Pismis 2: a poorly studied, intermediate-age open cluster

被引：7

作者：

Di Fabrizio, L

Bragaglia, A

Tosi, M

Marconi, G

机构：

[1] Osservatorio Astron Bologna, I-40127 Bologna, Italy

[2] Osserv Astron Roma, I-00040 Monte Porzio Catone, Italy

[3] ESO, Santiago, Chile

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2001年 / 328卷 / 03期

关键词：

Hertzsprung-Russell (HR) diagram; open clusters and associations : general; open clusters and associations : individual : Pismis 2;

D O I：

10.1046/j.1365-8711.2001.04900.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present CCD BVI photometry of the intermediate-age open cluster Pismis 2, covering from the brighter red giants to about 5 mag below the main-sequence turn-off. The cluster is heavily reddened and is possibly affected by a differential reddening of DeltaE(B - V) similar or equal to 0.04-0.06. Using the synthetic colour-magnitude diagram method, we estimate the distance modulus, (m - M)(0) similar or equal to 12.5-12.7, and age, tau similar or equal to 1. 1-1.2 Gyr, in a self-consistent way. The cluster probably contains a significant fraction of binary systems. The metallicity is most likely solar and the reddening E(B - V) ranges between 1.26 and 1.32 depending on the cluster region.

引用

页码：795 / 804

页数：10

共 26 条

[1]

[Anonymous], 1959, B OBSERVATORIOS TONA

[2]

Bessell MS, 1998, ASTRON ASTROPHYS, V337, P321

[3]

Bragaglia A, 2000, ASTROPHYS SPACE SC L, V255, P281

[4] Metal abundances of red clump stars in open clusters.: I.: NGC 68191 [J].

Bragaglia, A ;

Carretta, E ;

Gratton, RG ;

Tosi, M ;

Bonanno, G ;

Bruno, P ;

Calì, A ;

Claudi, R ;

Cosentino, R ;

Desidera, S ;

Farisato, G ;

Rebeschini, M ;

Scuderi, S .

ASTRONOMICAL JOURNAL, 2001, 121 (01) :327-336

[5] UBVRI CCD photometry of the old open cluster NGC 6253 [J].

Bragaglia, A ;

Tessicini, G ;

Tosi, M ;

Marconi, G ;

Munari, U .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 284 (02) :477-488

[6]

BRESSAN A, 1993, ASTRON ASTROPHYS SUP, V100, P647

[7]

Carretta E, 2000, ASTR SOC P, V198, P273

[8]

Davis L. E., 1994, REFERENCE GUIDE IRAF

[9] REDDENINGS OF CEPHEIDS USING BVI PHOTOMETRY [J].

DEAN, JF ;

WARREN, PR ;

COUSINS, AWJ .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1978, 183 (03) :569-583

[10] Intermediate-mass stars: Updated models [J].

Dominguez, I ;

Chieffi, A ;

Limongi, M ;

Straniero, O .

ASTROPHYSICAL JOURNAL, 1999, 524 (01) :226-241

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