1999A&AS..138..267O

Query : 1999A&AS..138..267O

1999A&AS..138..267O - Astron. Astrophys., Suppl. Ser., 138, 267-273 (1999/August-0)

Blue horizontal branch globular clusters towards the bulge: Terzan 9, NGC 6139 and NGC 6453.

ORTOLANI S., BICA E. and BARBUY B.

Abstract (from CDS):

We present V and I photometry of the globular clusters Terzan 9 and NGC 6453 for the first time, and also of NGC 6139. The three clusters are projected towards the bulge. The Colour-Magnitude Diagram morphologies reveal that the sample clusters have blue horizontal branches. This characterizes an important fraction of the clusters projected on the bulge, with implications on the early Galaxy history. From the colour-magnitude diagrams we derive reddenings of E(B-V)=1.95, 0.77, 0.70 and distances d☉≃4.9, 9.4, 8.5 kpc respectively for Terzan 9, NGC 6139 and NGC 6453. We conclude that these metal-poor clusters are within the bulge volume.

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Journal keyword(s): globular clusters: individual: Terzan 9, NGC 6139, NGC 6453 - HR diagram - stars: horizontal branch

Simbad objects: 17

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Number of rows : 17
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 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 231 0
2 ESO 390-6 GlC 16 28 40.10 -35 21 13.0     12.0     ~ 113 0
3 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 182 0
4 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 240 0
5 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 139 0
6 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 208 0
7 NAME Tonantzintla 2 GlC 17 36 10.500 -38 33 12.00           ~ 115 0
8 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 189 0
9 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 143 0
10 NGC 6517 GlC 18 01 50.376 -08 57 34.39   11.08       ~ 215 0
11 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
12 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 145 0
13 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
14 NGC 6558 GlC 18 10 17.6 -31 45 50           ~ 265 0
15 IC 1276 GlC 18 10 44.26 -07 12 27.3           ~ 146 0
16 ESO 522-1 GlC 18 12 15.80 -22 44 31.0     14.86     ~ 114 1
17 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0

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