Galactic Parameters from Whole Sky 2MASS Star Count
| dc.creator | Chang, C. K. | |
| dc.creator | Ko, C. M. | |
| dc.creator | Peng, T. H. | |
| dc.date | 2008-11-20 | |
| dc.date.accessioned | 2026-07-07T10:19:43Z | |
| dc.date.available | 2026-07-07T10:19:43Z | |
| dc.description | The whole sky differential star counts (DSC) with 1 degree resolution are retrieved from 2MASS online data service. Galaxy with double exponential thin and thick disks and a single power law luminosity function (LF) is used to interpret the 2MASS data. The slope of the DSC appears roughly isotropic over the whole sky, the average value is ~0.32, which corresponds to a power law index ~1.8 of the LF. We find that the scale-length and scale-height the thin disk are ~3.0 kpc and ~245 pc, and those of the thick disk are ~3.0 kpc and ~780 pc. The ratio of the thick disk to the thin disk is ~7%. The location of Sun above the disk is ~15 pc. A comparison of the data and model and their discrepancy are also provided. | |
| dc.identifier | https://arxiv.org/abs/0811.3269 | |
| dc.identifier | http://arxiv.org/abs/0811.3269 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174612 | |
| dc.subject | Astrophysics | |
| dc.title | Galactic Parameters from Whole Sky 2MASS Star Count | |
| dc.type | text |