Zobrazeno 1 - 10
of 510
pro vyhledávání: '"Adelman, S."'
Autor:
Mathys, G., Romanyuk, I. I., Kudryavtsev, D. O., Landstreet, J. D., Pyper, D. M., Adelman, S. J.
Publikováno v:
A&A 586, A85 (2016)
Context. The existence of a significant population of Ap stars with very long rotation periods (up to several hundred years) has progressively emerged over the past two decades. However, only lower limits of the periods are known for most of them bec
Externí odkaz:
http://arxiv.org/abs/1601.00867
Autor:
Adelman, S.
Background: As the elderly population in Britain continues to grow, so will the number of people with dementia. Notably, those affected will include an increasing proportion of people from black and minority ethnic (BME) communities, as they too are
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.564888
Autor:
Royer, F., Gebran, M., Monier, R., Adelman, S., Smalley, B., Pintado, O., Reiners, A., Hill, G., Gulliver, A.
Context. The study of rotational velocity distributions for normal stars requires an accurate spectral characterization of the objects in order to avoid polluting the results with undetected binary or peculiar stars. This piece of information is a ke
Externí odkaz:
http://arxiv.org/abs/1401.2372
Deneb is often considered the prototypical A-type supergiant, and is one of the visually most luminous stars in the Galaxy. A-type supergiants are potential extragalactic distance indicators, but the variability of these stars needs to be better char
Externí odkaz:
http://arxiv.org/abs/1009.5994
Autor:
Puzeras, E., Tautvaisiene, G., Cohen, J. G., Gray, D. F., Adelman, S. J., Ilyin, I., Chorniy, Y.
The main atmospheric parameters and abundances of the iron group elements (vanadium, chromium, iron, cobalt and nickel) are determined for 62 red giant "clump" stars revealed in the Galactic field by the Hipparcos orbiting observatory. The stars form
Externí odkaz:
http://arxiv.org/abs/1006.3857
We provide a quantitative analysis of time-variable phenomena in the photospheric, near-star, and outflow regions of the late-B supergiant (SG) HD 199478. The analysis is based primarily on optical spectroscopic datasets secured between 1999 and 2000
Externí odkaz:
http://arxiv.org/abs/0806.0929
Autor:
Zavala, R. T., Adelman, S. J., Hummel, C. A., Gulliver, A. F., Caliskan, H., Armstrong, J. T., Hutter, D. J., Johnston, K. J., Pauls, T. A.
Publikováno v:
Astrophys.J.655:1046-1057,2007
Observations of the Mercury-Manganese star Phi Herculis with the Navy Prototype Optical Interferometer (NPOI) conclusively reveal the previously unseen companion in this single-lined binary system. The NPOI data were used to predict a spectral type o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610811
Autor:
Adelman, S. J., Gulliver, A. F., Smalley, B., Pazder, J. S., Younger, P. F., Boyd, L., Epand, D.
A cross-dispersed spectrophotometer with CCD detector and its automated 0.5-m telescope at the Fairborn Observatory, now under construction, should begin observations in 6 to 9 months. The Citadel ASTRA Telescope will be able to observe Vega the prim
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409113
We performed a spectroscopic study of the SB2 Mercury-Manganese star alpha And. Our measurements of the secondary's radial velocities result in improved orbital elements. The secondary shows abundances typical of the metallic-line stars: a Ca deficie
Externí odkaz:
http://arxiv.org/abs/astro-ph/9805205
A careful investigation of a CCD spectrum of the SB1 system kappa Cnc in the spectral region 3800 A - 8000 A resulted in the discovery of the lines of the secondary star. We then analyzed several short-wavelength range Reticon spectra obtained at dif
Externí odkaz:
http://arxiv.org/abs/astro-ph/9805143