Matches in SemOpenAlex for { <https://semopenalex.org/work/W2045587430> ?p ?o ?g. }
Showing items 1 to 78 of
78
with 100 items per page.
- W2045587430 endingPage "385" @default.
- W2045587430 startingPage "381" @default.
- W2045587430 abstract "We reviewed the multiple-wavelength spectrum of Sgr A*. The recent continuum spectrum was determined using data obtained from the Very Large Array (VLA), the Giant Metrewave Radio Telescope (GMRT), the Submillimeter Array (SMA) and the Keck II 10m telescope on the same date (2003 June 17). The nearly simultaneous spectrum (S∝ λα) covers a broad wavelength (A) range from 90 cm to 3.8 micron. From about 2 cm to 1 mm, the source shows a rising spectrum with a spectral index of α = 0.43 ± 0.04. However, the IR, measurements suggested that the flux density of Sgr A* must drastically drop towards the shorter wavelengths and the turnover likely occurs in the submillimeter regime. The spectrum at wavelengths between 47 and 3.6 cm is flat with α = 0.11 ± 0.03. The flux density of Sgr A* is 0.22±0.06 Jy at 90 cm on this date in 2003. Compared with measurement at 47 cm, the flux density at 90 cm has decreased by a factor of two (or ~ 4σ), suggesting a cutoff at wavelength longer than 47 cm. The fits using free-free absorption opacity to the spectrum suggest a cutoff wavelength at ~ 100 cm. The cutoff wavelength appears to be three times longer than that of ~ 30 cm determined by Davies, Walsh, & Booth [1] three decades ago based on observations in 1974 and 1975. A model interpreting the variation of the long wavelength cutoff using stellar winds (An et al. [2]) is summarized in this paper." @default.
- W2045587430 created "2016-06-24" @default.
- W2045587430 creator A5014272581 @default.
- W2045587430 creator A5017157541 @default.
- W2045587430 creator A5023344387 @default.
- W2045587430 creator A5024660332 @default.
- W2045587430 creator A5040941377 @default.
- W2045587430 creator A5048203434 @default.
- W2045587430 creator A5048700311 @default.
- W2045587430 date "2006-12-01" @default.
- W2045587430 modified "2023-10-18" @default.
- W2045587430 title "Simultaneous Multi-Wavelength Spectrum of Sgr A* and Long Wavelength Cutoff at λ > 30 cm" @default.
- W2045587430 cites W1834459731 @default.
- W2045587430 cites W1984617300 @default.
- W2045587430 cites W1998995113 @default.
- W2045587430 cites W2001259227 @default.
- W2045587430 cites W2001876144 @default.
- W2045587430 cites W2003155983 @default.
- W2045587430 cites W2024642828 @default.
- W2045587430 cites W2035100208 @default.
- W2045587430 cites W2036547256 @default.
- W2045587430 cites W2046703480 @default.
- W2045587430 cites W2061511714 @default.
- W2045587430 cites W2097618194 @default.
- W2045587430 cites W2136001359 @default.
- W2045587430 cites W2167902598 @default.
- W2045587430 cites W3011090980 @default.
- W2045587430 cites W3099313360 @default.
- W2045587430 cites W3105233890 @default.
- W2045587430 cites W3122533120 @default.
- W2045587430 cites W4242971931 @default.
- W2045587430 doi "https://doi.org/10.1088/1742-6596/54/1/060" @default.
- W2045587430 hasPublicationYear "2006" @default.
- W2045587430 type Work @default.
- W2045587430 sameAs 2045587430 @default.
- W2045587430 citedByCount "0" @default.
- W2045587430 crossrefType "journal-article" @default.
- W2045587430 hasAuthorship W2045587430A5014272581 @default.
- W2045587430 hasAuthorship W2045587430A5017157541 @default.
- W2045587430 hasAuthorship W2045587430A5023344387 @default.
- W2045587430 hasAuthorship W2045587430A5024660332 @default.
- W2045587430 hasAuthorship W2045587430A5040941377 @default.
- W2045587430 hasAuthorship W2045587430A5048203434 @default.
- W2045587430 hasAuthorship W2045587430A5048700311 @default.
- W2045587430 hasConcept C120665830 @default.
- W2045587430 hasConcept C121332964 @default.
- W2045587430 hasConcept C156778621 @default.
- W2045587430 hasConcept C2778217198 @default.
- W2045587430 hasConcept C44870925 @default.
- W2045587430 hasConcept C62520636 @default.
- W2045587430 hasConcept C6260449 @default.
- W2045587430 hasConceptScore W2045587430C120665830 @default.
- W2045587430 hasConceptScore W2045587430C121332964 @default.
- W2045587430 hasConceptScore W2045587430C156778621 @default.
- W2045587430 hasConceptScore W2045587430C2778217198 @default.
- W2045587430 hasConceptScore W2045587430C44870925 @default.
- W2045587430 hasConceptScore W2045587430C62520636 @default.
- W2045587430 hasConceptScore W2045587430C6260449 @default.
- W2045587430 hasLocation W20455874301 @default.
- W2045587430 hasOpenAccess W2045587430 @default.
- W2045587430 hasPrimaryLocation W20455874301 @default.
- W2045587430 hasRelatedWork W1982303044 @default.
- W2045587430 hasRelatedWork W2010133960 @default.
- W2045587430 hasRelatedWork W2010201075 @default.
- W2045587430 hasRelatedWork W2050942819 @default.
- W2045587430 hasRelatedWork W2079370748 @default.
- W2045587430 hasRelatedWork W2091478240 @default.
- W2045587430 hasRelatedWork W2106049774 @default.
- W2045587430 hasRelatedWork W3100040589 @default.
- W2045587430 hasRelatedWork W3103114574 @default.
- W2045587430 hasRelatedWork W3145073591 @default.
- W2045587430 hasVolume "54" @default.
- W2045587430 isParatext "false" @default.
- W2045587430 isRetracted "false" @default.
- W2045587430 magId "2045587430" @default.
- W2045587430 workType "article" @default.