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| Query : 1999A&A...343..904C |
1999A&A...343..904C - Astronomy and Astrophysics, volume 343904-908 (1999/3-3)
On the gap in horizontal branches at B-V about zero.
CALOI V.
Abstract (from CDS):
It is proposed that the gap observed in the horizontal branch sequence of many globular clusters at B-V about zero is due to a surface phenomenon. Stars on the hotter side of the gap - Teff>10000K - have an atmospheric chemical composition altered as in peculiar A and B stars. The appearance of a convective regime in the surface layers at the temperature and gravity of the gap cancel the peculiarities: it is proposed that the ensuing changes in surface physical conditions give origin to the observed gap.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: globular clusters: general - stars: horizontal-branch - stars: chemically peculiar
Simbad objects: 16
| Number of rows : 16 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NGC 288 | GlC | 00 52 45.24 | -26 34 57.4 | 10 | 8.13 | ~ | 1130 | 0 | |||
| 2 | NGC 1851 | GlC | 05 14 06.76 | -40 02 47.6 | ~ | 1529 | 0 | |||||
| 3 | M 79 | GlC | 05 24 10.59 | -24 31 27.3 | 8.16 | ~ | 883 | 0 | ||||
| 4 | M 68 | GlC | 12 39 27.98 | -26 44 38.6 | 7.96 | ~ | 1069 | 0 | ||||
| 5 | NGC 5053 | GlC | 13 16 27.09 | +17 42 00.9 | 9.96 | ~ | 675 | 0 | ||||
| 6 | BD+30 2431 | HB* | 13 38 24.7651989120 | +29 21 56.007255024 | 9.89 | 10.02 | B5Vp | 127 | 0 | |||
| 7 | NGC 5897 | GlC | 15 17 24.40 | -21 00 36.4 | 10.16 | 8.52 | ~ | 424 | 0 | |||
| 8 | M 5 | GlC | 15 18 33.22 | +02 04 51.7 | 5.95 | ~ | 2095 | 0 | ||||
| 9 | M 13 | GlC | 16 41 41.634 | +36 27 40.75 | 5.8 | ~ | 2291 | 0 | ||||
| 10 | M 92 | GlC | 17 17 07.39 | +43 08 09.4 | 6.52 | ~ | 2240 | 0 | ||||
| 11 | NGC 6397 | GlC | 17 40 42.09 | -53 40 27.6 | 5.17 | ~ | 2103 | 0 | ||||
| 12 | V* V686 CrA | a2* | 18 56 40.4859327624 | -37 20 35.701261512 | 4.53 | 5.24 | 5.38 | B3V | 214 | 0 | ||
| 13 | NGC 6752 | GlC | 19 10 52.11 | -59 59 04.4 | ~ | 2121 | 0 | |||||
| 14 | Cl Terzan 8 | GlC | 19 41 44.41 | -33 59 58.1 | 11.54 | ~ | 357 | 0 | ||||
| 15 | M 15 | GlC | 21 29 58.33 | +12 10 01.2 | ~ | 3274 | 0 | |||||
| 16 | M 30 | GlC | 21 40 22.12 | -23 10 47.5 | 7.10 | ~ | 1121 | 0 |
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