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.
Sarr, Steven H. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Neff, James E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
August 14, 2013
January 1, 1990
CONTRACT_GRANT: NAGW-112 CONTRACT_GRANT: NASA ORDER W-15130