论文标题
通过[C II]的索非亚观察结果所追踪的边缘星系中的外推气管
Extraplanar gas in Edge-on Galaxies traced by SOFIA observations of [C II]
论文作者
论文摘要
星系中的局部恒星形成爆发可以使其中间平面的材料悬浮。边缘旋转的螺旋星系可以清楚地区分星系中间平面的材料。我们使用索非亚测量[C II] 157.7微米线的垂直分布，用于附近两个，边缘星系，NGC 891和NGC 5907。我们发现，对于NGC 891的北部以及NGC 5907，ANGENTER的北部地区，A shine and and and and and and and and and（0.3 KPC）在中央区域和积极形式形成的区域（均为0.3 kpc）。比例高度约为2 kpc。 [C II]比中红外发射（0.1 kpc，追踪当今的巨大恒星形成）要延长得多，但不如H I（100 kpc，追踪低金属/ - 半乳酸物质）延伸。外推[C II]可能会发生在将磁盘连接到光环的烟囱的墙壁上。
Bursts of localized star formation in galaxies can levitate material from their midplanes. Spiral galaxies that are edge-on allow clear distinction of material that is levitated off the galaxies' midplanes. We used SOFIA to measure the vertical distribution of [C II] 157.7 micron line emission for two nearby, edge-on galaxies, NGC 891 and NGC 5907. We find that for the central region and actively-star-forming regions in the northern portion of NGC 891, and for NGC 5907, a thin (0.3 kpc) disk is supplemented by a thick disk with an exponential scale height of about 2 kpc. The [C II] is far more extended than mid-infrared emission (0.1 kpc, tracing present-day massive star formation) but not as extended as the H I (100 kpc, tracing low-metallicity circum/inter-galactic matter). The extraplanar [C II] may arise in walls of chimneys that connect the disk to the halo.
