2MASS NIR photometry for 693 candidate globular clusters in M 31 and the Revised Bologna Catalogue
2MASS NIR photometry for 693 candidate globular clusters in M 31 and the Revised Bologna Catalogue
复制标题
DOI：
10.1051/0004-6361:20035632
复制
发表时间：
2003-12
影响因子：
6.5
通讯作者：
S. Galleti;S. Galleti;L. Federici;M. Bellazzini;F. F. Pecci-F.;S. Macrina
中科院分区：
文献类型：
--
作者：
S. Galleti;S. Galleti;L. Federici;M. Bellazzini;F. F. Pecci-F.;S. Macrina
我们已经在2MASS数据库中确定了693个已知的和候选的球状星团。将这些天体的2MASS J、H、K星等转换到现有的M31球状星团近红外测光的均匀测光系统中，最终得到了279个已确认的M31星团、406个未确认的候选星团和8个分类有争议的天体的J、H、K积分测光。在这些天体中，有529个缺乏先前对其近红外星等的估计。新组装的近红外数据集已被实施到修订版的博洛尼亚目录的M 31球状星团，更新的光学（UBVRI）测光，如果可能的话，从最新来源的CCD测光在文献中，并转化为一个共同的测光系统。最终的修订博洛尼亚星表（电子版）是目前已确认和候选的M 31球状星团的最全面的列表，共有1164个条目。特别是，它包括337个已确认的GC，688个GC候选者，10个有争议的分类对象，70个已确认的星系，55颗已确认的恒星和4个位于距离M31星系中心1.3公里范围内的H-1.5区域。使用新组装的数据库，我们表明，V-K颜色提供了一个强大的工具来区分M 31星系团和背景星系，我们确定了83个球状星团候选者的样本，这是不太可能被错误分类的星系污染。
We have identified in the 2MASS database 693 known and candidate globular clusters in M 31. The 2MASS J, H, K magnitudes of these objects have been transformed to the same homogeneous photometric system of existing near infrared photometry of M 31 globulars, finally yielding J, H, K integrated photometry for 279 confirmed M 31 clusters, 406 unconfirmed candidates and 8 objects with controversial classification. Of these objects 529 lacked any previous estimate of their near infrared magnitudes. The newly assembled near infrared dataset has been implemented into a revised version of the Bologna Catalogue of M 31 globulars, with updated optical (UBVRI) photometry taken, when possible, from the most recent sources of CCD photometry available in the literature and transformed to a common photometric system. The final Revised Bologna Catalogue (available in electronic form) is the most comprehensive list presently available of confirmed and candidate M 31 globular clusters, with a total of 1164 entries. In particular, it includes 337 confirmed GCs, 688 GC candidates, 10 objects with controversial classification, 70 confirmed galaxies, 55 confirmed stars, and 4 H regions lying within ∼3 ◦ from the center of the M 31 galaxy. Using the newly assembled database we show that the V − K color provides a powerful tool to discriminate between M 31 clusters and background galaxies, and we identify a sample of 83 globular cluster candidates, which is not likely to be contaminated by misclassified galaxies.