THE ACTIVITY AND VARIABILITY OF THE SUN AND SUN-LIKE STARS. II. CONTEMPORANEOUS PHOTOMETRY AND SPECTROSCOPY OF BRIGHT SOLAR ANALOGS

We present 14 years of contemporaneous photometric and spectroscopic observations of 28 solar analog stars, taken with the Tennessee State University Automatic Photometric Telescopes at Fairborn Observatory and the Solar-Stellar Spectrograph at Lowell Observatory. These are the best observed and mos...

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Veröffentlicht in:	The Astronomical journal 2009-07, Vol.138 (1)
Hauptverfasser:	Hall, Jeffrey C., Lockwood, G. Wesley, Skiff, Brian A., Henry, Gregory W., Saar, Steven H.
Format:	Artikel
Sprache:	eng
Schlagworte:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BRIGHTNESS CORRELATIONS FACULAE GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE INDEXES LUMINOSITY PHOTOMETRY SPECTROSCOPY SUN TELESCOPES
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container_title	The Astronomical journal
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creator	Hall, Jeffrey C. Lockwood, G. Wesley Skiff, Brian A. Henry, Gregory W. Saar, Steven H.
description	We present 14 years of contemporaneous photometric and spectroscopic observations of 28 solar analog stars, taken with the Tennessee State University Automatic Photometric Telescopes at Fairborn Observatory and the Solar-Stellar Spectrograph at Lowell Observatory. These are the best observed and most nearly Sun-like of the targets in our magnitude-limited (V {
doi_str_mv	10.1088/0004-6256/138/1/312;COUNTRYOFINPUT:INTERNATIONALATOMICENERGYAGENCY(IAEA)
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The correlations between luminosity and activity reveal the expected inverse activity-brightness correlations for active stars. Strong direct correlations between activity and brightness are not prevalent for the less active solar age stars, but are precision limited. The Sun does not appear to have unusually low photometric variability when compared with the most Sun-like inactive solar analogs. We present evidence that the activity index R'{sub HK} is not a good discriminant of Maunder Minimum candidate stars. 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Wesley</creatorcontrib><creatorcontrib>Skiff, Brian A.</creatorcontrib><creatorcontrib>Henry, Gregory W.</creatorcontrib><creatorcontrib>Saar, Steven H.</creatorcontrib><title>THE ACTIVITY AND VARIABILITY OF THE SUN AND SUN-LIKE STARS. II. CONTEMPORANEOUS PHOTOMETRY AND SPECTROSCOPY OF BRIGHT SOLAR ANALOGS</title><title>The Astronomical journal</title><description>We present 14 years of contemporaneous photometric and spectroscopic observations of 28 solar analog stars, taken with the Tennessee State University Automatic Photometric Telescopes at Fairborn Observatory and the Solar-Stellar Spectrograph at Lowell Observatory. These are the best observed and most nearly Sun-like of the targets in our magnitude-limited (V {<=} 7.5) sample. The correlations between luminosity and activity reveal the expected inverse activity-brightness correlations for active stars. Strong direct correlations between activity and brightness are not prevalent for the less active solar age stars, but are precision limited. The Sun does not appear to have unusually low photometric variability when compared with the most Sun-like inactive solar analogs. We present evidence that the activity index R'{sub HK} is not a good discriminant of Maunder Minimum candidate stars. 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The Sun does not appear to have unusually low photometric variability when compared with the most Sun-like inactive solar analogs. We present evidence that the activity index R'{sub HK} is not a good discriminant of Maunder Minimum candidate stars. On the basis of a star that appears to have transitioned from a low-variability state to a cycling state, we investigate the regime in which stars might switch from faculae-dominated to spot-dominated variations.</abstract><cop>United States</cop><doi>10.1088/0004-6256/138/1/312;COUNTRYOFINPUT:INTERNATIONALATOMICENERGYAGENCY(IAEA)</doi></addata></record>
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subjects	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BRIGHTNESS CORRELATIONS FACULAE GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE INDEXES LUMINOSITY PHOTOMETRY SPECTROSCOPY SUN TELESCOPES
title	THE ACTIVITY AND VARIABILITY OF THE SUN AND SUN-LIKE STARS. II. CONTEMPORANEOUS PHOTOMETRY AND SPECTROSCOPY OF BRIGHT SOLAR ANALOGS
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