A Multi-band Catalog of 10978 Star Clusters, Associations, and Candidates in the Milky Way

Abstract

We present a catalog of Galactic star clusters, associations and candidates with 10978 entries. This multi-band catalog was constructed over 20 years, starting with visual inspections on the Digital Sky Survey and incremented with the 2MASS, WISE, VVV, Spitzer and Herschel surveys. Large and small catalogs, as well as papers on individual objects have been systematically cross-identified. The catalog provides Galactic and equatorial coordinates, angular diameters, and chronologically ordered designations, making it simple to assign discoveries, and verify how often the objects were cataloged by different authors, search methods and/or surveys. Detection in a single band is the minimum constraint to validate an entry. About 3200 objects have measured parameters in the literature. A fundamental contribution of the present study is to present additional ≈ 7700 objects for first analyses of nature, photometry, spectroscopy and structure. The present focus is not to compile or determine fundamental parameters, but to provide a catalog characterizing uniformly the entries. A major result is that now 4060 embedded clusters are catologed, a factor of ≈ 2 larger than open clusters. Besides cross-identifications in different references and wavelength domains, we also communicate the discovery of 638 star clusters and alike objects. The present general catalog provides previously studied objects and thousands of additional entries in a homogeneous way, a timely contribution to Gaia related works.

Small-scale star formation as revealed by VVVX galactic cluster candidates

“…During our visual inspection of VVVX image we did not recover 90 embedded cluster candidates listed in Bica at al. (2019), and confirmed 71 of them on the base of their appearance on the high quality VVVX images.…”

“…(2019), and confirmed 71 of them on the base of their appearance on the high quality VVVX images. Photometric analysis of 15 clusters from Bica at al. (2019) catalog shows that they have ages above 20 Myr, masses below 2000 M and in general follow the motion of the disk, according to their proper motion distribution.…”

“…Sections 3 and 4 detail the candidate detection methods and validation. Section 5 summarizes our review of known clusters in the search area, reported by Bica at al. (2019).…”

OB stars and YSO populations in the region of NGC 6334–NGC 6357 as seen withGaiaDR2

“…Figure 8b shows the 15 resultant groups (with more than 30 stars) which have been extracted and they are listed in Table 4. Some of these groups were already identified and classified as embedded clusters or embedded groups by Bica et al (2019). Group 7 is clearly related to GM1-24.…”

Investigation of Open Star Clusters Alessi 98 and Ryu 762

“…Alessi 98 упоминается в каталоге [1] как астеризм, однако, по данным каталога Gaia DR2, в данной области четко видно сгущение звезд, которое также проявляет характерную для скопления общность движения на диаграмме собственных движений. Скопление Ryu 762 ранее было обнаружено как сгущение звезд по данным глубоких инфракрасных обзоров [2], однако теперь этот объект виден и в оптическом диапазоне, что позволило более глубоко изучить его свойства.…”