论文标题
在螺旋星系的细圆盘中，恒星形成面对面
Star formation in thin disks of spiral galaxies seen face-on
论文作者
论文摘要
对后来的SC，SCD和SD类型的181个星系进行了恒星形成的综合（SFR）和特定（SSFR）速率的估计。它们的SFR是根据Galex调查中的FUV通量确定的。 SSFR的中值为：SC的-10.66 dex，-10.44 dex用于SCD和-10.40 DEX，用于YR -1单位的SD类型。这些星系的SSFR的平均值从低质量到巨大磁盘平稳地掉落。考虑到光度误差后，特定的恒星形成速率的较小宇宙变化为0.16 dex。为了在13.8 Gyr的宇宙时间重现观测到的恒星质量，过去没有凸起的星系面对面必须比现在观察到的SFR高两三倍。
Estimates of the integrated (SFR) and specific (sSFR) rates of star formation are given for 181 galaxies of later Sc, Scd, and Sd types seen almost face-on. Their SFRs were determined from FUV fluxes in the GALEX survey. The median values of the sSFR are: -10.66 dex for Sc, -10.44 dex for Scd, and -10.40 dex for Sd types in units of yr-1. The average value of the sSFR for these galaxies falls off smoothly from lowmass to giant disks. After accounting for photometric errors, the specific star formation rate has a small cosmic variation of 0.16 dex. In order to reproduce the observed stellar mass on a cosmic time of 13.8 Gyr, the galaxies without bulges viewed face-on must have had an SFR two-three times higher in the past than observed now.
