Sommer, Alexis Bidot, Elodie Choquet, Pierre Kervella, Pierre-Olivier Lagage, Jarron Leisenring, Jorge Llop-Sayson, Michael Ressler, Kevin Wagner, Mark Wyatt   +16 more
doaj   +1 more source

The Symmetry Plane of the Zodiacal Cloud Near 1 AU [PDF]

Symposium - International Astronomical Union, 1980
Analysis of zodiacal light observations from Mt. Haleakala, Hawaii show that the symmetry plane of the zodiacal cloud near 1 A.U. is close to the invariable plane of the solar system. Since the symmetry plane of the inner zodiacal cloud is close to the orbital plane of Venus (Misconi and Weinberg, 1978; Leinert et al., 1979), we suggest that the ...
openaire   +1 more source