1999A&A...351..519M

Query : 1999A&A...351..519M

1999A&A...351..519M - Astronomy and Astrophysics, volume 351519-525 (1999/11-2)

Blue horizontal branch stars in metal-rich globular clusters. I. NGC 6388 and NGC 6441.

MOEHLER S., SWEIGART A.V. and CATELAN M.

Abstract (from CDS):

We report the first results of an ongoing spectroscopic survey of blue horizontal branch stars in the metal-rich ([Fe/H]≃-0.5) globular clusters NGC 6388 and NGC 6441. Based on data obtained with the ESO-New Technology Telescope (NTT), we provide gravities and temperatures for four stars in NGC 6388 and three stars in NGC 6441. These results are marginally inconsistent with the predictions of canonical evolutionary theory, but disagree strongly with all non-canonical scenarios that explain the sloped horizontal branches seen in the colour-magnitude diagrams of these clusters.

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Journal keyword(s): stars: early-type - stars: fundamental parameters - stars: horizontal-branch - Galaxy: globular clusters: individual: NGC 6388 - Galaxy: globular clusters: individual: NGC 6441

Nomenclature: Table 1: Cl* NGC 6388 WF N-NN N=4, Cl* NGC 6441 WF N-NN N=3.

Simbad objects: 12

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Number of rows : 12
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 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
2 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
3 Cl* NGC 6388 WF 4-20 * 17 36 20.9 -44 45 10   17.524 17.183     ~ 1 0
4 Cl* NGC 6388 WF 2-42 * 17 36 21.842 -44 42 55.70   17.77 17.410     ~ 3 0
5 Cl* NGC 6388 WF 3-14 * 17 36 23.5 -44 43 11   17.247 16.914     ~ 1 0
6 Cl* NGC 6388 WF 3-15 * 17 36 24.1 -44 43 15   17.328 16.896     ~ 1 0
7 Cl* NGC 6441 WF 3-17 * 17 50 04.5 -37 02 20   18.142 17.643     ~ 1 0
8 Cl* NGC 6441 WF 3-16 * 17 50 06.2 -37 02 50   18.241 17.683     ~ 1 0
9 Cl* NGC 6441 WF 2-24 * 17 50 08.5 -37 04 09   17.951 17.565     ~ 1 0
10 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
11 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
12 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 267 0

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