Results 111 to 120 of about 32,395 (222)
Optical and Near-infrared Spectroscopy of the Outbursting Comet 12P/Pons-Brooks
The Astrophysical JournalWe present optical and near-infrared (NIR) observations of the outbursting, Halley-type comet 12P/Pons-Brooks (12P). Three NIR spectra were obtained during two outbursts in 2023 October and November, with the 3 m Infrared Telescope Facility and the ...
Ruining Zhao +6 more
doaj +1 more source
The activity characteristics and mechanisms of long-period comets
Earth and Planetary PhysicsComets are small celestial bodies orbiting around the Sun. They are remnants left over from the formation of the solar system; their interiors store original material of the planetary disk within the solar system. They are thus "fossils" for studying the
YingQi Wu +3 more
doaj +1 more source
The Coma Cluster as a Spherical Inhomogeneity in Relativistic Dust
The Astrophysical Journal, 1969 Dynamical model for spherical inhomogeneity in mean mass density of universe to predict velocity dispersion observed for Coma ...
openaire +1 more source
Brightness Behavior of Distant Oort Cloud Comets
The Planetary Science JournalDynamically new comets provide important insights into the conditions of the presolar nebula and its evolution, as they are believed to have experienced minimal solar heating before their discovery.
Carrie E. Holt +17 more
doaj +1 more source
IR-dust observations of Comet Tempel 2 with CRAF VIMS [PDF]
Measurement strategies are now being planned for using the Visual and Infrared Mapping Spectrometer (VIMS) to observe the asteroid Hestia, and the nucleus, and the gas and dust in the coma of comet P/Tempel 2 as part of the Comet Rendezvous Asteroid ...
Bell, J. F. +8 more
core +1 more source
Keck and Gemini Characterization of Hayabusa2# Rendezvous Target 1998 KY26
The Astronomical JournalNear-Earth object (NEO) 1998 KY _26 is a target of the Hayabusa2# spacecraft, which it will rendezvous with in 2031 July. The asteroid has been noted to rotate rapidly and has a large out-of-plane nongravitational acceleration.
Bryce T. Bolin +9 more
doaj +1 more source
On the origin of extinction in the Coma cluster of galaxies [PDF]
Visual extinction of distant clusters seen through the Coma cluster seem to suggest that dust may be present in the hot x ray emitting intracluster gas.
Dwek, Eli, Mather, John C., Rephaeli, Y.
core +1 more source
Simple Analytical Models of Grain Fragmentation in a Cometary Coma
The Astrophysical JournalMeasurements by the dual Langmuir Probe (LAP) on board Rosetta in the inner coma of comet 67P/Churyumov–Gerasimenko revealed an unexpected ∼50% level of attenuation of the impinging solar extreme-ultraviolet (EUV) radiation while the comet was near ...
E. Vigren +3 more
doaj +1 more source
Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks
The Astronomical JournalWe present optical observations of the Halley-type comet 12P/Pons–Brooks (12P) on its approach to perihelion. The comet was active even in the first observations at ∼8 au.
David Jewitt, Jane Luu
doaj +1 more source
Comet Gas and Dust Dynamics Modeling [PDF]
This software models the gas and dust dynamics of comet coma (the head region of a comet) in order to support the Microwave Instrument for Rosetta Orbiter (MIRO) project. MIRO will study the evolution of the comet 67P/Churyumov-Gerasimenko's coma system.
Lee, Seungwon, Von Allmen, Paul A.
core +1 more source