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Spot temperatures and area coverages on active dwarf starsTwo active K dwarfs are examined to determine the temperatures of the stars and to estimate the locations and sizes of cool spots on the stellar surfaces. Two wavelength regions with TiO absorption bands at different temperature sensitivities are modeled simultaneously using the method developed by Huenemoerder and Ramsey (1987). The spectrum of BD +26deg730 shows excess absorption in the TiO band, and the absence of the 8860 A band in HD 82558 indicates that its spots are warmer than those of BD +26deg730.
Document ID
19910060280
Document Type
Conference Paper
Authors
Sarr, Steven H. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Neff, James E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-112
CONTRACT_GRANT: NASA ORDER W-15130
Distribution Limits
Public
Copyright
Other