Results 71 to 80 of about 296,727 (213)

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

Spectroscopic Evidence of Organic Molecules Released By the Dust of Halley’s Inner Coma [PDF]

International Astronomical Union Colloquium, 1991
Abstract New spectroscopic arguments supporting the probable presence of organic molecules in the material released by comet Halley are deduced from the data obtained by the Vega three-channel spectrometer. Two excesses of emission on the UV side of the OH and CN bands at 305 and 383 nm are interpreted as being due to “prompt” radiation emitted by ...
J. Clairemidi, P. Rousselot, G. Moreels
openaire   +1 more source

Dust coma of Comet C/1999 S4 (LINEAR): imaging polarimetry during nucleus disruption

, 2003
International audienceImaging and polarimetry of Comet C/1999 S4 (LINEAR) during its disruption provide information about the physical properties of the scattering dust particles, and some insight into the structure of the nucleus. A significant decrease
Hadamcik, Edith, Levasseur-Regourd, Anny Chantal   +1 more
core   +1 more source

Environmental pollution and sustainable restoration of the Yamuna River: A review of water quality, health risks, and phycoremediation

River, Volume 5, Issue 3, Page 398-418, August 2026.
Abstract The Yamuna River, one of India's most significant river systems and the largest tributary of the Ganges River, serves critical ecological, socio‐economic, and cultural functions. However, rapid urbanization, industrialization, and intensive agriculture have severely degraded its water quality, resulting in extensive pollution with untreated ...
Dharmendra Kumar, Gaurav Kumar, Elangbam Geetanjali, Rashmi Shakya, Deepali Verma, Shivankar Agrawal, Dinabandhu Sahoo   +6 more
wiley   +1 more source

Optical and Near-infrared Contemporaneous Polarimetry of C/2023 A3 (Tsuchinshan-ATLAS)

The Astrophysical Journal Letters
We conducted contemporaneous optical and near-infrared polarimetric and spectroscopic observations of C/2023 A3 (Tsuchinshan-ATLAS, hereafter T-A) from 2024 October 16 to December 17, covering a wide range of phase angles (20°–123°) and wavelengths (0.5 ...
Bumhoo Lim, Masateru Ishiguro, Jun Takahashi, Hiroshi Akitakya, Jooyeon Geem, Yoonsoo P. Bach, Sunho Jin, Hangbin Jo, Seungwon Choi, Jinguk Seo, Koji S. Kawabata, Tomoya Hori, Tetsuharu Maruta, Myungshin Im   +13 more
doaj   +1 more source

Neutral Wind Control of Jupiter's Non‐Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract We use JAMMIES (JAMMIES is Another Model Making Ionospheric EStimates), a new model of Jupiter's non‐auroral ionosphere, to demonstrate that neutral wind‐driven field‐aligned plasma transport can explain decades of measurements inconsistent with a solar‐dominated ionosphere. Two observations highlight these inconsistencies: a minimum in H3+ ${\
K. Mohamed, O. Agiwal, L. Moore, I. Mueller‐Wodarg, J. D. Huba, C. Martinis, T. Stallard, H. Melin   +7 more
wiley   +1 more source

Infrared emission from dust in the Coma cluster of galaxies

The Astrophysical Journal, 1990
Detailed calculations of the infrared emission from collisionally heated dust in the Coma cluster are presented. The proposed model includes continuous dust injection from galaxies, grain destruction by sputtering, and transient grain heating by the hot plasma.
Eli Dwek, Yoel Rephaeli, John C. Mather
openaire   +1 more source

Dust Activity Evolution and Constraints on Icy Grains in the Interstellar Comet 3I/ATLAS

The Astrophysical Journal Letters
We present Zwicky Transient Facility observations of the interstellar comet 3I/ATLAS to characterize its dust-activity evolution before and after perihelion.
Bin Liu, Xiaoping Zhang, Xiaodong Liu, Man-To Hui   +3 more
doaj   +1 more source

From heart to mind: A narrative review of incidence, risk factors, and mechanisms of dementia after cardiac surgery

Alzheimer's &Dementia, Volume 22, Issue 9, September 2026.
Abstract As cardiac surgery becomes more common, concerns about postoperative cognitive decline and the potential progression to dementia have grown. While postoperative cognitive dysfunction (POCD) is well documented, its relationship to long‐term dementia risk remains unclear.
Tina Esfandiary, Isia Cadieux, Renee S. McIntyre, Louise Y. Sun   +3 more
wiley   +1 more source

Lucy Mission Search Plans for Activity around Its Jovian Trojan Flyby Targets

The Planetary Science Journal
Activity in small bodies, defined here as the episodic or continuous release of material, was long thought to be exclusively a behavior of comets, but it has since been discovered in some centaurs, main-belt asteroids, and near-Earth asteroids.
S. Alan Stern, Carly Howett, Neil Dello Russo, Harold A. Weaver, James F. Bell III, Dennis Reuter, Amy Simon, Hannah Kaplan, Keith Noll, John Spencer, Simone Marchi, Hal Levison   +11 more
doaj   +1 more source