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Galactic structure from the Spacelab infrared telescope. II - Luminosity models of the Milky Way
Abstract
A 2.4-micron map of the northern Galactic plan is used to determine the 3D luminosity distribution of the Milky Way. The radial surface brightness profile of the disk is found to have an exponential scale length of 3.0 kpc. In the solar neighborhood, the scale height is about 247 pc, which is in agreement with star counts perpendicular to the Galactic plane. The scale height is not constant with the radius but decreases to about 165 pc. To the first order, the bulge can be represented by an oblate spheroid with an axis ratio of 0.61. The 2.2-micron/12-micron flux ratio for the bulge is typical of other dust-free spheroidal systems. Luminosity fluctuations along the Galactic plane are found to be caused chiefly by variations in the line-of-sight extinction.
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Cited by
The Milky Way in Molecular Clouds: A New Complete CO Survey
Dame, T. M., Hartmann, D., & Thaddeus, P. (2001) · The Astrophysical Journal · doi:10.1086/318388 · Cited by 2,115
Self-citationThe Galaxy in Context: Structural, Kinematic, and Integrated Properties
Bland-Hawthorn, J., & Gerhard, O. (2016) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081915-023441 · Cited by 1,656
Reid, M. J., Menten, K. M., Brunthaler, A., Zheng, X. W., Dame, T. M., Xu, Y., Wu, Y., Zhang, B., Sanna, A., Sato, M., et al. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/783/2/130 · Cited by 1,379
Self-citationMcMillan, P. J. (2011) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2011.18564.x · Cited by 789
Bovy, J., & Rix, H.-W. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/779/2/115 · Cited by 523
Metadata
- Authors
- Kent, S. M., Dame, T. M., & Fazio, G.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1991-09
- Volume
- 378
- Pages
- 131
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1963958308
- Cited by
- 321
- References
- 0
- FWCI
- 15.02
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kent, S. M., Dame, T. M., & Fazio, G. (1991). Galactic structure from the Spacelab infrared telescope. II - Luminosity models of the Milky Way. The Astrophysical Journal. https://doi.org/10.1086/170413
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