{ "id": "1511.08438", "version": "v1", "published": "2015-11-26T16:14:09.000Z", "updated": "2015-11-26T16:14:09.000Z", "title": "Analysis of the Z Distribution of Young Objects in the Galactic Thin Disk", "authors": [ "V. V. Bobylev", "A. T. Bajkova" ], "comment": "13 pages, 2 figures, 2 tables", "journal": "Astronomy Letters, 2016, Vol. 42, No. 1, pp. 1-9", "doi": "10.1134/S1063773716010023", "categories": [ "astro-ph.GA" ], "abstract": "We have obtained new estimates of the Sun's distance from the symmetry plane Zo and the vertical disk scale height h using currently available data on stellar OB associations, Wolf-Rayet stars, HII regions, and Cepheids. Based on individual determinations, we have calculated the mean Zo=-16+/-2 pc. Based on the model of a self-gravitating isothermal disk for the density distribution, we have found the following vertical disk scale heights: h = 40.2+/-2.1 pc from OB associations, h = 47.8+/-3.9 pc from Wolf-Rayet stars, h=48.4+/-2.5 pc from HII regions, and h = 66.2+/-1.6 pc from Cepheids. We have estimated the surface, \\sum=6 kpc^{-2}, and volume, D(Zo) = 50.6 kpc^{-3}, densities from a sample of OB associations. We have found that there could be approximately 5000 OB associations in the Galaxy.", "revisions": [ { "version": "v1", "updated": "2015-11-26T16:14:09.000Z" } ], "analyses": { "keywords": [ "galactic thin disk", "young objects", "vertical disk scale height", "distribution", "hii regions" ], "tags": [ "journal article" ], "publication": { "journal": "Astronomy Letters", "year": 2016, "month": "Jan", "volume": 42, "number": 1, "pages": 1 }, "note": { "typesetting": "TeX", "pages": 13, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2016AstL...42....1B" } } }