Summary: A&A manuscript no.
(will be inserted by hand later)
Your thesaurus codes are:
08 ( 08.12.1 ; 08.01.2 ; 08.03.3 ; 02.12.1 )
The Ca i 4227 line as a chromospheric diagnostic for M
C. I. Short, J. G. Doyle, and P. B. Byrne
Armagh Observatory -- College Hill -- Armagh BT61 9DG -- N. Ireland
email: firstname.lastname@example.org -- email@example.com
Received !date? ; accepted !date?
Abstract. In M dwarfs the Ca i 4227 line is saturated,
therefore, the line core forms at a relatively small column
mass density. As a result, the line is a potential diagnostic
of chromospheric structure in these stars. We have calcu
lated line profiles out of LTE for a grid of early M dwarf
atmospheric models that spans the range from low to high