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HD 224708


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Ultraviolet extinction and diffuse band strength correlations
Correlations between UV extinction parameters and diffuse band strengthsare south, using a data base of 50 stars with recently measuredextinction curves. A novel aspect of this study is that the basicdependence of most interstellar parameters on E(B-V) (or, nearlyequivalently, on the total hydrogen column density) has been largelycanceled out. After this cancellation, a weak correlation is foundbetween the 4430 A diffuse band and the 2175 A extinction feature. Noother correlations are found. These results support a molecular originfor the 5780 A and 6284 A bands. It is speculated that the correlationpattern found for the 4430 A band can be explained if this bandoriginates in reactions on disordered grain surfaces.

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观测天体数据

星座:仙女座
右阿森松:00h00m08.48s
赤纬:+36°35'09.5"
视星:8.598
距离:207.9 天文距离
右阿森松适当运动:-7.5
赤纬适当运动:9.2
B-T magnitude:10
V-T magnitude:8.714

目录:
适当名称   (Edit)
HD 1989HD 224708
TYCHO-2 2000TYC 2271-1411-1
USNO-A2.0USNO-A2 1200-00001253
HIPHIP 9

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