首页     开始     To Survive in the Universe    
Inhabited Sky
    News@Sky     天文图片     收集     论坛     Blog New!     常见问题     新闻     登录  

HD 80083


目录

图像

上传图像

DSS Images   Other Images


相关文章

Electronographic polarimetry - The Durham polarimeter
The present investigation is concerned with an instrument for mappingthe linear polarization of extended astronomical objects at opticalwavelengths. The first important studies of this type were based uponthe use of photographic techniques and photoelectric observations.Later, improvements in detector technology have made it possible toobserve fainter objects at higher spatial resolution. A description ispresented of the principles of operation of the Durham Universitypolarimeter which has been extensively used in the observations. Thepolarimeter uses a 40-mm McMullan electronographic camera to providesimultaneous detection at all the image points. The selected approachprovides advantages of increased speed, linearity, resolution, dynamicrange, and storage capacity in comparison to photographic detection.

New map of the optical polarisation of galaxy M82
Observations of the linear optical polarization of the galaxy M82 wereobtained during the period Feb. 27-Mar. 15, 1975 using a polarimetrictechique derived from that of Ohman (1939). A rotating achromatichalf-wave plate and a Wollaston prism were used to separate orthogonallypolarized beams. The optical polarization map shows a centrallysymmetric pattern which permits the derivation of the position of thecentral source of radiation. A singular nucleus could not be identified;there is no detailed correspondence between the various central featuresin M82. The most intense radio component has no special position in theinfrared source, which is not coincident with the center of symmetry.The optically brightest spot is close to the center of the infraredsource but not to the other features. It is suggested that galaxies ofthe type of M82 might represent a connecting link between Seyferts andnormal galaxies.

提交文章


相关链接

  • - 没有找到链接 -
提交链接


下列团体成员


观测天体数据

星座:長蛇座
右阿森松:09h17m36.04s
赤纬:-07°27'46.5"
视星:8.86
距离:10000000 天文距离
右阿森松适当运动:-5.4
赤纬适当运动:-2.3
B-T magnitude:8.789
V-T magnitude:8.855

目录:
适当名称   (Edit)
HD 1989HD 80083
TYCHO-2 2000TYC 4892-882-1
USNO-A2.0USNO-A2 0825-06803282
HIPHIP 45596

→ 要求更多目录从vizier