All Tables

• Table 1: Equivalent widths (mÅ) for B 12. Typical measurement uncertainties is <5 mÅ.
• Table 2: Atmospheric parameters and abundances of AV 304 together with the differential abundances derived for B 12 with the number of lines considered being given in parentheses. The errors for the former are taken from Hunter et al. (2005). For the latter they are the standard error among the lines of the same element; no error is given for N  II and Mg  II since only one feature contributed to these abundances. Also listed in this table are the parameters and abundances which one would obtain for B 12 assuming a disk was contributing 25% to the continuum flux. There are two sets of stellar parameters for each disk/no disk model; in each case the higher effective temperature is the one derived by taking the mean of the upper and lower limits set by the absence of the Si  IV and Si  II lines, while the lower value represents the effective temperature set by the absence of the Si  II lines only.