def plot_Teff_logg(path):
    iso = read_MIST_iso(path)
    # print([x/1e9 for x in list(iso.keys())])
    header = iso[list(iso.keys())[0]].columns
    isoAtAge = interp_isochrone_age(iso, 14.174741629268077)
    df = pd.DataFrame(isoAtAge, columns=header)
    fig, ax = plt.subplots(1, 1, figsize=(10,7))
    ax.plot(10**df["log_Teff"].values, df["log_g"].values, 'o-', markersize=2)
    ax.invert_yaxis()
    ax.invert_xaxis()