Do We Know of Any Maunder Minimum Stars

@article{Wright2004DoWK,
  title={Do We Know of Any Maunder Minimum Stars},
  author={Jason T. Wright},
  journal={The Astronomical Journal},
  year={2004},
  volume={128},
  pages={1273-1278}
}
  • Jason T. Wright
  • Published 15 June 2004
  • Physics, Geology
  • The Astronomical Journal
Most stars previously identified as Maunder minimum stars are old and evolved off the main sequence. Analysis of activity measurements from the California and Carnegie Planet Search program stars and Hipparcos parallaxes implies that the canonical relation between age and chromospheric activity breaks down for stars older than ~6 Gyr when activity is calculated from Mount Wilson S-values. Stars only 1 mag above the main sequence exhibit significantly suppressed activity levels, which have been… 
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References

SHOWING 1-10 OF 22 REFERENCES
Chromospheric Ca II Emission in Nearby F, G, K, and M Stars*
We present chromospheric Ca II H and K activity measurements, rotation periods, and ages for ~1200 F, G, K, and M type main-sequence stars from ~18,000 archival spectra taken at Keck and Lick…
The chromospheric emission-age relation for stars of the lower main sequence and its implications for the star formation rate
An attempt is made to formulate the relationship between age and chromospheric emission (CE) in late-type dwarf stars. Evidence is reviewed that a deterministic relationship of this type actually…
Echelle spectroscopy of Ca II HK activity in Southern Hemisphere planet search targets
We present the results of ultraviolet echelle spectroscopy of a sample of fifty nine F,G,K and M stars from the Anglo-Australian Planet Search target list. Ca II activity indices, which are essential…
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I.
We have embarked on a project, under the aegis of the Nearby Stars (NStars)/Space Interferometry Mission Preparatory Science Program, to obtain spectra, spectral types, and, where feasible, basic…
The Vienna-KPNO search for Doppler-imaging candidate stars - I. A catalog of stellar-activity indicators for 1058 late-type Hipparcos stars
We present the results from a spectroscopic Ca II HK 23% with strong emission, 36% with moderate emission, and 41% with weak emission. These spectra are used to determine absolute H&K emission-line…
Spectroscopy of the CA II K Line of Metal-Poor Field Red Giants. I. Southern Hemisphere Observations
Spectra of the Ca II K line have been obtained for a sample of field metal-poor red giants. Strong chromospheric emission is found to be quite common among such giants of absolute magnitude brighter…
Long-term solar brightness changes estimated from a survey of Sun-like stars
THE brightness of the Sun varies during the 11-year solar cycle, typically by less than 0.1% (refs 1, 2), and a larger brightness variation is thought to have occurred during the Maunder minimum,…
Ca II H and K measurements made at Mount Wilson Observatory, 1966-1983
Summaries are presented of the photoelectric measurements of stellar Ca II H and K line intensity made at Mount Wilson Observatory during the years 1966-1983. These results are derived from 65,263…
Evidence for long-term brightness changes of solar-type stars
CHANGES in the brightness of the Sun may introduce further uncertainties into forecasts of global warming by the greenhouse effect. The Sun is known to vary in brightness, on a timescale of years, by…
On the link between rotation, chromospheric activity and Li abundance in subgiant stars
The connection rotation-CaII emission flux-lithium abundance is analyzed for a sample of bona fide subgiant stars, with evolutionary status determined from HIPPARCOS trigonometric parallax…
...
1
2
3
...