VERTICAL STRUCTURE OF NGC 4631

被引：6

作者：

Ann, Hong Bae ^{[1
]}

Seo, Mira ^{[1
]}

Baek, Su-Ja ^{[2
]}

机构：

[1] Pusan Natl Univ, Div Sci Educ, Pusan 609735, South Korea

[2] Ulsan High Sch, Ulsan 681222, South Korea

来源：

JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY | 2011年 / 44卷 / 01期

关键词：

galaxies: individual; NGC; 4631; galaxies: disk; galaxies: scale height; EDGE-ON GALAXIES; TELESCOPE ADVANCED CAMERA; DARK-MATTER UNIVERSE; SPIRAL GALAXIES; DISK GALAXIES; THICK DISKS; SURFACE PHOTOMETRY; GALACTIC DISKS; 3-DIMENSIONAL DISTRIBUTION; LENTICULAR GALAXIES;

D O I：

10.5303/JKAS.2011.44.1.23

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a deep CCD imaging in B and V bands which allows us to analyze the vertical structure of NGC 4631. We derive the scale heights of the thin and thick disks at a variety of positions along the major axis of the disk. The scale heights of the thin disk are nearly constant while those of the thick disk tend to increase with increasing galactocentric distance. The mean scale heights of the thin disk derived from B and V images are similar to each other ( 450 pc). Instead, those of the thick disk show a strong east-west asymmetry which is caused by the diffuse stellar emission that is most prominent in the north west regions above the disk plane. The ratio of scale heights (z(thick)/z(thin)) is about 2.5 in the east side of the disk. However, this ratio is greater than 4 for the thick disk above the disk plane in the west side of the galaxy.

引用

页码：23 / 32

页数：10

共 60 条

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