Zobrazeno 1 - 10
of 13
pro vyhledávání: '"D. K. Walter"'
Publikováno v:
Physical Review A. 58:3642-3653
We present a detailed theoretical analysis of the noble-gas nuclear-spin relaxation due to the anisotropic magnetic-dipole hyperfine interaction between the noble-gas nucleus and alkali-metal valence electron vis \`a vis the already well-understood (
Autor:
J. Jeff Hester, K. P. M. Blagrave, Robert H. Rubin, Peter G. Martin, D. K. Walter, Reginald J. Dufour, Jack A. Baldwin
We are engaged in a comprehensive program to find reliable elemental abundances in and to probe the physical structure of the Orion Nebula, the brightest and best-resolved H II region. In the course of developing a robust extinction correction coveri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c458ae4fa5f983ea6d2aba1c16cd72a9
Autor:
Gary J. Ferland, C. R. O'Dell, J. Jeff Hester, Alexander G. G. M. Tielens, Reginald J. Dufour, S. Heathcote, Kirk T. Korista, D. K. Walter, Robert H. Rubin, Jack A. Baldwin, Peter G. Martin, Arlin P. S. Crotts, Z. Wen, E. M. Verner, Dima Verner
We reexamine the spectroscopic underpinnings of recent suggestions that [O I] and [Fe II] lines from the Orion H II region are produced in gas where the iron-carrying grains have been destroyed and the electron density is surprisingly high. Our new o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3a35460d81e7c646431bcd7d6d25f40
http://arxiv.org/abs/astro-ph/9607045
http://arxiv.org/abs/astro-ph/9607045
Publikováno v:
Engineering Applications of Computational Fluid Mechanics, Vol 12, Iss 1, Pp 57-73 (2018)
Numerical simulations of pulsatile flow in a feline aorta for hypertrophic cardiomyopathy (HCM) heart conditions are performed to predict flow details and to evaluate possible thrombus trajectory patterns. The study demonstrates that average flow rat
Externí odkaz:
https://doaj.org/article/a48b7aa99812409db852acaafaa4e2a9
Publikováno v:
Publications of the Astronomical Society of the Pacific. 107:686
A well-resolved elliptical shell in the inner Orion Nebula has been investigated by monochromatic imaging plus high- and low-resolution spectroscopy. We find that it is of low ionization and the two bright ends are moving at -39 and -49 km/s with res
Autor:
M.T. Carini, D. R. Davis, M. E. Everett, E. F. Guinan, S. B. Howell, S. V. Marchenko, J. R. Mattox, C. H. McGruder, D. K. Walter
Publikováno v:
Astronomische Nachrichten; Oct2004, Vol. 325 Issue 6-8, p559-564, 6p
Publikováno v:
The Astrophysical Journal. 413:242
We assess the gas-phase abundances of Si and C from our recent measurements of Si(2+), C(2+), and C(+) in the Orion Nebula by expanding on our earlier 'blister' models. The C and Si abundances are derived from new IUE high-dispersion spectra of the C
Autor:
D. K. Walter
Publikováno v:
Publications of the Astronomical Society of the Pacific. 103:830
The carbon abundance in the Orion nebula is redetermined from a detailed study of UV spectra in the IUE archives. Temperature and electron density gradients were derived for the inner 5 arcmin of the nebula using new and existing observational data.
Publikováno v:
Publications of the Astronomical Society of the Pacific. 90:679
Orbital elements for the 6th-magnitude 21.7-day double-lined binary HD 214686 are determined from coude spectrograms. Photometric observations show the system to contain two F7 V stars, and minimum masses near 1.16 solar masses are found for both com
Publikováno v:
Publications of the Astronomical Society of the Pacific. 90:81
New multicolor photometry is presented for 23 stars in the vicinity of the Scl open cluster. A number of methods for the determination of intrinsic colors and absolute magnitudes were used to compute a mean cluster color excess of E(B - V) = 0=00 and