INFRARED IMAGING OF M CAS-B USING RAPID IMAGE MOTION COMPENSATION

被引：9

作者：

MCCARTHY, D ^{[1
]}

HANCOCK, T ^{[1
]}

FREEMAN, J ^{[1
]}

MCLEOD, B ^{[1
]}

LLOYDHART, M ^{[1
]}

COLUCCI, D ^{[1
]}

WIZINOWICH, P ^{[1
]}

CLAMPIN, M ^{[1
]}

GOLIMOWSKI, D ^{[1
]}

DURRANCE, S ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

来源：

ASTRONOMICAL JOURNAL | 1993年 / 105卷 / 02期

关键词：

D O I：

10.1086/116463

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The orbital parameters and component masses of the mu Cas binary system can provide a measure of the helium abundance in the early Galaxy. In a continuing effort to measure these characteristics, we have obtained the first direct images of the low mass companion to mu Cas A using techniques for high speed correction of image motion at 1.25 and 1.65 mum. These techniques include real-time tracking of the brightest infrared speckle at 75 Hz and of the visible centroid at 500 Hz. Mu Cas B is easily detected with a magnitude difference relative to the primary of > 4 at a separation of approximately 1.4 arcsec. Its energy distribution from 0.55 to 3.4 mum yields an effective temperature (3034 +/- 160 K), stellar diameter (0.26 R(.), and luminosity (0.0051 +/- 0.0011 L.). A direct mass measurement using two photocentric orbits yields 0.15 +/- 0.0013 M.. Significant improvements in these parameters can result from astrometric, spectroscopic, and imaging observations of the upcoming periastron passage.

引用

页码：652 / 659

页数：8

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[1] ASTRONOMICAL SPECKLE IMAGING [J].