Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Norman R. Simon"'
Autor:
Todd S. Young, Norman R. Simon
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 288:267-272
This study examines the possibility of galaxy-to-galaxy differences in the long-period Cepheid distributions of external galaxies. A simple theoretical framework is created and linear pulsation calculations are performed to model these distribu tio
Autor:
Norman R. Simon, Christine M. Clement
Publikováno v:
International Astronomical Union Colloquium. 139:315-323
A large number of hydrodynamic pulsation models are converged in the first overtone, and their mean properties compared with observations of RRc stars in six globular clusters. The two observed quantities, period and Fourier parameter ϕ31, lead, via
Autor:
Norman R. Simon
Publikováno v:
Stellar Pulsation ISBN: 9783540176688
We assess the current state of several areas in Cepheid research. The problem of mass determination is discussed and a number of methods evaluated. wE examine a recent interpretation of Cepheid masses which adopts a “short” distance scale and rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b721ab1be7c8127140995182bdef37f
https://doi.org/10.1007/3-540-17668-3_193
https://doi.org/10.1007/3-540-17668-3_193
Autor:
Norman R. Simon, Edward G. Schmidt
Publikováno v:
Stellar Pulsation ISBN: 9783540176688
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::163aa317cb782ca9fb20a09b0fb285ad
https://doi.org/10.1007/3-540-17668-3_200
https://doi.org/10.1007/3-540-17668-3_200
Publikováno v:
Clinical Neurophysiology, 113(12), 1937-1947. Elsevier
Objective : First, to determine the distribution of the estimated sources of sleep spindles, and alpha and mu rhythms based on whole-head magnetoencephalogram (MEG) recordings; second, to scrutinize the physiological relevance of the dipole fit algor
Publikováno v:
Brain Research, 860, 64-76. Elsevier
A 64-channel, whole cortex magnetoencephalographic system was employed to obtain sleep data from three healthy subjects. Based upon visual inspection of the signals and the corresponding power spectra, we were able to discern a number of features cha
Autor:
Norman R. Simon
Publikováno v:
Highlights of Astronomy. 10:593-594
With the advent of new radiative opacities, the gross discrepancies in period ratio between observed stars and theoretical models have been eliminated in both the “beat” and “bump” Cepheid regimes (Moskalik, et al. 1992; Kanbur & Simon 1994).
Autor:
Shashi M. Kanbur, Norman R. Simon
Publikováno v:
The Astrophysical Journal. 451:703
We compile a list of 50 long-period Cepheids (12d 20d, the plots versus period of the Fourier quantities 4>21> 4>31' 4>41' and R21 all show a slow rise, with considerable scatter. Hydrodynamic calculations are performed to model the observed stars. T
Autor:
Shashi M. Kanbur, Norman R. Simon
Publikováno v:
The Astrophysical Journal. 420:880
Comparative linear nonadiabatic pulsation calculations are presented using the OPAL and Opacity Project opacities. The two sets of opacities include effects due to intermediate coupling and fine structure as well as new abundances. We used two mass l
Autor:
Christine M. Clement, Norman R. Simon
Publikováno v:
The Astrophysical Journal. 419:L21
Recently, the Cepheids in the spiral galaxy IC 4182 have been in the spotlight due to their use as calibrators for the supernova Ia distance scale. In this process the distance to IC 4182 is obtained by applying the local Population I period-luminosi