Zobrazeno 1 - 10
of 546
pro vyhledávání: '"F P Keenan"'
Autor:
W. Bate, D. B. Jess, V. M. Nakariakov, S. D. T. Grant, S. Jafarzadeh, M. Stangalini, P. H. Keys, D. J. Christian, F. P. Keenan
Publikováno v:
Bate, W, Jess, D B, Nakariakov, V M, Grant, S D T, Jafarzadeh, S, Stangalini, M, Keys, P H, Christian, D J & Keenan, F P 2022, ' High-frequency Waves in chromospheric spicules ', The Astrophysical Journal, vol. 930, no. 2, 129 . https://doi.org/10.3847/1538-4357/ac5c53
Using high cadence observations from the Hydrogen-alpha Rapid Dynamics camera imaging system on the Dunn Solar Telescope, we present an investigation of the statistical properties of transverse oscillations in spicules captured above the solar limb.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d26f7bd2dc58103f75941d5992ac5a39
Publikováno v:
Annales Geophysicae, Vol 29, Pp 883-887 (2011)
Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere. Baroclinic motions of plasma in non-magnetic granules are the primary source of
Externí odkaz:
https://doaj.org/article/9429bb77140b4222a938a4a97817326a
Autor:
K. M. Aggarwal, F. P. Keenan
Publikováno v:
Canadian Journal of Physics. 92:1166-1177
We report calculations of energy levels, radiative decay rates, and lifetimes for transitions among the 3s$^2$3p$^5$, 3s3p$^6$, and 3s$^2$3p$^4$3d configurations of Cl-like W LVIII. The general-purpose relativistic atomic structure package (GRASP) ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8039552d617bb13f4119f8919405425
https://doi.org/10.1139/cjp-2013-0681
https://doi.org/10.1139/cjp-2013-0681
Autor:
F P Keenan, K M Aggarwal
Publikováno v:
Journal of Physics: Conference Series. 58:169-172
In this paper we report atomic data, namely energy levels, radiative rates, lifetimes, collision strengths, and excitation rate coefficients, for transitions among 89 levels of the (1s2) 2s2 2p6, 2s2 2p53l, 2s2p6 3l, 2s2 2p54l, and 2s2p64l configurat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77b60be3751d79db72afd0dd904bdbd8
https://doi.org/10.1088/1742-6596/58/1/033
https://doi.org/10.1088/1742-6596/58/1/033
Autor:
K. M. Aggarwal, F. P. Keenan
Publikováno v:
Astronomy & Astrophysics. 439:1215-1227
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d11e5ac8535173136e95bcb88dcfd99
https://doi.org/10.1051/0004-6361:20053057
https://doi.org/10.1051/0004-6361:20053057
Publikováno v:
Solar Physics. 228:323-338
8000 images of the Solar corona were captured during the June 2001 total Solar eclipse. New software for the alignment of the images and an automated technique for detecting intensity oscillations using multi scale wavelet analysis were developed. La
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0940ef10fb06bf8d86ee2ec5b4d0ddc
https://doi.org/10.1007/s11207-005-5781-0
https://doi.org/10.1007/s11207-005-5781-0
Publikováno v:
Physica Scripta. 71:356-361
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e40859e7b0f98b961c68762900c3868
https://doi.org/10.1238/physica.regular.071a00356
https://doi.org/10.1238/physica.regular.071a00356
Publikováno v:
Astronomy & Astrophysics. 410:349-358
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c378dada107a8d976dc8087bd034837e
https://doi.org/10.1051/0004-6361:20031193
https://doi.org/10.1051/0004-6361:20031193
Autor:
J. V. Smoker, N. Lehner, F. P. Keenan, E. J. Totten, E. Murphy, K. R. Sembach, R. D. Davies, B. Bates
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 322:13-21
We present echelle spectrograph observations in NaD, at resolutions of 6.2-8.5 km/s, for 11 stars located in the line-of-sight to the M15 intermediate velocity cloud, which has a radial velocity of 70 km/s. This cloud is a part of IVC Complex gp. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca5819a7e474e6c81748c857f85a473a
https://doi.org/10.1046/j.1365-8711.2001.03999.x
https://doi.org/10.1046/j.1365-8711.2001.03999.x
Autor:
A. Berlicki, F. P. Keenan, Peter T. Gallagher, K. J. H. Phillips, P. Rudawy, D. R. Williams, B. Rompolt
Publikováno v:
Symposium - International Astronomical Union. 203:467-470
We report on results from the Solar Eclipse Coronal Imaging System (SECIS), an instrument using fast CCD cameras designed to search for short-period modulations in visible-light emission from the corona during an eclipse or with a coronagraph. The in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afde0b35cf3a25b4841256a00c2ba5e7
https://doi.org/10.1017/s0074180900219797
https://doi.org/10.1017/s0074180900219797