Table 2
A list of stellar age t, photometric mass Mphot, and effective radius reff of young, massive (see Table 1; text) stellar associations observed in the Milky Way Galaxy, the Local Group of galaxies, and other external galaxies.
| Galaxy name | Cluster name | Age t (Myr) | log 10(Mphot/M⊙) | reff (pc) |
|
|
||||
| Milky Way | CYgOB | 2.5 | 4.40 | 5.20 |
| Milky Way | IC 1805 | 2.00 | 4.20 | 12.50 |
| Milky Way | ILac1 | 14.00 | 3.40 | 20.70 |
| Milky Way | LowerCenCrux | 11.50 | 3.30 | 15.00 |
| Milky Way | NGC 2244 | 2.00 | 3.90 | 5.60 |
| Milky Way | NGC 6611 | 3.00 | 4.40 | 5.90 |
| Milky Way | NGC 7380 | 2.00 | 3.80 | 6.50 |
| Milky Way | ONC | 1.00 | 3.65 | 2.00 |
| Milky Way | OriIa | 11.40 | 3.70 | 16.60 |
| Milky Way | OriIb | 1.70 | 3.60 | 6.30 |
| Milky Way | OriIc | 4.60 | 3.80 | 12.50 |
| Milky Way | UpperCenCrux | 14.50 | 3.60 | 22.10 |
| Milky Way | USco | 5.50 | 3.50 | 14.20 |
|
|
||||
| M31 | KW 249 | 5.0 | 4.30 | 13.50 |
| M31 | KW 258 | 5.0 | 4.05 | 3.40 |
| M33 | NGC 595 | 4.0 | 4.50 | 26.90 |
| M33 | NGC 604 | 3.5 | 5.00 | 28.40 |
| SMC | NGC 346 | 3.0 | 5.60 | 9.00 |
|
|
||||
| NGC 2403 | I-B | 6.03 | 4.82 | 26.30 |
| NGC 2403 | I-C | 6.03 | 4.42 | 19.60 |
| NGC 2403 | I-A | 6.03 | 5.06 | 20.60 |
| NGC 2403 | II | 4.47 | 5.35 | 11.80 |
| NGC 2403 | IV | 4.47 | 5.07 | 30.00 |
| NGC 4214 | VI | 10.96 | 4.93 | 35.90 |
| NGC 4214 | V | 10.96 | 5.73 | 83.90 |
| NGC 4214 | VII | 10.96 | 5.33 | 40.40 |
| NGC 4214 | I-A | 3.47 | 5.44 | 16.50 |
| NGC 4214 | I-B | 3.47 | 5.40 | 33.00 |
| NGC 4214 | I-D | 8.91 | 5.30 | 15.30 |
| NGC 4214 | II-C | 2.00 | 4.86 | 21.70 |
| NGC 5253 | IV | 3.47 | 4.72 | 13.80 |
Notes. This list is compiled from Portegies Zwart et al. (2010; see their Tables 2−4) where the references for the data of the individual clusters are given. All these stellar systems are ≲ 5 times younger than their present dynamical crossing time, τcr (i.e. they are dynamically young), which implies that they may or may not be gravitationally bound objects.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.