Zobrazeno 1 - 10
of 20
pro vyhledávání: '"R. L. Riddle"'
Publikováno v:
Mon.Not.Roy.Astron.Soc. 330 (2002) 57
HR 1217 is a prototypical rapidly oscillating Ap star that has presented a test to the theory of nonradial stellar pulsation. Prior observations showed a clear pattern of five modes with alternating frequency spacings of 33.3 microHz and 34.6 microHz
Externí odkaz:
http://arxiv.org/abs/astro-ph/0111338
Autor:
Geraldine J. Peters, K. Marshall, Paramita Barai, V. Das, Anthony B. Kaye, R. P. Deo, A. Osterman, Chad Ogden, M. V. McSwain, Douglas R. Gies, R. L. Riddle, D. W. Wingert, Eunwoo Choi, W. Huang, J. L. Seymour
Publikováno v:
The Astrophysical Journal. 608:989-1000
We present an investigation of H-alpha emission line variations observed in the massive Algol binary, RY Per. We give new radial velocity data for the secondary based upon our optical spectra and for the primary based upon high dispersion UV spectra.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::951855252adcb7d3ab625b27b5f7616f
https://doi.org/10.1086/420875
https://doi.org/10.1086/420875
Autor:
N. Dolez, Pawel Moskalik, R. L. Riddle, Minia Manteiga, Gerald Handler, O. Suárez, Antonio Kanaan, W. Ogloza, J. E. Solheim, D. Kilkenny, B. N. Ashoka, Jaymie M. Matthews, Jian-Ning Fu, R. E. Nather, J. Krzesinski, M. S. O’Brien, T. J. Ahrens, Luciano Fraga, R. R. Shobbrook, Mukremin Kilic, Paul A. Bradley, Joyce A. Guzik, Eran O. Ofek, S. J. Kleinman, A. F. M. Costa, M. Müller, Nicole M. Silvestri, Elia M. Leibowitz, Margarida S. Cunha, T. K. Watson, R. Kalytis, Souza Oliveira Kepler, M. Chevreton, Fergal Mullally, O. Giovannini, Pierre Bergeron, Santosh Joshi, K. Sekiguchi, D. Ališauskas, Gilles Fontaine, E. G. Meištas, Atsuko Nitta, T. von Hippel, Divas Sanwal, Staszek Zola, D. J. Sullivan, R. Janulis, Anjum S. Mukadam, Donald E Winget, Xiao-Jun Jiang, D. W. Kurtz, Donal O'Donoghue, Roberto Silvotti, P. V. Birch, E. W. Klumpe, F. Johannessen, G. Vauclair, D. W. Xu, T. Sullivan, Matt A. Wood, P. Ibbetson, Ana Ulla, Michael D. Reed, T. S. Metcalfe, J. M. Gonzalez-Perez, S. Bernabei, Steven D. Kawaler
Publikováno v:
ResearcherID
Scopus-Elsevier
The Astrophysical Journal
The Astrophysical Journal, 2003, 594, pp.961-970. ⟨10.1086/377044⟩
Baltic Astronomy
Baltic Astronomy, 2003, 12, pp.71-103
CIÊNCIAVITAE
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
NASA Astrophysics Data System
Scopus-Elsevier
The Astrophysical Journal
The Astrophysical Journal, 2003, 594, pp.961-970. ⟨10.1086/377044⟩
Baltic Astronomy
Baltic Astronomy, 2003, 12, pp.71-103
CIÊNCIAVITAE
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
NASA Astrophysics Data System
We report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R548. On the basis of observations that span 31 years, we conclude that the period 213.13 s observed in ZZ C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fec0fe35bd8b0a44ba7cfeedb8296f55
https://doi.org/10.1086/377044
https://doi.org/10.1086/377044
Autor:
R. L. Riddle, S. D. Kawaler
Publikováno v:
Open Astronomy, Vol 12, Iss 2, Pp 193-204 (2003)
As the WET moves to CCD systems, we move away from the uniformity of the standard WET photometer into an arena where each system can be radically different. There are many possible CCD photometry systems that can fulfil the requirements of a WET inst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce3b8acc449e155dcbeadbabae8d0e9b
https://doaj.org/article/a68236ef86d5405ba61fb13aef13195e
https://doaj.org/article/a68236ef86d5405ba61fb13aef13195e
Autor:
R. L. Riddle
Publikováno v:
Open Astronomy, Vol 12, Iss 2, Pp 183-191 (2003)
For many years, the Whole Earth Telescope has used the QED software package, created by R. E. Nather, to reduce the data gathered from the WET standard, PMT based photometers. While essential for reducing this data, QED alone is not a sufficient pack
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f331cd57dbf25e8f6576f83bf2da4b2
https://doaj.org/article/2a88f28eb68c43f29d0b8c9cfb4a2e77
https://doaj.org/article/2a88f28eb68c43f29d0b8c9cfb4a2e77
Autor:
J. E. Solheim, T. Sullivan, Paul A. Bradley, J. M. Gonzalez Perez, E. G. Meištas, Encarni Romero-Colmenero, E. W. Klumpe, Thorsten Nagel, G. Vauclair, Stefan Dreizler, Waldemar Ogloza, J. Xiaojun, P. Martinez, F. Johannessen, M. Chevreton, Antonio Kanaan, Matt A. Wood, Sonja Schuh, Martha L. Boyer, Nicole M. Silvestri, J. N. Fu, A. Ulla, Donald E Winget, Kazuhiro Sekiguchi, Staszek Zola, Denis J. Sullivan, T. S. Metcalfe, Jam Shaw, R. L. Riddle, Atsuko Nitta, E. R. Nather, J. L. Deetjen, Donal O'Donoghue, Souza Oliveira Kepler, A. F. Murillo Costa, S. D. Kawaler, J. E. S. Costa, Anjum S. Mukadam, J. Larrison, T. J. Ahrens, A. Kyle Jones, J. KrzesiŃski, S. J. Kleinman, R. Kalytis, R. Janulis, A. E. Collins
Publikováno v:
Open Astronomy, Vol 12, Iss 1, Pp 45-53 (2003)
We report on the 323 hours of nearly uninterrupted time series photometric observations of the DBV star GD 358 acquired with the Whole Earth Telescope (WET) during May 23 to June 8, 2000. We acquired more than 232 000 independent measurements and det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a3cf679c3cd4153d318f01499cb835
http://www.degruyter.com/view/j/astro.2003.12.issue-1/astro-2017-0033/astro-2017-0033.xml?format=INT
http://www.degruyter.com/view/j/astro.2003.12.issue-1/astro-2017-0033/astro-2017-0033.xml?format=INT
Autor:
E. G. Meištas, O. Bärnbantner, U. Heber, O. Cordes, R. Kalytis, Stefan Dreizler, R. L. Riddle, J. Bochanski, S. Bernabei, Rimvydas Janulis, Sonja Schuh, Michael D. Reed, Stéphane Charpinet, D. Ališauskas, Roberto Silvotti, Roy Ostensen, Terry D. Oswalt, S. Marinoni, E. Goehler, Xiao-Jun Jiang, J. M. Gonzalez Perez, Nicole M. Silvestri, G. Carlson
Publikováno v:
Astronomy & Astrophysics. 389:180-190
In this article we present the results of more than 180 hours of time-series photometry on the low gravity (log g = 5.4, T e f f = 29 300 K, log He/H = -3.0 by number) sdB pulsating star HS 2201+2610, obtained between September 2000 and August 2001.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be108d14c60a1eaa59f088e1c0f5bae5
https://doi.org/10.1051/0004-6361:20020584
https://doi.org/10.1051/0004-6361:20020584
Publikováno v:
The Astrophysical Journal. 566:1069-1083
We present results from new optical and UV spectroscopy of the unusual binary system SS 433, and we discuss the relationship of the particular spectral components we observe to the properties of the binary. (1) The continuum spectrum which we associa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7432e9d72a5370378e55f8d98d4c6732
https://doi.org/10.1086/338335
https://doi.org/10.1086/338335
Publikováno v:
The Astrophysical Journal. 558:L43-L46
We present the first spectroscopic orbit for the massive X-ray binary LS 5039, which we find to be a short-period (P = 4.117 ± 0.011 days) and highly eccentric (e = 0.41 ± 0.05) system. The low-mass function for the orbit appears to be most consist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9a487eb0d9ed236f3bc5126b4d9b595
https://doi.org/10.1086/323571
https://doi.org/10.1086/323571
Publikováno v:
The Astrophysical Journal. 554:362-367
The star ι Ori (HD 37043, HR 1899) is a 29.1338 day period, double-lined O-type spectroscopic binary with a highly eccentric orbit. The classification of the primary (O9 III) is well established. The secondary, roughly 2 mag fainter, is generally ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::867ade4261c6fea8ea821fc5fcff9bb1
https://doi.org/10.1086/321367
https://doi.org/10.1086/321367