Table 1
Summary of the adopted parameters for each model.
| Model | Teff | log g | [Fe/H] | vt | Agive | logτ0 | logT0 | Remark |
|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
| STD | 6250 | 4.0 | 0, −1, −2, −3, −4, −5 | 1.5 | 2.64 | −∞ | ⋯ | standard model (no chromosphere) |
| tm30T40 | 6250 | 4.0 | 0, −1, −2, −3, −4, −5 | 1.5 | 2.64 | − 3 | 4.0 | |
| tm30T43 | 6250 | 4.0 | 0, −1, −2, −3, −4, −5 | 1.5 | 2.64 | − 3 | 4.3 | near the observed trend |
| tm30T45 | 6250 | 4.0 | 0, −1, −2, −3, −4, −5 | 1.5 | 2.64 | − 3 | 4.5 | near the observed trend |
| tm30T50 | 6250 | 4.0 | 0, −1, −2, −3, −4, −5 | 1.5 | 2.64 | − 3 | 5.0 |
Notes. (1) Model code. (2) Effective temperature (in K). (3) Logarithmic surface gravity in cgs units (in dex). (4) Metallicity represented by the differential logarithmic abundance of Fe relative to the Sun (in dex). (5) Microturbulent velocity (in km s−1). (6) Lithiumabundance (logarithmic number abundance in the usual normalization of AH = 12.00) assumed as given, which is the primordial value taken from Spergel et al. (2007). This Li abundance is used throughout this paper for NLTE calculations and for the evaluation of NLTE equivalent widths. (7) Logarithmic optical thickness of the assumed chromospheric layer just above the atmosphere. (8) Logarithmic temperature (in K) of the assumed chromospheric layer just above the atmosphere. (9) Specific remark.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.