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Star Populations and the Solar Neighborhood

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Star Populations and the Solar Neighborhood Sp.-V/AQuan/1999/10/11:10:50 Page 471 Chapter 19 Star Populations and the Solar Neighborhood Gerard F. Gilmore and Michael Zeilik 19.1 The Nearby Stars ..................... 471 19.2 The Brightest Stars .................... 475 19.3 Stellar Populations ..................... 478 19.4 Star Counts at High Latitudes .............. 480 19.5 Vertical Stellar Density Profile .............. 481 19.6 Main Sequence Field Stellar Luminosity Function ................... 485 19.7 White Dwarf Luminosity Function ........... 485 19.8 Luminosity Class Distribution for Nearby Field Stars .................... 486 19.9 Mass Density in the Solar Neighborhood ....... 487 19.10 Stellar Mass Function .................. 488 19.11 Solar Motion and Kinematics of Nearby Stars ........................ 493 19.1 THE NEARBY STARS Table 19.1 lists the 100 nearest stars to the Earth in order of increasing distance. Positions are calculated from observed positions with corrections for proper motions; they are given in the FK5 system with equinox = J2000.0 and epoch = J2000.0. The first column gives the identifier in the Hipparcos 471 Sp.-V/AQuan/1999/10/11:10:50 Page 472 472 / 19 STAR POPULATIONS AND THE SOLAR NEIGHBORHOOD Catalogue [1]; the last column gives the parallax in milliarcsecs with the associated standard deviation error. Table 19.1. Nearby stars. HD α (2000.0) HIP number δ (2000.0) Other name Sp. type V magnitude Abs VB− V Parallax 70890 N/A 14 29 42.95 α Cen C M5 Ve 11.01 15.45 +1.81 772.33 ± 2.42 −62 40 46.1 71681 128621 14 39 35.08 α Cen B K1 V 1.35 5.70 +0.88 742.12 ± 1.40 −60 50 13.8 71683 128620 14 39 36.50 α Cen A G2 V −0.01 4.34 +0.71 742.12 ± 1.40 −60 50 02.3 87937 N/A 17 57 48.50 Barnard’s star M5 V 9.54 13.24 +1.57 549.01 ± 1.58 +04 41 36.2 54035 95735 11 03 20.19 Gl 411 M2 Ve 7.49 10.46 +1.50 392.40 ± 0.91 +35 58 11.6 32349 48915 06 45 08.92 α CMa A1 V −1.44 1.45 +0.01 379.21 ± 1.58 −16 41 58.0 92403 N/A 18 49 49.36 Gl 729 M4.5 Ve 10.37 13.00 +1.51 336.48 ± 1.82 −23 50 10.4 16537 22049 03 32 55.84 Eri K2 V 3.72 6.18 +0.88 310.75 ± 0.85 −09 27 29.7 114046 217987 23 05 52.04 Gl 887 M2 Ve 7.35 9.76 +1.48 303.90 ± 0.87 −35 51 11.1 57548 N/A 11 47 44.40 Ross 128 M4.5 V 11.12 13.50 +1.75 299.58 ± 2.20 +00 48 16.4 104214 201091 21 06 53.94 61 Cyg A K5 Ve 5.20 7.49 +1.07 287.13 ± 1.51 +38 44 57.9 37279 61421 07 39 18.12 α CMi F5 IV–V 0.40 2.68 +0.43 285.93 ± 0.88 +05 13 30.0 104217 201092 21 06 55.26 61 Cyg B K7 Ve 6.05 8.33 +1.31 285.42 ± 0.72 +38 44 31.4 91772 173740 18 42 46.90 Gl 725B M5 V 9.70 11.97 +1.56 284.48 ± 5.01 +59 37 36.6 91768 173739 18 42 46.69 Gl 725A M4 V 8.94 11.18 +1.50 280.28 ± 2.57 +59 37 49.4 1475 1326 00 18 22.89 GX And M2 V 8.09 10.33 +1.56 280.27 ± 1.05 +44 01 22.6 108870 209100 22 03 21.66 Ind K5 Ve 4.69 6.89 +1.06 275.76 ± 0.69 −56 47 09.5 8102 10700 01 44 04.08 τ Cet G8 Vp 3.49 5.68 +0.73 274.17 ± 0.80 −15 56 14.9 5643 N/A 01 12 30.64 Gl 54.1 M5.5 Ve 12.10 14.25 +1.85 269.05 ± 7.57 −16 59 56.3 36208 N/A 07 27 24.50 Luyten’s star M3.5 9.84 11.94 +1.57 263.26 ± 1.43 +05 13 32.8 24186 33793 05 11 40.58 Kapteyn’s star M0 V 8.86 10.89 +1.55 255.26 ± 0.86 −45 01 06.3 105090 202560 21 17 15.27 AX Mic M0 Ve 6.69 8.71 +1.40 253.37 ± 1.13 −38 52 02.5 110893 239960 22 27 59.47 Kruger 60 M2 V 9.59 11.58 +1.61 249.52 ± 3.03 +57 41 45.1 30920 N/A 06 29 23.40 Ross 614 M4.5 Ve 11.12 13.05 +1.69 242.89 ± 2.64 −02 48 50.3 72511 N/A 14 49 34 N/A N/A 11.72 13.58 N/A 235.24 ± 22.43 −26 06 22 80824 N/A 16 30 18.06 Wolf 1061 M3.5 10.10 11.95 +1.58 234.51 ± 1.82 −12 39 45.3 439 225213 00 05 24.43 Gl 1 M4 V 8.56 10.36 +1.46 229.33 ± 1.08 −37 21 26.5 15689 N/A 03 22 05.50 N/A N/A 12.16 13.94 N/A 227.45 ± 61.79 −13 16 43.8 3829 N/A 00 49 09.90 Van Maanen 2 DG 12.37 14.15 +0.55 226.95 ± 5.35 +05 23 19.0 72509 N/A 14 49 31.76 Gl 563.2 M3 12.07 13.80 +1.52 221.80 ± 69.07 −26 06 42.0 86162 N/A 17 36 25.90 BD +68 946 M3.5 Vvar 9.15 10.81 +1.50 220.85 ± 0.92 +68 20 20.9 Sp.-V/AQuan/1999/10/11:10:50 Page 473 19.1 THE NEARBY STARS / 473 Table 19.1. (Continued.) HD α (2000.0) HIP number δ (2000.0) Other name Sp. type V magnitude Abs VB− V Parallax 85523 N/A 17 28 39.95 Gl 674 M3 9.38 11.10 +1.55 220.43 ± 1.63 −46 53 42.7 114110 N/A 23 06 39 GJ 293 DC 12.24 13.92 −0.17 216.52 ± 18.28 −14 52 19 57367 N/A 11 45 42.92 Gl 440 DQ6 11.50 13.18 +0.20 216.40 ± 2.11 −64 50 29.5 113020 79210 22 53 16.73 Ross 780 M5 V 10.16 11.80 +1.60 212.69 ± 2.10 −14 15 49.3 54211 79211 11 05 28.58 Gl 412A M2 Ve 8.82 10.40 +1.54 206.94 ± 1.19 +43 31 36.4 49908 88230 10 11 22.14 Gl 380 K2 Ve 6.60 8.16 +1.33 205.22 ± 0.81 +49 27 15.3 82725 N/A 16 54 32.47 N/A N/A 11.72 13.26 N/A 203.01 ± 29.27 −62 24 12.0 85605 N/A 17 29 36.25 N/A N/A 11.39 12.92 +1.10 202.69 ± 39.48 +24 39 14.7 106440 204961 21 33 33.98 Gl 832 M1 V 8.66 10.19 +1.52 202.53 ± 1.33 −49 00 32.4 86214 N/A 17 37 03.66 Gl 682 M3.5 10.94 12.43 +1.66 198.32 ± 2.43 −44 19 09.2 19849 26965 04 15 16.32 ω 2 Eri K1 Ve 4.43 5.92 +0.82 198.24 ± 0.84 −07 39 10.3 112460 N/A 22 46 49.73 EV Lac M4.5 Ve 10.29 11.77 +1.54 198.07 ± 2.05 +44 20 02.4 88601 165341 18 05 27.29 70 Oph K0 Ve 4.03 5.50 +0.86 196.62 ± 1.38 +02 30 00.4 97649 187642 19 50 47.00 α Aql A7 IV–V 0.76 2.20 +0.22 194.44 ± 0.94 +08 52 06.0 1242 N/A 00 15 28.11 L722-22 M4 11.49 12.90 +1.75 191.86 ± 17.24 −16 08 01.7 57544 N/A 11 47 41.38 Gl 445 M4 V 10.80 12.14 +1.57 185.48 ± 1.43 +78 41 28.2 67155 119850 13 45 43.78 Wolf 498 M4 Ve 8.46 9.79 +1.44 184.13 ± 1.27 +14 53 29.5 103039 N/A 20 52 33.02 N/A N/A 11.41 12.71 +1.65 182.15 ± 3.68 −16 58 29.1 21088 N/A 04 31 11.52 Gl 169.1A M4 10.82 12.11 +1.65 181.36 ± 3.67 +58 58 37.5 33226 265866 06 54 48.96 Wolf 294 M4 V 9.89 11.18 +1.57 181.32 ± 1.87 +33 16 05.4 53020 128620 10 50 52.06 Wolf 358 M5 V 11.64 12.89 +1.68 177.46 ± 23.00 +06 48 29.3 25878 36395 05 31 27.40 Wolf 1453 M1.5 V 7.97 9.19 +1.47 175.72 ± 1.20 −03 40 38.0 82817 152751 16 55 28.75 Wolf 630A M3 Ve 9.02 10.23 +1.55 174.23 ± 3.90 −08 20 10.8 96100 185144 19 32 21.59 σ Dra K0 V 4.67 5.87 +0.79 173.41 ± 0.46 +69 39 40.2 29295 42581 06 10 34.62 Gl 229 M1 Ve 8.15 9.34 +1.49 173.19 ± 1.12 −21 51 52.7 26857 N/A 05 42 09.27 Ross 47 M4 11.56 12.75 +1.62 172.78 ± 3.88 +12 29 21.6 86990 152751 17 46 34.23 Gl 693 M3.5 10.75 11.93 +1.66 172.08 ± 2.22 −57 19 08.6 94761 180617 19 16 55.26 Ross 652 M3.5 Ve 9.12 10.28 +1.46 170.26 ± 1.37 +05 10 08.1 73184 131977 14 57 28.00 Gl 570A K5 Ve 5.72 6.86 +1.02 169.32 ± 1.67 −21 24 55.7 37766 N/A 07 44 40.17 YZ CMi M4.5 Ve 11.19 12.32 +1.60 168.59 ± 2.67 +03 33 08.8 76074 155876 15 32 12.93 Gl 588 M3 9.31 10.44 +1.52 168.52 ± 1.42 −41 16 32.1 3821 4614 00 49 06.29 η Cas G3 V 3.46 4.59 +0.59 167.99 ± 0.62 +57 48 54.7 84478 156026 17 16 13.36 Gl 664 K5 Ve 6.33 7.45 +1.16 167.56 ± 1.06 −26 32 46.1 117473 156026 23 49 12.53 Gl 908 M2 Ve 8.98 10.10 +1.46 167.51 ± 1.49 +02 24 04.4 Sp.-V/AQuan/1999/10/11:10:50 Page 474 474 / 19 STAR POPULATIONS AND THE SOLAR NEIGHBORHOOD Table 19.1.
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