Results 111 to 120 of about 176,075 (225)
Space Weather, Volume 23, Issue 2, February 2025.Abstract Enhanced radiation in the Earth's atmosphere can pose serious hazards to pilots, aircraft passengers, and commercial space travelers. Recent results have shown, statistically, that there is a strong correlation between dose rates observed by Automated Radiation Measurements for Aerospace Safety (ARMAS) instruments at aviation altitudes (>9 km)
Homayon Aryan +5 more
wiley +1 more source
The Astrophysical JournalGalactic bars can form via the internal bar instability or external tidal perturbations by other galaxies. We systematically compare the properties of the bars formed through the two mechanisms with a series of controlled N -body simulations that form ...
Yirui Zheng, Juntai Shen
doaj +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 2, Page 247-272, February 2025.Abstract Calcium‐aluminum‐rich inclusions (CAIs) are the first objects that formed in the solar accretion disk and therefore provide valuable insights into the evolution of the early solar system. A long‐standing question regarding this earliest formative period relates to the storage of CAIs in the 1–4 Myr time period between their formation and later
P. Ghaznavi +3 more
wiley +1 more source
The Plant Journal, Volume 121, Issue 3, February 2025.SUMMARY DICER‐LIKE (DCL) proteins play a central role in plant small RNA (sRNA) biogenesis. The genome of the early land plant Marchantia polymorpha encodes four DCL proteins: MpDCL1a, MpDCL1b, MpDCL3, and MpDCL4. While MpDCL1a, MpDCL3 and MpDCL4 show high similarities to their orthologs in Physcomitrium patens and Arabidopsis thaliana, MpDCL1b shares ...
Erika Csicsely +10 more
wiley +1 more source
Chemical enrichment in isolated barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 16 pages, 11 figures, accepted for publication in ...
Hugo Martel +4 more
openaire +2 more sources
Computer Folding of Parallel DNA G‐Quadruplex: Hitchhiker's Guide to the Conformational Space
Journal of Computational Chemistry, Volume 46, Issue 1, January 5, 2025.This study presents a novel computational protocol for folding guanine quadruplexes (GQs) from single‐strand conformation to their native state. Utilizing two enhanced sampling techniques, the protocol models multichannel folding pathways, elucidating diverse intermediates and mechanisms.
Michal Janeček +7 more
wiley +1 more source
Molecular Gas Kinematics in Barred Spiral Galaxies [PDF]
The Astrophysical Journal, 1999 To quantify the effect that bar driven mass inflow can have on the evolution of a galaxy requires an understanding of the dynamics of the inflowing gas. In this paper we study the kinematics of the dense molecular gas in a set of seven barred spiral galaxies to determine which dynamical effects dominate.
Kartik Sheth +2 more
openaire +4 more sources
Do Strong Bars Exhibit Strong Noncircular Motions?
The Astrophysical JournalGalactic bars induce characteristic motions deviating from pure circular rotation, known as noncircular motions. As bars are nonaxisymmetric structures, stronger bars are expected to show stronger noncircular motions.
Taehyun Kim +6 more
doaj +1 more source
Rings and spiral arms: are they coupled with bars? [PDF]
Proceedings of the International Astronomical Union (S355), 2020, 2019 Rings and spiral arms are distinctive features of many galaxies, and their properties are closely related to the disk dynamics. They are often associated to stellar bars, but the details of this connection are far from clear. We study the pitch angles of spiral arms and the frequency and dimensions of inner and outer rings as a function of disk ...
arxiv