Results 71 to 80 of about 4,597 (205)

DIRBE Minus 2MASS: Confirming the CIRB in 40 New Regions at 2.2 and 3.5 Microns

, 2007
With the release of the 2MASS All-Sky Point Source Catalog, stellar fluxes from 2MASS are used to remove the contribution due to Galactic stars from the intensity measured by DIRBE in 40 new regions in the North and South Galactic polar caps.
B. D. Johnson, E. L. Wright, L. R. Levenson, Matsumoto T., Wright E.   +4 more
core   +1 more source

Calibration of a hybrid sea ice model during an expedition to the Arctic

Proceedings in Applied Mathematics and Mechanics, Volume 24, Issue 3, October 2024.
Abstract We describe the acquisition and evaluation of data during the ArcWatch II expedition into the Arctic Ocean on board of the icebreaker Polarstern. The data is used to calibrate a hybrid sea ice model that focuses on modeling the marginal ice zone, which is the transition zone between pack ice and the open ocean.
Carolin Mehlmann, Thomas Richter
wiley   +1 more source

A Nulling Wide Field Imager for Exoplanets Detection and General Astrophysics

, 2002
We present a solution to obtain a high-resolution image of a wide field with the central source removed by destructive interference. The wide-field image is created by aperture synthesis with a rotating sparse array of telescopes in space. Nulling of the
Aime, Aime, Aime, Angel, Beichman, Boccaletti, Bracewell, de Bruijne, Dermott, F. Roddier, Guyon, Guyon, Hajian, Jenniskens, Kresak, Labeyrie, Leger, Liou, Lyot, Malbet, Mennesson, Nakamura, O. Guyon, Peacock, Pedretti, Rando, Reach, Riaud, Roddier, Roddier, Rouan, Sykes, Wyne   +32 more
core   +2 more sources

Oxygen isotopic compositions of fresh rooftop micrometeorites from the Budel collection—Insights into the contemporary cosmic dust flux

Meteoritics &Planetary Science, Volume 59, Issue 6, Page 1236-1257, June 2024.
Abstract Cosmic dust particles originate from a wide variety of solar system and interstellar objects, including sources not identified among meteorite collections. Particles that survive atmospheric entry are retrieved on the Earth's surface as micrometeorites. The recovery of these micrometeorites has recently advanced to rooftop sites.
Guido Jonker, Flore van Maldeghem, Matthias van Ginneken, Lisa Krämer Ruggiu, Steven Goderis   +4 more
wiley   +1 more source

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
doaj   +1 more source

Searching for Saturn's Dust Swarm: Limits on the size distribution of Irregular Satellites from km to micron sizes

, 2011
We describe a search for dust created in collisions between the Saturnian irregular satellites using archival \emph{Spitzer} MIPS observations. Although we detected a degree scale Saturn-centric excess that might be attributed to an irregular satellite ...
Benz, Benz, Bottke, Britt, Burns, Carruba, Davis, Dohnanyi, Durda, G. M. Kennedy, Gladman, Greenberg, Greenberg, Greenberg, Grogan, Housen, Housen, J. A. Stansberry, Jewitt, K. Y. L. Su, Kelsall, Kennedy, Kessler, Kirchoff, Li, Low, M. C. Wyatt, Nesvorný, Nesvorný, O’Brien, Richardson, Rieke, Sheppard, Smith, Stewart, Verbiscer, Wyatt, Ćuk   +37 more
core   +1 more source

A Novel Gravity Wave Transport Parametrization for Global Chemistry Climate Models: Description and Validation

Journal of Advances in Modeling Earth Systems, Volume 16, Issue 5, May 2024.
Abstract The gravity wave drag parametrization of the Whole Atmosphere Community Climate Model (WACCM) has been modified to include the wave‐driven atmospheric vertical mixing caused by propagating, non‐breaking, gravity waves. The strength of this atmospheric mixing is represented in the model via the “effective wave diffusivity” coefficient (Kwave ...
Maria‐Vittoria Guarino, Chester S. Gardner, Wuhu Feng, Bernd Funke, Maya García‐Comas, Manuel López‐Puertas, Marcin M. Kupilas, Daniel R. Marsh, John M. C. Plane   +8 more
wiley   +1 more source

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
doaj   +1 more source

The local dust foregrounds in the microwave sky: I. Thermal emission spectra

, 2009
Analyses of the cosmic microwave background (CMB) radiation maps made by the Wilkinson Microwave Anisotropy Probe (WMAP) have revealed anomalies not predicted by the standard inflationary cosmology.
Dikarev, V., Krivov, A., Krueger, H., Preuss, O., Solanki, S.   +4 more
core   +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
openaire   +1 more source