Figure 72

Figure 72: Relationship between the effective surface temperature Teff, as measured by an observer at infinity, and the local temperature at the bottom of the heat-blanketing envelope, Tb (at ρb = 1011 g cm −3). Calculations performed for the ground-state (Fe) and partly-accreted envelopes of mass ΔM. Numbers − 16,...,− 7 indicate log (ΔM ∕M ) 10 for a 1.4 M ⊙ star with surface gravity g14 = 2.43 (in units of 1014 cm s–2). Symbols in parentheses indicate chemical composition of accreted envelope.