Results 41 to 50 of about 1,126,648 (199)

How Reconnection-unfavored Magnetic Flux Emergence Suppresses Solar Filament Eruptions

The Astrophysical Journal Letters
Magnetic flux emergence is traditionally considered to be a key trigger of solar filament eruptions, yet its role in suppressing filament eruptions remains less understood.
Chengrui Zhou, Yuandeng Shen, Chun Xia, Hao Liang, Zehao Tang, Dongxu Liu, Surui Yao   +6 more
doaj   +1 more source

Cosmic Ray Anisotropy Generated by the June 22nd 2015 Interplanetary Events

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract On 22 June 2015, the near Earth interplanetary space was perturbed by a series of high‐speed streamers and interplanetary coronal mass ejections associated with an active region and two low‐latitude coronal holes. The interaction of these disturbances gave rise to the complex solar wind structure observed at 1 au.
A. Lara, K. P. Arunbabu, T. Niembro
wiley   +1 more source

A filament eruption and coronal mass ejection from a superflare on a young Sun-like star

, 2023
We report that our optical spectroscopic observation of the young solar-type star EK Draconis reveals the first evidence for a stellar filament eruption associated with a superflare on a young Sun-like star EK Draconis. We monitored EK Draconis for about
Shibata, Kazunari, Nogami, Daisaku, Namekata, Kosuke, Honda, Satoshi, Notsu, Yuta, Maehara, Hiroyuki   +5 more
core   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

Beyond the Martin Curve: A Mechanistic Yet Simple Model for Dynamic Ocean Particulate Organic Carbon Fluxes

Global Biogeochemical Cycles, Volume 40, Issue 8, August 2026.
Abstract Biological processes contribute to ocean carbon storage, playing a critical role in the global carbon cycle by maintaining lower atmospheric CO2 ${\text{CO}}_{2}$ levels. A major pathway is the gravitational sinking of particulate organic carbon (POC), yet how POC fluxes change in a warming ocean remains uncertain due, in part, to high ...
Hengdi Liang, Emily J. Zakem, Jonathan M. Lauderdale, Raffaele Ferrari   +3 more
wiley   +1 more source

Sun-as-a-star Analyses of Various Solar Active Events Using H$\alpha$ Spectral Images Taken by SMART/SDDI [PDF]

, 2022
Sun-as-a-star analyses in which observational data is spatially integrated are useful for interpreting stellar data. For future applications to stellar observations, we performed Sun-as-a-star analyses of Hα spectra for various active events on the Sun ...
一本, 潔, 行方, 宏介, 大津, 天斗, Ichimoto, Kiyoshi, Asai, Ayumi, Namekata, Kosuke, Otsu, Takato, 石井, 貴子, 浅井, 歩, Ishii, Takako T, Ishii, Takako T.   +10 more
core   +1 more source

Mars Alteration on Earth: A Spectroscopic Study of Hydrated Silica and Biomarker Preservation in La Palma Lava Tubes

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Volcanic tubes provide stable environments where unique mineralogical assemblages can form and be preserved, making them valuable terrestrial analogs for Martian studies. This work investigates tree‐like structures within two lava tubes on La Palma Island (Canary Islands, Spain) through a comprehensive geochemical and mineralogical ...
F. Alberquilla, J. Aramendia, I. Martínez‐Arkarazo, G. Gorla, L. Coloma, G. Arana, A. Gonzalez, R. Gisbert, P. Cobiella, M. Perestelo, J. M. Madariaga   +10 more
wiley   +1 more source

Predicting Geomagnetic Activity in the Ascending and Declining Phases of the Solar Cycle

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Most predictions of space climate, that is, the long‐term behavior of the solar‐terrestrial environment, have focused on forecasting the 11‐year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks.
Timo Qvick, Timo Asikainen, Kalevi Mursula   +2 more
wiley   +1 more source

Data-constrained Magnetohydrodynamic Simulation of an Intermediate Solar Filament Eruption

The Astrophysical Journal, 2023
Abstract Solar eruptive activities could occur in weak magnetic field environments and over large spatial scales, which are especially relevant to eruptions involving intermediate or quiescent solar filaments. To handle the large scales, we implement and apply a flux rope embedding method using regularized Biot–Savart laws in the ...
Guo, Yang, Guo, Jinhan, Ni, Yiwei, Ding, M.D., Chen, P.F., Xia, Chun, Keppens, Rony, Yang, Kai E.   +7 more
openaire   +4 more sources

Flux Cancellation Leading to CME Filament Eruptions [PDF]

, 2016
Solar filaments are strands of relatively cool, dense plasma magnetically suspended in the lower density hotter solar corona. They trace magnetic polarity inversion lines (PILs) in the photosphere below, and are supported against gravity at heights of up
Panesar, Navdeep K., Sterling, Alphonse C., Popescu, Roxana M., Moore, Ronald L.   +3 more
core