Bibcode
Viero, M. P.; Moncelsi, L.; Mentuch, E.; Buitrago, F.; Bauer, A. E.; Chapin, E. L.; Conselice, C. J.; Devlin, M. J.; Halpern, M.; Marsden, G.; Netterfield, C. B.; Pascale, E.; Pérez-González, P. G.; Rex, M.; Scott, D.; Smith, M. W. L.; Truch, M. D. P.; Trujillo, I.; Wiebe, D. V.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 421, Issue 3, pp. 2161-2169.
Advertised on:
4
2012
Número de citas
29
Número de citas referidas
28
Descripción
We present measurements of the mean mid-infrared to submillimetre flux
densities of massive (M★≳ 1011
M&sun;) galaxies at redshifts 1.7 < z < 2.9, obtained
by stacking positions of known objects taken from the GOODS NICMOS
Survey (GNS) catalogue on maps at 24 ?m (Spitzer/MIPS); 70, 100 and 160
?m (Herschel/PACS); 250, 350 and 500 ?m (BLAST); and 870 ?m (LABOCA). A
modified blackbody spectrum fit to the stacked flux densities indicates
a median [interquartile] star formation rate (SFR) of SFR = 63[48, 81]
M&sun; yr-1. We note that not properly accounting
for correlations between bands when fitting stacked data can
significantly bias the result. The galaxies are divided into two groups,
disc-like and spheroid-like, according to their Sérsic indices,
n. We find evidence that most of the star formation is occurring in
n≤ 2 (disc-like) galaxies, with median [interquartile] SFR = 122[100,
150] M&sun; yr-1, while there are indications that
the n > 2 (spheroid-like) population may be forming stars at a median
[interquartile] SFR = 14[9, 20] M&sun; yr-1, if at
all. Finally, we show that star formation is a plausible mechanism for
size evolution in this population as a whole, but find only marginal
evidence that it is what drives the expansion of the spheroid-like
galaxies.
Proyectos relacionados
![TRACES Miembros del grupo](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/image.png?h=bdabf5b0&itok=05E6Kg4w)
Huellas de la Formación de las Galaxias: Poblaciones estelares, Dinámica y Morfología
Bienvenida a la página web del g rupo de investigación Traces of Galaxy Formation. Somos un grupo de investigación amplio, diverso y muy activo cuyo objetivo principal es entender la formación de galaxias en el Universo de una manera lo más completa posible. Con el estudio detellado de las poblaciones estelares como bandera, estamos constantemente
Ignacio
Martín Navarro