%0 Journal Article %T Tracing Recent Star Formation of Red Early-type Galaxies out to z ~ 1 %+ Institut d'Astrophysique de Paris (IAP) %A Ko, Jongwan %A Hwang, Ho Seong %A Im, Myungshin %A Le Borgne, Damien %A Lee, Jong Chul %A Elbaz, David %< avec comité de lecture %@ 0004-637X %J The Astrophysical Journal %I American Astronomical Society %V 791 %8 2014 %D 2014 %Z 1407.3525 %Z 2014ApJ...791..134K %R 10.1088/0004-637X/791/2/134 %K galaxies: evolution %K galaxies: stellar content %K infrared: galaxies %K Astrophysics - Astrophysics of Galaxies %K Astrophysics - Cosmology and Nongalactic Astrophysics %Z Sciences of the Universe [physics]Journal articles %X We study the mid-infrared (IR) excess emission of early-type galaxies (ETGs) on the red sequence at z < 1 using a spectroscopic sample of galaxies in the fields of Great Observatories Origins Deep Survey (GOODS). In the mass-limited sample of 1025 galaxies with M star > 1010.5 M and 0.4 < z < 1.05, we identify 696 Spitzer 24 μm detected (above the 5σ) galaxies and find them to have a wide range of NUV-r and r-[12 μm] colors despite their red optical u - r colors. Even in the sample of very massive ETGs on the red sequence with M star > 1011.2 M , more than 18% show excess emission over the photospheric emission in the mid-IR. The combination with the results of red ETGs in the local universe suggests that the recent star formation is not rare among quiescent, red ETGs at least out to z ~ 1 if the mid-IR excess emission results from intermediate-age stars or/and from low-level ongoing star formation. Our color-color diagram including near-UV and mid-IR emissions are efficient not only for identifying ETGs with recent star formation, but also for distinguishing quiescent galaxies from dusty star-forming galaxies. %G English %L insu-03645344 %U https://insu.hal.science/insu-03645344 %~ INSU %~ CNRS %~ IAP %~ SORBONNE-UNIVERSITE %~ SU-INF-2018 %~ SU-SCIENCES %~ SU-TI %~ ALLIANCE-SU