2010MNRAS.401..621T

Query : 2010MNRAS.401..621T

2010MNRAS.401..621T - Mon. Not. R. Astron. Soc., 401, 621-632 (2010/January-1)

UBV(RI)C photometry of the open clusters Be 15, Be 80 and NGC 2192.

TAPIA M.T., SCHUSTER W.J., MICHEL R., CHAVARRIA-K. C., DIAS W.S., VAZQUEZ R. and MOITINHO A.

Abstract (from CDS):

The three open clusters Be 15, Be 80 and NGC 2192 have been observed using CCD UBV(RI)C photometry at the San Pedro Mártir Observatory, México within the framework of our open-cluster survey. The fundamental parameters of interstellar reddening, distance and age have been derived, and also the metallicity for NGC 2192 (solar metallicity has been assumed for the other two). By shifting the colours of Schmidt-Kaler in the (U - B,B - V) two-colour diagram along the appropriate reddening vector, the interstellar reddenings have been derived as E(B - V) = 0.23±0.03 mag for Be 15, 1.31±0.05 for Be 80, and 0.16 ±0.03 for NGC 2192. Evidence is shown for a variable interstellar extinction across the cluster Be 80. For NGC 2192, a nicely consistent fit is obtained for both the interstellar reddening and the metallicity ([Fe/H] = -0.31) using simultaneously the F-type and red-clump stars.

By fitting isochrones to the observed sequences of these three clusters in various colour-magnitude diagrams of different colour indices (B - V,V - I or V - R), the averages of distance moduli and heliocentric distances [(V - MV)o(mag); d(pc)] are the following: (10.74 ±0.01; 1202) for Be 15, (10.75±0.01; 1413) for Be 80 and (12.7±0.01; 3467) for NGC 2192, and the averages of the inferred best ages [log(age); age(Gyr)] are (8.6±0.05; 0.4) for Be 80 and (9.15±0.05; 1.4) for NGC 2192; for Be 15 there are two distinct possibilities for the age fit, depending on the membership of three brighter stars (9.35 or 9.95±0.05; 2.2 or 8.9). The need for spectroscopic observations in Be 15 is emphasized to select between alternate reddening and age solutions, and for deeper UBV observations in Be 80 to study in greater detail the variable interstellar, or intracluster, reddening across this cluster.


Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): stars: distances - stars: fundamental parameters - Hertzspring-Russell (HR) diagrams - open clusters and associations: individual: Be 15 - open clusters and associations: individual: Be 80 - open clusters and associations: individual: NGC 2192

VizieR on-line data: <Available at CDS (J/MNRAS/401/621): table1.dat table2.dat table3.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: In Chap. 5.1 : Star 1 = USNO-B1.0 0887-00406525, Star 2 : USNO-B1.0 0887-00406255

Simbad objects: 20

goto Full paper

goto View the references in ADS

Number of rows : 20
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 SA 95- reg 03 53 21.0 -00 01 10           ~ 85 0
2 Cl Berkeley 15 OpC 05 02 03.5 +44 30 04           ~ 36 0
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
4 NGC 2192 OpC 06 15 16.5 +39 50 39     10.9     ~ 52 0
5 PG 0918+029 HS* 09 21 28.2138172968 +02 46 02.254084824 11.975 13.056 13.327 13.456 13.615 sdB1VIIHe6 118 0
6 PG 0942-029 HS* 09 45 11.8538082624 -03 09 21.034933164 12.537 13.714 14.012 14.144 14.308 sdB 57 0
7 V* UY Sex HS* 10 50 02.8265487864 -00 00 36.879009588 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 175 0
8 SA 104- reg 12 42 21.0 -00 32 29           ~ 58 0
9 PG 1323-086 HS* 13 25 39.4669501176 -08 49 19.067387484 12.660 13.341 13.481 13.529 13.608 sdB3IHe8 144 1
10 PG 1525-071 HS* 15 28 11.5771773672 -07 16 32.899212840 13.658 14.85 14.89 15.14 15.197 sdO 42 0
11 PG 1528+062 HS* 15 30 49.9257266448 +06 00 56.275796952 13.424 14.515 14.767 14.878 15.063 sdOB 38 0
12 PG 1530+057 HS* 15 33 10.7388809784 +05 32 26.849612508 13.573 14.362 14.211 14.049 14.012 sdB 20 0
13 SA 107- reg 15 39.2 -00 20           ~ 91 0
14 PG 1633+099 HS* 16 35 24.0241690848 +09 47 49.891209036 13.215 14.205 14.396 14.481 14.609 sdB 113 0
15 PG 1657+078 HS* 16 59 32.2150744512 +07 43 31.412466912 13.919 14.877 15.019 15.098 15.115 sdB 56 0
16 USNO-B1.0 0887-00406255 * 18 54 16.9482179040 -01 12 34.748713764   13.9   12.9   ~ 1 0
17 2MASS J18542067-0113134 * 18 54 20.6647058112 -01 13 13.610577756   14.2   12.0   ~ 1 0
18 Cl Berkeley 80 OpC 18 54 21.6 -01 12 52           ~ 31 0
19 IRAS 18518-0117 Mi* 18 54 24.0732306264 -01 13 48.064429920         12.767 O-rich 7 0
20 [L92b] Mark A HS* 20 43 59.2253596272 -10 47 41.696051820 11.854 13.010 13.256 13.370 13.494 sdO 75 1

To bookmark this query, right click on this link: simbad:objects in 2010MNRAS.401..621T and select 'bookmark this link' or equivalent in the popup menu