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Re: Chandler's Astrophysics

Charles, do you have interest in trying to understand and explain Star Clusters? There are open clusters and globular clusters. I think the open clusters tend to be in the galactic disk, while the globular clusters tend to be above and below the disk in the galactic halo. You mentioned in one of your quasar discussions (which I copied to the Comments under your Tokamaks paper in the Comment titled Quasars, Part 2) that stars may cluster around quasars and form clusters. Do you think those would tend to be open clusters or globular clusters? Since quasars tend to follow the minor axes of galaxies, it looks like the quasar-centered star clusters would likely appear mainly in the galactic halo. You speculated that individual quasars might tend to fall back to the galactic center, but then keep going indefinitely once past the center. Are quasars found far from any galaxies? My impression is that they tend to remain nearby their parent galaxies. I'm wondering if quasars may form globular clusers in galactic halos and then move back into the disk or the bulge, or keep going away from the galaxy.

Have you thought much about this?

Here's a map of the Milky Way globular clusters, which appear to show them mostly close to the galactic bulge: http://www.atlasoftheuniverse.com/globular.gif

The map is at the bottom of this webpage: http://www.atlasoftheuniverse.com/globular.html

Above the map is a list of the locations of the globular clusters and above that some photos.

Here's the List:


Catalog | Equatorial | Galactic | Visual|Angular|Distance|Con
Number | Coordinates | Coordinates| Mag. | Diam. | (kly) |
_________|__RA______Dec__|___l°____b°_|_______|__(')__|________|___
NGC 0104 00 24.1 -72 05 305.9 -44.9 03.95 50' 15 Tuc
NGC 0288 00 52.8 -26 35 152.3 -89.4 08.09 13' 29 Scl
NGC 0362 01 03.2 -70 51 301.5 -46.3 06.40 14' 28 Tuc
NGC 1261 03 12.3 -55 13 270.5 -52.1 08.29 07' 53 Hor
Pal 0001 03 33.4 +79 35 130.1 +19.0 13.18 01' 36 Cep
AM 00001 03 55.0 -49 37 258.4 -48.5 15.72 01' 398 Hor
Eridanus 04 24.7 -21 11 218.1 -41.3 14.70 01' 294 Eri
Pal 0002 04 46.1 +31 23 170.5 -09.1 13.04 02' 90 Aur
NGC 1851 05 14.1 -40 03 244.5 -35.0 07.14 12' 39 Col
NGC 1904 05 24.2 -24 31 227.2 -29.4 07.73 10' 42 Lep
NGC 2298 06 49.0 -36 00 245.6 -16.0 09.29 05' 35 Pup
NGC 2419 07 38.1 +38 53 180.4 +25.2 10.39 05' 275 Lyn
Pyxis------ 09 08.0 -37 13 261.3 +07.0 12.90 03' 129 Pyx
NGC 2808 09 12.0 -64 52 282.2 -11.3 06.20 14' 31 Car
E 3-------- 09 21.0 -77 17 292.3 -19.0 11.35 05' 14 Cha
Pal 3------ 10 05.5 +00 04 240.1 +41.9 14.26 02' 302 Sex
NGC 3201 10 17.6 -46 25 277.2 +08.6 06.75 20' 16 Vel
Willman1 10 49.4 +51 03 158.6 +56.8 15.0? 07' 147 UMa
Pal 4------ 11 29.3 +28 58 202.3 +71.8 14.20 02' 356 UMa
NGC 4147 12 10.1 +18 33 252.9 +77.2 10.32 04' 63 Com
NGC 4372 12 25.8 -72 40 301.0 -09.9 07.24 05' 19 Mus
Rup 0106 12 38.7 -51 09 300.9 +11.7 10.90 05' 69 Cen
NGC 4590 12 39.5 -26 45 299.6 +36.1 07.84 11' 33 Hya
NGC 4833 12 59.6 -70 52 303.6 -08.0 06.91 14' 21 Mus
NGC 5024 13 12.9 +18 10 333.0 +79.8 07.61 13' 58 Com
NGC 5053 13 16.5 +17 42 335.7 +78.9 09.47 10' 53 Com
NGC 5139 13 26.8 -47 29 309.1 +15.0 03.68 55' 17 Cen
NGC 5272 13 42.2 +28 23 042.2 +78.7 06.19 18' 34 CVn
NGC 5286 13 46.4 -51 22 311.6 +10.6 07.34 11' 36 Cen
AM 4------- 13 56.4 -27 10 320.3 +33.5 15.90 01' 98 Hya
NGC 5466 14 05.5 +28 32 042.2 +73.6 09.04 09' 52 Boo
NGC 5634 14 29.6 -05 59 342.2 +49.3 09.47 06' 82 Vir
NGC 5694 14 39.6 -26 32 331.1 +30.4 10.17 04' 113 Hya
IC 4499-- 15 00.3 -82 13 307.4 -20.5 09.76 08' 62 Aps
NGC 5824 15 04.0 -33 04 332.6 +22.1 09.09 07' 104 Lup
Pal 5--- 15 16.1 -00 07 000.9 +45.9 11.75 05' 76 Ser
NGC 5897 15 17.5 -21 01 343.0 +30.3 08.53 11' 40 Lib
NGC 5904 15 18.6 +02 05 003.9 +46.8 05.65 23' 24 Ser
NGC 5927 15 28.0 -50 40 326.6 +04.9 08.01 06' 25 Lup
NGC 5946 15 35.5 -50 40 327.6 +04.2 09.61 03' 35 Nor
BH 176---- 15 39.1 -50 03 328.4 +04.3 14.00 04' 51 Nor
NGC 5986 15 46.1 -37 47 337.0 +13.3 07.52 10' 34 Lup
Lynga 7-- 16 11.1 -55 19 328.8 -02.8 00.00 03' 23 Nor
Pal 14---- 16 11.1 +14 57 028.8 +42.2 14.74 02' 241 Ser
NGC 6093 16 17.0 -22 59 352.7 +19.5 07.33 10' 33 Sco
NGC 6121 16 23.6 -26 32 351.0 +16.0 05.63 36' 07 Sco
NGC 6101 16 25.8 -72 12 317.8 -15.8 09.16 05' 50 Aps
NGC 6144 16 27.2 -26 01 351.9 +15.7 09.01 07' 28 Sco
NGC 6139 16 27.7 -38 51 342.4 +06.9 08.99 08' 33 Sco
Terzan 3 16 28.7 -35 21 345.1 +09.2 12.00 04' 24 Sco
NGC 6171 16 32.5 -13 03 003.4 +23.0 07.93 13' 21 Oph
1636-283 16 39.4 -28 24 351.9 +12.1 12.00 03' 25 Sco
NGC 6205 16 41.7 +36 28 059.0 +40.9 05.78 20' 25 Her
NGC 6229 16 47.0 +47 32 073.6 +40.3 09.39 05' 99 Her
NGC 6218 16 47.2 -01 57 015.7 +26.3 06.70 16' 16 Oph
NGC 6235 16 53.4 -22 11 358.9 +13.5 09.97 05' 37 Oph
NGC 6254 16 57.1 -04 06 015.1 +23.1 06.60 20' 14 Oph
NGC 6256 16 59.5 -37 07 347.8 +03.3 11.29 04' 27 Sco
Pal 15---- 17 00.0 +00 33 018.9 +24.3 14.00 03' 145 Oph
NGC 6266 17 01.2 -30 07 353.6 +07.3 06.45 15' 23 Oph
NGC 6273 17 02.6 -26 16 356.9 +09.4 06.77 17' 28 Oph
NGC 6284 17 04.5 -24 46 358.4 +09.9 08.83 06' 50 Oph
NGC 6287 17 05.2 -22 42 000.1 +11.0 09.35 05' 30 Oph
NGC 6293 17 10.2 -26 35 357.6 +07.8 08.22 08' 29 Oph
NGC 6304 17 14.5 -29 28 355.8 +05.4 08.22 08' 20 Oph
NGC 6316 17 16.6 -28 08 357.2 +05.8 08.43 05' 36 Oph
NGC 6341 17 17.1 +43 08 068.3 +34.9 06.44 14' 27 Her
NGC 6325 17 18.0 -23 46 001.0 +08.0 10.33 04' 26 Oph
NGC 6333 17 19.2 -18 31 005.5 +10.7 07.72 12' 26 Oph
NGC 6342 17 21.2 -19 35 004.9 +09.7 09.66 04' 28 Oph
NGC 6356 17 23.6 -17 49 006.7 +10.2 08.25 10' 50 Oph
NGC 6355 17 24.0 -26 21 359.6 +05.4 09.14 04' 31 Oph
NGC 6352 17 25.5 -48 25 341.4 -07.2 07.96 09' 19 Ara
IC 1257-- 17 27.1 -07 06 016.5 +15.2 13.10 05' 82 Oph
Terzan 2 17 27.6 -30 48 356.3 +02.3 14.29 02' 28 Sco
NGC 6366 17 27.7 -05 05 018.4 +16.0 09.20 13' 12 Oph
Terzan 4 17 30.6 -31 36 356.0 +01.3 16.00 02' 30 Sco
HP 1------- 17 31.1 -29 59 357.4 +02.1 11.59 03' 46 Oph
NGC 6362 17 31.9 -67 03 325.6 -17.6 07.73 15' 25 Ara
Liller 1 17 33.4 -33 23 354.8 -00.2 16.77 01' 31 Sco
NGC 6380 17 34.5 -39 04 350.2 -03.4 11.31 04' 35 Sco
Terzan 1 17 35.8 -30 29 357.6 +01.0 15.90 02' 18 Sco
Ton 2------ 17 36.2 -38 33 350.8 -03.4 12.24 03' 26 Sco
NGC 6388 17 36.3 -44 44 345.6 -06.7 06.72 10' 33 Sco
NGC 6402 17 37.6 -03 15 021.3 +14.8 07.59 11' 30 Oph
NGC 6401 17 38.6 -23 55 003.5 +04.0 09.45 05' 34 Oph
NGC 6397 17 40.7 -53 40 338.2 -12.0 05.73 31' 08 Ara
Pal 6------ 17 43.7 -26 13 002.1 +01.8 11.55 02' 19 Sgr
NGC 6426 17 44.9 +03 10 028.1 +16.2 11.01 04' 68 Oph
Djorg 1-- 17 47.5 -33 04 356.7 -02.5 13.60 02' 39 Sco
Terzan 5 17 48.1 -24 47 003.8 +01.7 13.85 02' 34 Sgr
NGC 6440 17 48.9 -20 22 007.7 +03.8 09.20 04' 27 Sgr
NGC 6441 17 50.2 -37 03 353.5 -05.0 07.15 10' 38 Sco
Terzan 6 17 50.8 -31 17 358.6 -02.2 13.85 01' 31 Sco
NGC 6453 17 50.9 -34 36 355.7 -03.9 10.08 08' 31 Sco
UKS 1------ 17 54.5 -24 09 005.1 +00.8 17.29 02' 27 Sgr
NGC 6496 17 59.0 -44 16 348.0 -10.0 08.54 06' 38 Sco
Terzan 9 18 01.6 -26 50 003.6 -02.0 16.00 02' 21 Sgr
Djorg 2-- 18 01.8 -27 50 002.8 -02.5 09.90 02' 22 Sgr
NGC 6517 18 01.8 -08 58 019.2 +06.8 10.23 04' 35 Oph
Terzan10 18 03.0 -26 04 004.4 -01.9 14.90 01' 19 Sgr
NGC 6522 18 03.6 -30 02 001.0 -03.9 08.27 09' 25 Sgr
NGC 6535 18 03.8 +00 18 027.2 +10.4 10.47 03' 22 Oph
NGC 6528 18 04.8 -30 03 001.1 -04.2 09.60 05' 26 Sgr
NGC 6539 18 04.8 -07 35 020.8 +06.8 09.33 08' 27 Oph
NGC 6540 18 06.1 -27 46 003.3 -03.3 09.30 02' 12 Sgr
NGC 6544 18 07.3 -25 00 005.8 -02.2 07.77 09' 09 Sgr
NGC 6541 18 08.0 -43 30 349.5 -11.1 06.30 15' 23 CrA
2MS-GC01 18 08.4 -19 50 010.5 +0.1 00.00 00' 12 Sgr
ESO-SC06 18 09.1 -46 25 346.9 -12.6 00.00 01' 71 Tel
NGC 6553 18 09.3 -25 55 005.3 -03.0 08.06 09' 20 Sgr
2MS-GC02 18 09.6 -20 47 009.8 -00.6 00.00 00' 13 Sgr
NGC 6558 18 10.3 -31 46 000.2 -06.0 09.26 04' 24 Sgr
IC 1276-- 18 10.7 -07 12 021.8 +05.7 10.34 08' 18 Ser
Terzan12 18 12.3 -22 45 008.4 -02.1 15.63 01' 16 Sgr
NGC 6569 18 13.6 -31 50 000.5 -06.7 08.55 06' 35 Sgr
NGC 6584 18 18.6 -52 13 342.1 -16.4 08.27 07' 44 Tel
NGC 6624 18 23.7 -30 22 002.8 -07.9 07.87 09' 26 Sgr
NGC 6626 18 24.5 -24 52 007.8 -05.6 06.79 14' 18 Sgr
NGC 6638 18 30.9 -25 30 007.9 -07.2 09.02 07' 31 Sgr
NGC 6637 18 31.4 -32 21 001.7 -10.3 07.64 07' 30 Sgr
NGC 6642 18 31.9 -23 29 009.8 -06.4 09.13 06' 27 Sgr
NGC 6652 18 35.8 -32 59 001.5 -11.4 08.62 06' 33 Sgr
NGC 6656 18 36.4 -23 54 009.9 -07.6 05.10 32' 10 Sgr
Pal 8------ 18 41.5 -19 50 014.1 -06.8 11.02 02' 42 Sgr
NGC 6681 18 43.2 -32 18 002.9 -12.5 07.87 08' 29 Sgr
NGC 6712 18 53.1 -08 42 025.4 -04.3 08.10 10' 23 Sct
NGC 6715 18 55.1 -30 29 005.6 -14.1 07.60 12' 87 Sgr
NGC 6717 18 55.1 -22 42 012.9 -10.9 09.28 05' 23 Sgr
NGC 6723 18 59.6 -36 38 000.1 -17.3 07.01 13' 28 Sgr
NGC 6749 19 05.3 +01 54 036.2 -02.2 12.44 04' 26 Aql
NGC 6752 19 10.9 -59 59 336.5 -25.6 05.40 29' 13 Pav
NGC 6760 19 11.2 +01 02 036.1 -03.9 08.88 10' 24 Aql
NGC 6779 19 16.6 +30 11 062.7 +08.3 08.27 09' 33 Lyr
Terzan 7 19 17.7 -34 39 003.4 -20.1 12.00 03' 76 Sgr
Pal 10---- 19 18.0 +18 34 052.4 +02.7 13.22 03' 19 Sge
Arp 2------ 19 28.7 -30 21 008.6 -20.8 12.30 04' 93 Sgr
NGC 6809 19 40.0 -30 58 008.8 -23.3 06.32 19' 17 Sgr
Terzan 8 19 41.8 -34 00 005.8 -24.6 12.40 05' 85 Sgr
Pal 11---- 19 45.2 -08 00 031.8 -15.6 09.80 03' 42 Aql
NGC 6838 19 53.8 +18 47 056.7 -04.6 08.19 07' 13 Sge
NGC 6864 20 06.1 -21 55 020.3 -25.8 08.52 07' 68 Sgr
NGC 6934 20 34.2 +07 24 052.1 -18.9 08.83 07' 51 Del
NGC 6981 20 53.5 -12 32 035.2 -32.7 09.27 07' 55 Aqr
NGC 7006 21 01.5 +16 11 063.8 -19.4 10.56 04' 135 Del
NGC 7078 21 30.0 +12 10 065.0 -27.3 06.20 18' 34 Peg
NGC 7089 21 33.5 +00 49 053.4 -35.8 06.47 16' 38 Aqr
NGC 7099 21 40.4 -23 11 027.2 -46.8 07.19 12' 26 Cap
Pal 12---- 21 46.6 -21 15 030.5 -47.7 11.99 02' 62 Cap
Pal 13---- 23 06.7 +12 46 087.1 -42.7 13.47 01' 84 Peg
NGC 7492 23 08.4 -15 37 053.4 -63.5 11.29 04' 84 Aqr


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