Secular instabilities of stellar systems: slow mode approach

2008 ◽  
pp. 93-104
Author(s):  
E. V. Polyachenko ◽  
V. L. Polyachenko ◽  
I. G. Shukhman
Keyword(s):  
Stellar Systems ◽  
Slow Mode

Desiderata in connection by the calibration of the MK-system

1966 ◽  
Vol 24 ◽  
pp. 348-349
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Absolute Magnitude ◽  
Review Article ◽  
Stellar Systems ◽  
Astronomical Data ◽  
Intrinsic Colour

This is only an informal remark about some difficulties I am worrying about.I have tried to recalibrate the MK system in terms of intrinsic colour (B–V)0and absolute magnitudeMv. The procedures used have been described in a review article by Voigt (Mitt. Astr. Ges.1963, p. 25–35), and the results for stars of the luminosity classes Ia-O,I and II have been given also in Blaauw's article on the calibration of luminosity criteria in vol. III (Basic Astronomical Data, p. 401) ofStars and Stellar Systems.

Symbiotic Stars at Optical, Infrared and Radio Wavelengths

1979 ◽  
Vol 46 ◽  
pp. 125-149 ◽  
Author(s):  
David A. Allen
Keyword(s):  
Temperature Regime ◽  
Type Star ◽  
Stellar Systems ◽  
Symbiotic Stars ◽  
Lower Excitation ◽  
Definition Of ◽  
Original Type

No paper of this nature should begin without a definition of symbiotic stars. It was Paul Merrill who, borrowing on his botanical background, coined the termsymbioticto describe apparently single stellar systems which combine the TiO absorption of M giants (temperature regime ≲ 3500 K) with He II emission (temperature regime ≳ 100,000 K). He and Milton Humason had in 1932 first drawn attention to three such stars: AX Per, CI Cyg and RW Hya. At the conclusion of the Mount Wilson Ha emission survey nearly a dozen had been identified, and Z And had become their type star. The numbers slowly grew, as much because the definition widened to include lower-excitation specimens as because new examples of the original type were found. In 1970 Wackerling listed 30; this was the last compendium of symbiotic stars published.

scholarly journals PROPERTIES OF QUASI-RELAXED STELLAR SYSTEMS IN AN EXTERNAL TIDAL FIELD

2009 ◽  
Vol 703 (2) ◽  
pp. 1911-1922 ◽  
Author(s):  
A. L. Varri ◽  
G. Bertin
Keyword(s):  
Stellar Systems

scholarly journals Researches on the Evolution of the Stellar Systems

Nature ◽  
1911 ◽  
Vol 87 (2183) ◽  
pp. 275-275
Keyword(s):  
Stellar Systems

scholarly journals Stability of rotating spherical stellar systems

2002 ◽  
Vol 395 (1) ◽  
pp. 25-30 ◽  
Author(s):  
A. Meza
Keyword(s):  
Stellar Systems

Ultralong-period Cepheids: a possible primary distance indicator?

2012 ◽  
Vol 8 (S289) ◽  
pp. 282-286 ◽  
Author(s):  
G. Fiorentino ◽  
F. Annibali ◽  
G. Clementini ◽  
R. Contreras Ramos ◽  
M. Marconi ◽  
...  
Keyword(s):  
Spiral Galaxies ◽  
Hubble Space Telescope ◽  
Hubble Constant ◽  
Variable Stars ◽  
Evolutionary Status ◽  
Stellar Systems ◽  
Classical Cepheids ◽  
Type Ia ◽  
Distance Indicator ◽  
Crucial Test

AbstractWe present a project that aims to provide a complete theoretical and observational framework for an as yet unexplored class of variable stars, the ultralong-period Cepheids (P longer than 80–100 days). Given their very high luminosities (MV up to −7 mag), with the Hubble Space Telescope we will be able to observe them easily in stellar systems located at large distances (~ 100 Mpc). This limit will be further increased, out to the Hubble flow (~ 350 Mpc), using future ground-based facilities such as the European Extremely Large Telescope. The nature of their pulsation is as yet unclear, as is their evolutionary status, which seems different from the central helium-burning phase generally associated with classical Cepheids. These objects have been found to cover a very large metallicity range, from [Fe/H] ~ −2 dex to solar values, and they are located in heterogeneous stellar systems, from dwarf to spiral galaxies. Once completely characterized, they could provide a crucial test, since they have been found in all Type Ia supernova host spiral galaxies that have been monitored for variability over long periods and that currently offer sound constraints on the estimated value of the Hubble constant.

NEW STELLAR SYSTEMS

Science ◽  
1925 ◽  
Vol 61 (1573) ◽  
pp. x-x
Keyword(s):  
Stellar Systems

scholarly journals Uniting old stellar systems: from globular clusters to giant ellipticals

2008 ◽  
Vol 389 (4) ◽  
pp. 1924-1936 ◽  
Author(s):  
Duncan A. Forbes ◽  
Paul Lasky ◽  
Alister W. Graham ◽  
Lee Spitler
Keyword(s):  
Globular Clusters ◽  
Stellar Systems
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