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.

Abstract Copyright: ∼

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

Simbad objects: 17

Full paper

View the references in ADS

Number of rows : 17

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Sp type	#ref 1850 - 2023	#notes
1	NGC 6139	GlC	16 27 39.987	-38 50 57.03	11.03	9.68	~	199	0
2	ESO 390-6	GlC	16 28 40.10	-35 21 13.0		12.0	~	89	0
3	NGC 6256	GlC	16 59 32.68	-37 07 17.1			~	140	0
4	NGC 6287	GlC	17 05 09.4906767360	-22 42 28.099250172	11.49	10.30	~	210	0
5	GCl 66.1	GlC	17 30 38.90	-31 35 44.0			~	108	0
6	ESO 455-11	GlC	17 31 05.20	-29 58 54.0			~	156	0
7	Ton 2	GlC	17 36 10.500	-38 33 12.00			~	83	0
8	NGC 6453	GlC	17 50 51.77	-34 35 55.1	10.49		~	154	0
9	GCl 80.1	GlC	18 01 38.80	-26 50 23.0			~	109	0
10	NGC 6517	GlC	18 01 50.376	-08 57 34.39	11.08		~	166	0
11	NGC 6522	GlC	18 03 34.08	-30 02 02.3			~	502	0
12	NGC 6540	GlC	18 06 08.60	-27 45 55.0			~	109	0
13	NGC 6553	GlC	18 09 15.68	-25 54 27.9	9.08		~	581	0
14	NGC 6558	GlC	18 10 17.6	-31 45 50			~	211	0
15	IC 1276	GlC	18 10 44.26	-07 12 27.3			~	112	0
16	ESO 522-1	GlC	18 12 15.80	-22 44 31.0		14.86	~	87	1
17	NGC 6717	GlC	18 55 06.04	-22 42 05.3			~	226	0

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