Results 21 to 30 of about 36,294 (263)
High-altitude Spider-type Prominence above the Magnetic Null Point
The Astrophysical Journal, 2023 Rather unique observations of a high-altitude spider-type prominence in 2023 February are presented. The prominence or corresponding filament on the disk was not visible all the time but could appear and disappear in the course of a particular day ...
Boris Filippov
doaj +1 more source
Dynamical Mass Estimates of Large-Scale Filaments in Redshift Surveys [PDF]
, 1996 We propose a new method to measure the mass of large-scale filaments in galaxy redshift surveys. The method is based on the fact that the mass per unit length of isothermal filaments depends only on their transverse velocity dispersion.
Abraham Loeb +13 more
core +3 more sources
Latitude migration of solar filaments [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 The Carte Synoptique catalogue of solar filaments from March 1919 to December 1989, corresponding to complete cycles 16 to 21 is utilized to show latitudinal migration of filaments at low latitudes (less than 50 deg), and the latitudinal drift of solar filaments in each hemisphere in each cycle of the time interval is compared with the corresponding ...
openaire +3 more sources
Bolocam Survey for 1.1 mm Dust Continuum Emission in the c2d Legacy Clouds. II. Ophiuchus [PDF]
, 2006 We present a large-scale millimeter continuum map of the Ophiuchus molecular cloud. Nearly 11 square degrees, including all of the area in the cloud with visual extinction more than 3 magnitudes, was mapped at 1.1 mm with Bolocam on the Caltech ...
Anneila Sargent +13 more
core +2 more sources
On the Fine Structure of Solar Filaments [PDF]
The Astrophysical Journal, 2006 High-resolution Hα images of solar filaments show a variety of dark fine-structure fibrils, most of them aligned with the magnetic field that is sheared with respect to the filament long axis. Here we demonstrate how such fibrils can be explained in terms of the magnetic field dips produced by realistic mass loading due to plasma condensation along the
Heinzel, P., Anzer, U.
openaire +2 more sources
, 2015 We improve our filament automated detection method which was proposed in our previous works. It is then applied to process the full disk H$\alpha$ data mainly obtained by Big Bear Solar Observatory (BBSO) from 1988 to 2013, spanning nearly 3 solar cycles.
Cao, W., Chen, P. F., Fang, C., Hao, Q.
core +1 more source
Redefining the boundaries of interplanetary coronal mass ejections from observations at the ecliptic plane [PDF]
, 2016 On 2015 January 6-7, an interplanetary coronal mass ejection (ICME) was observed at L1. This event, which can be associated with a weak and slow coronal mass ejection, allows us to discuss on the differences between the boundaries of the magnetic cloud ...
Cid, C. +3 more
core +3 more sources
CHIRALITY AND MAGNETIC CONFIGURATIONS OF SOLAR FILAMENTS [PDF]
The Astrophysical Journal, 2017 ABSTRACT It has been revealed that the magnetic topology in the solar atmosphere displays hemispheric preference, i.e., helicity is mainly negative/positive in the northern/southern hemispheres, respectively. However, the strength of the hemispheric rule and its cyclic variation are controversial.
Y. Ouyang (欧阳雨) +3 more
openaire +2 more sources
Sympathetic Partial Filament Eruptions Caused by the Interaction between Two Nearby Filaments
The Astrophysical Journal, 2023 To better understand the physical connections in sympathetic solar eruptions, we investigated the interaction between two nearby filaments and their successive partial eruptions in the active region (AR) NOAA 12866 on 2021 September 9 by using data from ...
Liping Yang +9 more
doaj +1 more source
, 2009 The correlation between Ca and Halpha chromospheric emission, known to be positive in the solar case, has been found to vary between -1 and 1 for other stars.
Aboudarham +19 more
core +3 more sources