Zobrazeno 1 - 10
of 47
pro vyhledávání: '"R. R. Cadmus"'
Autor:
R. R. Cadmus
Publikováno v:
The Astronomical Journal. 161:75
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cc7a1abc7cb149a6cf12376d96c0236
https://doi.org/10.3847/1538-3881/abcd9c
https://doi.org/10.3847/1538-3881/abcd9c
Publikováno v:
The Astrophysical Journal. 685:L145-L148
For two stars (R UMi and RS Cyg) believed to behave chaotically, we demonstrate that nonlinear forecasting is possible over a time horizon of about a year and calculate their future light curves, verifiable after photometric measurements take place.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cd93801dcac6d510161b2967bee6323
https://doi.org/10.1086/592745
https://doi.org/10.1086/592745
Publikováno v:
The Astrophysical Journal. 613:532-547
An analysis of the photometric observations of the light curves of the five large amplitude, irregularly pulsating stars R UMi, RS Cyg, V CVn, UX Dra and SX Her is presented. First, multi-periodicity is eliminated for these pulsations, i.e. they are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf464cacc91ecbb74ba6dc04e15d5517
https://doi.org/10.1086/422903
https://doi.org/10.1086/422903
Autor:
R. R. Cadmus
Publikováno v:
American Journal of Physics. 67:665-669
It is now practical for undergraduate students to carry out a laboratory exercise in which they determine an approximate age for the universe using their own data. Because of the wide availability and excellent performance of charge-coupled device ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be9ebff4dbae0c2c9f519939d51cf89e
https://doi.org/10.1119/1.19350
https://doi.org/10.1119/1.19350
Publikováno v:
AIP Conference Proceedings.
The light curves (time series of the radiated energy) of most large amplitude, pulsating stars such as the well known Cepheid stars are regular. However, a smaller group of variable stars that are located next to them in the Hertzsprung- Russell diag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f86b4cb0e85a54a35ad4c2641f510f73
https://doi.org/10.1063/1.1487521
https://doi.org/10.1063/1.1487521
Autor:
R. R. Cadmus
Publikováno v:
American Journal of Physics. 58:397-399
A specialized image‐processing device, the video peak store, can be used to enhance significantly a variety of physics lecture demonstrations by combining information from many video frames into a single composite frame. The use of this technology
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7e01a83f4a04bf046c2774d3c2e0a5a
https://doi.org/10.1119/1.16483
https://doi.org/10.1119/1.16483
Publikováno v:
Astrophysical Masers ISBN: 9783540563433
We have monitored the 22 GHz H2O maser line from 22 LPVs since 1987. All stars show highly variable water maser emission with most Miras having a phase lag of 0.3 phase between the water maser and optical emission. VX UMa appears to show variations a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::092d797c7899893ace726133f51b1a34
https://doi.org/10.1007/3-540-56343-1_259
https://doi.org/10.1007/3-540-56343-1_259
Publikováno v:
Astrophysical Masers ISBN: 9783540563433
The water maser spectra of V778 Cyg show periodic variations with the same period as the optical carbon star (P=302d). However, a phaselag of 0.23 is present. The central velocity of the features may show long term variability. The 22 GHz spectra of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::056bbfe2e71eff5413bb0c1afaf5c7fc
https://doi.org/10.1007/3-540-56343-1_265
https://doi.org/10.1007/3-540-56343-1_265
Publikováno v:
Astrophysical Journal; 10/ 1/2008, Vol. 685 Issue 2, pL145-L148, 4p
Publikováno v:
The Astronomical Journal. 101:1043
Both the amplitude and period of the light variations of the semiregular long-period variables RV And, S Aql, and U Boo dramaticaly decreased, and then suddenly increased, in recent years. These observations, in conjunction with spectroscopic data, s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a79178faa5b23148f0de3aee98101df
https://doi.org/10.1086/115746
https://doi.org/10.1086/115746