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Far-infrared observations of Sagittarius A - The luminosity and dust density in the central parsec of the Galaxy
Abstract
Far-infrared observations of the central 4 arcmin of the Galaxy with 30-arcsec resolution made simultaneously at 30 microns, 50 microns, and 100 microns are presented. The 30-micron radiation peaks strongly at the position of the galactic center, as determined from the 2-micron surface brightness and the density of ionized gas. The 50- and 100-micron emission is much more extended along the plane and shows two emission lobes, one on either side of the 30-micron peak. At the position of the galactic center itself there is a local minimum in the 100-micron surface brightness. It is concluded that the dust density decreases inward over the central few parsecs of the Galaxy and that the dust density in the central parsec is so low that optical and ultraviolet radiation freely traverses this region. The total luminosity of the sources heating the dust which radiates the far-infrared emission from the central few parsecs is deduced to be between 1 x 10 to the 7th and 3 x 10 to the 7th solar luminosities.
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In the citing paper
“The CND has a total mass of 10 5 -6 M ⊙ and hosts several clumps with densities of ∼ 10 6 -8 cm -3 and gas temperatures of ∼ 50 K (Becklin et al. 1982; Brown & Liszt 1984; Genzel et al. 1985; Serabyn et al. 1986; Genzel et al. 2010; Hsieh et al. 2021).”
From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Becklin et al. 1982
In the citing paper
“The central 1 -1 . 5 pc radius can be described as the 'ionized cavity' ( T ∼ 5 -7 × 10 3 K) that is affected by the UV radiation either from Sgr A ∗ or from the nuclear starcluster (Becklin et al. 1982; Guesten et al. 1987; Shukla et al. 2004; Christopher et al. 2005).”
From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Becklin et al. 1982
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The Galactic Center massive black hole and nuclear star cluster
Genzel, R., Eisenhauer, F., & Gillessen, S. (2010) · Reviews of Modern Physics · doi:10.1103/revmodphys.82.3121 · Cited by 1,236
THE GALACTIC CENTER ENVIRONMENT
Morris, M., & Serabyn, E. (1996) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.34.1.645 · Cited by 930
“In order for centrally originating photons to propagate out to the CND’s inner boundary, the wind-evacuated central cavity must be comparatively transparent (Becklin et al 1982).”
BackgroundPhotodissociation regions in the interstellar medium of galaxies
Hollenbach, D. J., & Tielens, A. G. G. M. (1999) · Reviews of Modern Physics · doi:10.1103/revmodphys.71.173 · Cited by 801
Dense Photodissociation Regions (PDRs)
Hollenbach, D., & Tielens, A. (1997) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.35.1.179 · Cited by 400
The Supermassive Black Hole at the Galactic Center
Melia, F., & Falcke, H. D. (2001) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.39.1.309 · Cited by 502
Metadata
- Authors
- Becklin, E. E., Gatley, I., & Werner, M. W.
- ORCID
- Gatley, I.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1982-07
- Volume
- 258
- Pages
- 135
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2031070315
- Cited by
- 142
- References
- 0
- Citations by year
- 2025: 1 · 2024: 5 · 2023: 3 · 2022: 1 · 2021: 4 · 2020: 4 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 4 · 2015: 1 · 2014: 2 · 2013: 13 · 2012: 3
- FWCI
- 6.63
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Astrophysical Journal (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Keywords
- Sgr A*, Galactic Center, far-infrared emission, dust luminosity, central parsec, 100 micron emission, ionized gas
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