Details

Autor(en) / Beteiligte

• ster Schreiber, N M
• Übler, H
• Davies, R L
• Genzel, R
• Wisnioski, E
• Belli, S
• Shimizu, T
• Lutz, D
• Fossati, M
• Herrera-Camus, R
• Mendel, J T
• Tacconi, L J
• Wilman, D
• Beifiori, A
• Brammer, G B
• Burkert, A
• Carollo, C M
• Davies, R I
• Eisenhauer, F
• Fabricius, M
• Lilly, S J
• Momcheva, I
• Naab, T
• Nelson, E J
• Price, S H
• Renzini, A
• Saglia, R
• Sternberg, A
• P van Dokkum
• Wuyts, S

Titel

The KMOS3D Survey: Demographics and Properties of Galactic Outflows at z = 0.6–2.7

Ist Teil von

• The Astrophysical journal, 2019-04, Vol.875 (1)

Ort / Verlag

Philadelphia: IOP Publishing

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We present a census of ionized gas outflows in 599 normal galaxies at redshift 0.6 < z < 2.7, mostly based on integral field spectroscopy of Hα, [N ii], and [S ii] line emission. The sample fairly homogeneously covers the main sequence of star-forming galaxies with masses 9.0 < log(M */M ⊙) < 11.7, and probes into the regimes of quiescent galaxies and starburst outliers. About one-third exhibits the high-velocity component indicative of outflows, roughly equally split into winds driven by star formation (SF) and active galactic nuclei (AGNs). The incidence of SF-driven winds correlates mainly with SF properties. These outflows have typical velocities of ∼450 km s−1, local electron densities of n e ∼ 380 cm−3, modest mass loading factors of ∼0.1–0.2 at all galaxy masses, and energetics compatible with momentum driving by young stellar populations. The SF-driven winds may escape from log(M */M ⊙) ≲ 10.3 galaxies, but substantial mass, momentum, and energy in hotter and colder outflow phases seem required to account for low galaxy formation efficiencies in the low-mass regime. Faster AGN-driven outflows (∼1000–2000 km s−1) are commonly detected above log(M */M ⊙) ∼ 10.7, in up to ∼75% of log(M */M ⊙) ≳ 11.2 galaxies. The incidence, strength, and velocity of AGN-driven winds strongly correlates with stellar mass and central concentration. Their outflowing ionized gas appears denser (n e ∼ 1000 cm−3), and possibly compressed and shock-excited. These winds have comparable mass loading factors as the SF-driven winds but carry ∼10 (∼50) times more momentum (energy). The results confirm our previous findings of high-duty-cycle, energy-driven outflows powered by AGN above the Schechter mass, which may contribute to SF quenching.