# Dwarf Teff scale based on N=17923 Teff & MK spectral type pairs # Only spectral types with N >= 5 published Teff estimates are included. # Reported s are median values, and hence insensitive to outliers. # Eric Mamajek (U. Rochester) 8/9/2009 # SpT s.e.m. stdev #obs SpT O3.0V 47065 1203 5218 10 -57.0 4.6727 O4.0V 47100 1634 5695 17 -56.0 4.67302 O5.0V 47097 1050 2671 5 -55.0 4.67299 O7.0V 39392 3026 5680 7 -53.0 4.59541 O8.0V 37297 1163 3728 6 -52.0 4.57167 O9.0V 34153 1801 2808 8 -51.0 4.53343 B0.0V 31562 145 2123 31 -50.0 4.49916 B1.0V 25203 118 2045 83 -49.0 4.40145 B2.0V 19781 290 2112 180 -48.0 4.29625 B3.0V 17301 50 1642 208 -47.0 4.23807 B4.0V 16795 208 1641 66 -46.0 4.22518 B5.0V 15800 24 963 197 -45.0 4.19866 B6.0V 14901 141 847 94 -44.0 4.17322 B7.0V 13983 108 1000 83 -43.0 4.1456 B8.0V 12922 61 1136 263 -42.0 4.11133 B9.0V 11582 112 1055 286 -41.0 4.06378 A0.0V 9711 45 559 262 -40.0 3.98726 A1.0V 9182 26 512 195 -39.0 3.96294 A2.0V 8871 56 357 151 -38.0 3.94797 A3.0V 8510 15 358 174 -37.0 3.92993 A4.0V 8274 83 332 63 -36.0 3.91772 A5.0V 8097 63 397 108 -35.0 3.90832 A6.0V 8013 34 416 40 -34.0 3.9038 A7.0V 7856 28 286 117 -33.0 3.8952 A8.0V 7536 57 260 48 -32.0 3.87714 A9.0V 7423 32 356 90 -31.0 3.87058 F0.0V 7093 21 314 314 -30.0 3.85083 F1.0V 7087 24 193 69 -29.0 3.85046 F2.0V 6813 12 176 530 -28.0 3.83334 F3.0V 6705 6 143 838 -27.0 3.8264 F4.0V 6648 11 137 177 -26.0 3.82269 F5.0V 6511 7 147 1508 -25.0 3.81365 F6.0V 6356 8 148 1057 -24.0 3.80318 F7.0V 6270 7 155 962 -23.0 3.79727 F8.0V 6172 5 153 885 -22.0 3.79043 F9.0V 6060 13 142 329 -21.0 3.78247 G0.0V 5998 5 153 1131 -20.0 3.77801 G1.0V 5903 8 152 644 -19.0 3.77107 G2.0V 5884 6 155 751 -18.0 3.76967 G3.0V 5858 7 122 787 -17.0 3.76775 G4.0V 5678 19 108 78 -16.0 3.7542 G5.0V 5735 4 137 985 -15.0 3.75853 G6.0V 5620 7 128 341 -14.0 3.74974 G7.0V 5522 17 96 85 -13.0 3.7421 G8.0V 5490 5 134 566 -12.0 3.73957 G9.0V 5339 7 102 155 -11.0 3.72746 K0.0V 5284 8 148 410 -10.0 3.72296 K1.0V 5171 10 118 223 -9.0 3.71357 K2.0V 5022 12 119 270 -8.0 3.70088 K3.0V 4787 18 141 179 -7.0 3.68006 K4.0V 4592 21 128 61 -6.0 3.662 K5.0V 4413 28 260 95 -5.0 3.64473 K6.0V 4317 118 260 12 -4.0 3.63518 K7.0V 3970 21 193 81 -3.0 3.59879 M0.0V 3776 71 287 31 0.0 3.57703 M1.0V 3610 34 140 39 1.0 3.55751 M2.0V 3460 47 205 41 2.0 3.53908 M3.0V 3272 31 155 53 3.0 3.51481 M4.0V 3166 24 144 38 4.0 3.50051 M5.0V 2876 32 194 19 5.0 3.45879 M6.0V 2757 38 170 34 6.0 3.44044 M7.0V 2617 72 232 18 7.0 3.4178 M8.0V 2543 53 242 21 8.0 3.40535 M9.0V 2290 79 171 25 9.0 3.35984 L0.0V 2205 67 213 9 10.0 3.34341 L1.0V 2266 81 103 5 11.0 3.35526 L2.0V 2214 75 182 7 12.0 3.34518 L3.0V 1926 57 149 10 13.0 3.28466 L4.0V 1828 59 106 8 14.0 3.26198 L5.0V 1729 48 143 17 15.0 3.23779 L7.0V 1606 86 121 5 17.0 3.20575 L8.0V 1397 4 147 18 18.0 3.1452 T2.0V 1347 44 78 7 22.0 3.12937 T6.0V 972 35 135 12 26.0 2.98767 T7.0V 956 12 39 10 27.0 2.98046 T8.0V 753 16 36 8 28.0 2.87679