Zobrazeno 1 - 10
of 10
pro vyhledávání: '"D P Smits"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:5464-5474
A new tool to identify possible Zeeman pairs is presented here: the right circularly polarized (RCP) and left circularly polarized (LCP) components of a pair with velocity drift at the same rate. Long-term monitoring of hydroxyl transitions towards N
Autor:
P. L. Skelton, D. P. Smits
Publikováno v:
South African Journal of Science, Vol 105, Iss 3/4 (2010)
W Ursae Majoris (W UMa)-type variable stars are over-contact eclipsing binary stars. To understand how these systems form and evolve requires observations spanning many years, followed by detailed models of as many of them as possible. The All Sky Au
Externí odkaz:
https://doaj.org/article/b47db70202144b55b79af2cfe91697c3
Autor:
D. P. Smits, A. de Witt
Publikováno v:
Proceedings of the International Astronomical Union. 3:172-175
Jets from newly-formed stars plow into the surrounding ISM, creating nebulous regions known as Herbig-Haro (HH) objects. Signatures of C-type shocks have been found in many HH objects. Models of shock-excited 1720-MHz OH masers associated with SNRs s
Autor:
G. Taguchi, Makoto Uemura, E. Kitao, H. L. Worters, Mahito Sasada, Ryosuke Itoh, Koji S. Kawabata, T. Okushima, Hideyo Kawakita, Masayoshi Nagashima, Masayuki Yamanaka, M. Isogai, D. P. Smits, Yuji Ikeda, Takayuki Arasaki, Akira Arai
Publikováno v:
Proceedings of the International Astronomical Union. 7:121-123
Optical and near-infrared observations of novae give us useful information for understanding the diversity of nova eruptions. Classical nova V1723 Aql was discovered by F. Kabashima and K. Nishiyama on 2010 September 11. We have conducted photometric
Autor:
D. P. Smits
Publikováno v:
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie. 20:14-21
Waar ons nou die einde van die 2de millennium AD nader, het dit duidelik geword dat daar heelwat verwarring heers oor hoe en waarom ons kalender opgestel is soos dit is. Die lengte van ’n jaar en van die astronomiese eeu word beide gedefinieer aan
Autor:
D. P. Smits
Publikováno v:
South African Journal of Science and Technology, Vol 20, Iss 1, Pp 14-21 (2001)
Waar ons nou die einde van die 2de millennium AD nader, het dit duidelik geword dat daar heelwat verwarring heers oor hoe en waarom ons kalender opgestel is soos dit is. Die lengte van ’n jaar en van die astronomiese eeu word beide gedefinieer aan
Autor:
D. C. Hannikainen, R. W. Hunstead, D. Campbell‐Wilson, K. Wu, D. J. McKay, D. P. Smits, R. J. Sault
Publikováno v:
The Astrophysical Journal. 540:521-534
We report multifrequency radio observations of GRO J1655-40 obtained with the Australia Telescope Compact Array, the Molonglo Observatory Synthesis Telescope and the Hartebeesthoek Radio Astronomy Observatory at the time of the major hard X-ray and r
Autor:
C. R. Gwinn, M. J. Ojeda, M. C. Britton, J. E. Reynolds, D. L. Jauncey, E. A. King, P. M. McCulloch, J. E. J. Lovell, C. S. Flanagan, D. P. Smits, R. A. Preston, D. L. Jones
Publikováno v:
The Astrophysical Journal. 483:L53-L56
We use interstellar scattering of the Vela pulsar to determine the size of its emission region. From interferometric phase variations on short baselines, we find that radio-wave scattering broadens the source by 3.4+/-0.3 milliarcseconds along the ma
Autor:
T. R. Hunter, C. L. Brogan, G. C. MacLeod, C. J. Cyganowski, J. O. Chibueze, R. Friesen, T. Hirota, D. P. Smits, C. J. Chandler, R. Indebetouw
Publikováno v:
Astrophysical Journal; 2/20/2018, Vol. 854 Issue 2, p1-1, 1p
Autor:
D. P. Smits, P. R. Sutcliffe, C. K. Goertz, Anthony Walker, I. S. Dore, P. H. Stoker, W. J. Hughes, P. A. Wakerley, R. Haggard, J. A. Gledhill, M. W. J. Scourfield
Publikováno v:
Journal of Geophysical Research. 92:2461
A magnetospheric substorm that occurred at Sanae, Antarctica, on July 27, 1979, was observed by a variety of techniques. A synthesis of the observations is presented, and an attempt made to deduce details of the behavior of the magnetosphere-ionosphe