【摘要】：基于COSMOS(Cosmic Evolution Survey)/Ultra VISTA(Ultra-deep Visible and Infrared Survey Telescope for Astronomy)場(chǎng)中多波段測(cè)光數(shù)據(jù),利用質(zhì)量限選取了紅移分布在0z3.5的星系樣本.通過(guò)UVJ(U-V和V-J)雙色圖分類(lèi)判據(jù)將星系分類(lèi)成恒星形成星系(SFGs)和寧?kù)o星系(QGs).對(duì)于紅移分布在0z1.5范圍內(nèi)且M*1011M⊙的QGs來(lái)說(shuō),該星系在樣本中所占比例高于70%.在紅移0z3.5范圍內(nèi),恒星形成星系的恒星形成率(SFR)與恒星質(zhì)量(M*)之間有著很強(qiáng)的主序(MS)關(guān)系.對(duì)于某一固定的恒星質(zhì)量M*來(lái)說(shuō),星系的SFR和比恒星形成率(s SFR)會(huì)隨著紅移增大而增大,這表明在高紅移處恒星形成星系更加活躍,有激烈的恒星形成.相對(duì)于低質(zhì)量的星系來(lái)說(shuō),高質(zhì)量的SFGs有較低的s SFR,這意味著低質(zhì)量星系的增長(zhǎng)更多的是通過(guò)星系本身的恒星形成.通過(guò)結(jié)合來(lái)自文獻(xiàn)中數(shù)據(jù)點(diǎn)信息,發(fā)現(xiàn)更高紅移(2z8)星系的s SFR隨紅移的演化趨勢(shì)變?nèi)?其演化關(guān)系是s SFR∝(1+z)0.94±0.17.
[Abstract]:Based on the multiband photometry data in COSMOS (Cosmic Evolution Survey) / Ultra VISTA (Ultra-deep Visible and Infrared Survey Telescope for Astronomy) field, the redshift galaxy samples distributed in 0z3.5 are selected by using the mass limit. Classification of galaxies into star-forming galaxies (SFGs) and quiet galaxies (QGs). By UVJ (U-V and V-J) binary color map classification criteria For QGs with redshift in the range of 0z1.5 and MG1011M 298, the proportion of the galaxy in the sample is higher than 70. In the range of redshift 0z3.5, there is a strong relationship between star formation rate (SFR) and star mass (M *) in star forming galaxies. For a fixed star mass M *, the SFR and the specific star formation rate (s SFR) of the galaxy increase with the redshift, indicating that the star forming galaxy is more active and has intense star formation at the location of Gao Hong's shift. The high mass SFGs has a lower s SFR, than the low mass galaxies, which means that the growth of the low mass galaxies is more through the star formation of the galaxy itself. By combining the data point information from the literature, it is found that the s SFR of the more Gao Hong shift (2z8) galaxy becomes weaker with the redshift evolution, and the evolutionary relationship is s SFR 鈭，

本文編號(hào)：2426629