4.7 Article

Planetary nebulae and stellar kinematics in the flattened elliptical galaxy NGC 1344

期刊

ASTROPHYSICAL JOURNAL
卷 635, 期 1, 页码 290-304

出版社

IOP PUBLISHING LTD
DOI: 10.1086/497364

关键词

galaxies : distances and redshifts; galaxies : individual (NGC 1344); galaxies : kinematics and dynamics; planetary nebulae : general; techniques : radial velocities

向作者/读者索取更多资源

We present photometric and kinematic information obtained by measuring 197 planetary nebulae (PNs) discovered in the flattened Fornax elliptical galaxy NGC 1344 ( also known as NGC 1340) with an on-band, off-band, and grism+on- band filter technique. We build the PN luminosity function (PNLF) and use it to derive a distance modulusm m-M = 31.4 +/- 0.18, which is slightly smaller than, but in good agreement with, the surface brightness fluctuation distance. The PNLF also provides an estimate of the specific PN formation rate: (6 +/- 3) x 10(-12) PNs yr(-1) L-circle dot(-1) If we combine the positional information from the on- band image with PN positions measured on the grism+ on- band image, we can measure the radial velocities of 195 PNs, some of them distant more than three effective radii from the center of NGC 1344. We complement this data set with stellar kinematics derived from integrated spectra along the major and minor axes and parallel to the major axis of NGC 1344. The line-of-sight velocity dispersion profile indicates the presence of a dark matter halo around this galaxy.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据