Tópico(s): Stellar, planetary, and galactic studies
1909 - IOP Publishing | The Astrophysical Journal
S. A. Drake, K. P. Singh, N. E. White, Theodore Simon,
... X-Ray Spectra of the Active Single Stars beta Ceti and pi 1 Ursae Majoris Drake, S. A. ; Singh, K. P. ; White, N. E. ; Simon, Theodore Abstract We present X-ray spectra obtained by ASCA of two single, active stars, the G dwarf pi(1) UMa, and the G9/K0 giant Beta Cet. The spectra of both stars require the ...
Tópico(s): Astronomy and Astrophysical Research
1994 - IOP Publishing | The Astrophysical Journal
Tópico(s): Planetary Science and Exploration
1918 - self-publishing | Observatory
William W. Campbell, Adelaide M. Hobe, G. F. Paddock,
Tópico(s): Historical Astronomy and Related Studies
1916 - Smithsonian Institution | Lick Observatory Bulletins
Tópico(s): Astronomical Observations and Instrumentation
2008 - self-publishing | Observatory
D. Bohlender, J. D. Landstreet,
... Weak Magnetic Field of the AP Star Epsilon Ursae Majoris Bohlender, David A. ; Landstreet, J. D. Abstract High-SNR circular polarization measurements in the wings of H-beta have been obtained for the bright A0pCr star ...
Tópico(s): Astrophysics and Star Formation Studies
1990 - IOP Publishing | The Astrophysical Journal
Tópico(s): Astronomy and Astrophysical Research
1909 - self-publishing | Observatory
Search Bar to Enter New Query quick field: Author First Author Abstract Year Fulltext Select a field or operator abstract abstract only acknowledgements affiliation arXiv category author count author bibcode bibliographic group bib abbrev, e.g. ApJ body of article data archive collection citation count doctype doi entdate first author fulltext identifier inst keyword object orcid page property publication full name date published title volume year citations() pos() references() reviews() similar() ...
Tópico(s): Atomic and Subatomic Physics Research
1891 - Institute of Physics | The Astronomical Journal
... horizon. At 11.10 one sped rapidly from Beta Ursæ Minoris through between Epsilon and Zeta (Mizar) Ursæ Majoris, and exploded in very brilliant white light. At ... a point 2° above Etanin, and disappeared near Beta Cygni. At 11.30 a large and brilliant but a transient meteor went from Omicron Ursæ Majoris, and disappeared in the tail of the Dragon. ...
Tópico(s): Astro and Planetary Science
1884 - Nature Portfolio | Nature
Byeong‐Cheol Lee, Inwoo Han, Myeong‐Gu Park, D. E. Mkrtichian, A. P. Hatzes, Gwanghui Jeong, Kang-Min Kim,
We report that the spectroscopic binary ? Ursae Majoris (?mu UMa) has secondary RV variations of 471.2 days in addition to those of 230.0 days already known. Keplerian orbit ...
Tópico(s): Astrophysical Phenomena and Observations
2016 - Institute of Physics | The Astronomical Journal
Geary E. Albright, Mercedes T. Richards,
... Export Citation NASA/ADS Circumstellar Material in TX Ursae Majoris Albright, Geary E. ; Richards, Mercedes T. Abstract The ...
Tópico(s): Stellar, planetary, and galactic studies
1993 - IOP Publishing | The Astrophysical Journal
J. R. Thorstensen, R. A. Wade, J. B. Oke,
... Spectroscopic Study of the Cataclysmic Binary Star SU Ursae Majoris Thorstensen, John R. ; Wade, Richard A. ; Oke, J. ...
Tópico(s): Stellar, planetary, and galactic studies
1986 - IOP Publishing | The Astrophysical Journal
Yu Bai, Stephen Justham, Jifeng Liu, Jincheng Guo, Qing Gao, Hang Gong,
We present spectra of the extreme polar AR Ursae Majoris (AR UMa) which display a clear Al I ...
Tópico(s): Astrophysical Phenomena and Observations
2016 - IOP Publishing | The Astrophysical Journal
D. Shulyak, Jiřı́ Krtička, Zdeněk Mikulášek, O. Kochukhov, T. Lüftinger,
We simulate the light variability of the Ap star epsUMa using the observed surface distributions of Fe, Cr, Ca, Mn, Mg, Sr and Ti obtained with the help of Doppler Imaging technique. Using all photometric data available we specified light variations of epsUMa modulated by its rotation from far UV to IR. We employed the LLmodels stellar model atmosphere code to predict the light variability in different photometric systems. The rotational period of epsUMa is refined to 5d088631(18). It is shown that ...
Tópico(s): Astro and Planetary Science
2010 - EDP Sciences | Astronomy and Astrophysics
J. S. Jurcevic, R. K. Honeycutt, E. M. Schlegel, R. F. Webbink,
Time resolved spectroscopy of the dwarf nova BZ UMa revelas periodic velocity variations in the hydrogen emission lines with P = 97.9 ± 0.1 minutes and K = 73 ± 6 km s-1. CCD photometry over a 16-month interval shows three outbursts of about 4 mag with a mean separation of 181 days. The mean FWHM for the H-beta emission is large, prompting a re-calibration of the FWHM/K vs. mass ratio relation, giving a mass ratio (MRD/MWD) of 0.20 for BZ UMa. The short period, long outburst interval, and small mass ratio ...
Tópico(s): X-ray Spectroscopy and Fluorescence Analysis
1994 - Institute of Physics | Publications of the Astronomical Society of the Pacific
J. A. Eaton, C.-C. Wu, S. M. Ruciński,
view Abstract Citations (83) References (48) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet colors of W UMa : gravity darkening, temperature differences and the cause of W-type light curves. Eaton, J. A. ; Wu, C. -C. ; Rucinski, S. M. Abstract The paper presents photometry of the prototype W UMa binary system in three ultraviolet bands with the ANS satellite. It was found that W UMa has low-gravity darkening beta of 0.03; that temperature differences between ...
Tópico(s): Astro and Planetary Science
1980 - IOP Publishing | The Astrophysical Journal
James Liebert, S. Tapia, Howard E. Bond, A. D. Grauer,
view Abstract Citations (33) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The 1979 minimum state of an UMa. Liebert, J. ; Tapia, S. ; Bond, H. E. ; Grauer, A. D. Abstract Spectrophotometry, photometry, and circular polarimetry are reported of the magnetic binary AN UMa during February/March 1979, when it reached a very low state of B (approximately 19-20), 2 mag fainter than ever observed previously. The B light curve was generally similar in shape to that ...
Tópico(s): Solar and Space Plasma Dynamics
1982 - IOP Publishing | The Astrophysical Journal
Sebastian Lipari, R. F. Sisteró,
The thermal decoupling degree of short-period contact or near-contact systems is studied. Statistics of well-observed W UMa systems including new beta-light-curve objects was made for thermal-decoupling degree, spectral type, and orbital period. W UMa systems of type A and W are found to be well characterized by these parameters. W-type objects show a good (linear) correlation in the spectral type vs. thermal-decoupling parameter diagram. This extends to the lower border of the diagram for A-type ...
Tópico(s): High-pressure geophysics and materials
1988 - Institute of Physics | Publications of the Astronomical Society of the Pacific