UV and NIR size of the low-mass field galaxies: the UV compact galaxies

Autor: Jiasheng Huang, Cheng Cheng, Sophia Dai, Lizhi Xie, Wei Du, Shumei Wu, Xu Shao, C. K. Xu, Roger Leiton, Gustavo Orellana-González, Nicole Araneda, Zhizheng Pan, P. Assmann
Rok vydání: 2020
Předmět:
Zdroj: Astronomy & Astrophysics. 633:A105
ISSN: 1432-0746
0004-6361
DOI: 10.1051/0004-6361/201936186
Popis: Most of the massive star-forming galaxies are found to have `inside-out' stellar mass growth modes, which means the inner parts of the galaxies mainly consist of the older stellar population, while the star forming in the outskirt of the galaxy is still ongoing. The high-resolution HST images from Hubble Deep UV Legacy Survey (HDUV) and Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) projects with the unprecedented depth in both F275W and F160W bands are the perfect data sets to study the forming and formed stellar distribution directly. We selected the low redshift ($0.05 < z_{\rm spec} < 0.3$) galaxy sample from the GOODS-North field where the HST F275W and F160W images are available. Then we measured the half light radius in F275W and F160W bands, which are the indicators of the star formation and stellar mass. By comparing the F275W and F160W half light radius, we find the massive galaxies are mainly follow the `inside-out' growth which is consistent with the previous results. Moreover, the HST F275W and F160W images reveal that some of the low-mass galaxies ($
10 pages, 10 Figures, accepted by A&A
Databáze: OpenAIRE