High-Velocity Outflows Without Agn Feedback: Eddington-Limited Star Formation in Compact Massive Galaxies

Diamond‐Stanic, Aleksandar M.; Moustakas, John; Tremonti, Christy; Coil, Alison L.; Hickox, Ryan C.; Robaina, Aday R.; Rudnick, Gregory; Sell, Paul H.

doi:10.1088/2041-8205/755/2/l26

Cited by 134 publications

(206 citation statements)

References 49 publications

Supporting

Mentioning

194

Contrasting

Order By: Relevance

“…This would also explain the observations of high velocity (i.e. v∼1000 km s −1 ) molecular outflows in stacked spectra of galaxies which do not show a clear AGN contribution (Chung et al 2011), as well as the detection of very fast atomic outflows (v < 1000 km s −1 ) in galaxies at z∼0.6 showing no evidence of strong AGN activity (Diamond-Stanic et al 2012): in these cases the AGN may not dominate the total luminosity (and its detection may be made difficult by the dilution from the starburst in the host galaxy), but it may still dominate the outflow mechanism. AGN variability can also account for the lack of AGN detection in these sources.…”

Section: Discussionmentioning

confidence: 80%

“…Rupke & Veilleux 2011Müller-Sánchez et al 2011;Mullaney et al 2013;Emonts et al 2005;Morganti et al 2003Morganti et al , 2005Rodríguez Zaurín et al 2013) and at high redshift (e.g. Harrison et al 2012;Cano-Díaz et al 2012;Diamond-Stanic et al 2012;Bradshaw et al 2013;Alexander et al 2010;Maiolino et al 2012), the interferometric mapping of the high velocity component of CO millimeter emission has proved to be very effective. Indeed this method, as mentioned, allows us to directly trace outflows of the molecular phase out of which stars form, which in most galaxies also represents the bulk of the ISM; moreover the spectro-imaging information delivered by millimeter interferometers allows us to determine the size and geometry of the outflow, hence to accurately estimate the outflow rate and energetics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Massive molecular outflows and evidence for AGN feedback from CO observations

Cicone

Maiolino

Sturm

et al. 2014

A&A

885

126

1,224

View full text Add to dashboard Cite

We study the properties of massive, galactic-scale outflows of molecular gas and investigate their impact on galaxy evolution. We present new IRAM PdBI CO(1-0) observations of local ULIRGs and QSO hosts: clear signature of massive and energetic molecular outflows, extending on kpc scales, is found in the CO(1-0) kinematics of four out of seven sources, with measured outflow rates of several 100 M yr −1 . We combine these new observations with data from the literature, and explore the nature and origin of massive molecular outflows within an extended sample of 19 local galaxies. We find that starburst-dominated galaxies have an outflow rate comparable to their SFR, or even higher by a factor of ∼2-4, implying that starbursts can indeed be effective in removing cold gas from galaxies. Nevertheless, our results suggest that the presence of an AGN can boost the outflow rate by a large factor, which is found to increase with the L AGN /L bol ratio. The gas depletion time-scales due to molecular outflows are anti-correlated with the presence and luminosity of an AGN in these galaxies, and range from a few hundred million years in starburst galaxies, down to just a few million years in galaxies hosting powerful AGNs. In quasar hosts the depletion time-scales due to the outflow are much shorter than the depletion time-scales due to star formation. We estimate the outflow kinetic power and find that, for galaxies hosting powerful AGNs, it corresponds to about 5% of the AGN luminosity, as expected by models of AGN feedback. Moreover, we find that momentum rates of about 20 L AGN /c are common among the AGN-dominated sources in our sample. For "pure" starburst galaxies our data tentatively support models in which outflows are mostly momentum-driven by the radiation pressure from young stars onto dusty clouds. Overall, our results indicate that, although starbursts are effective in powering massive molecular outflows, the presence of an AGN may strongly enhance such outflows and, therefore, have a profound feedback effect on the evolution of galaxies, by efficiently removing fuel for star formation, hence quenching star formation.

show abstract

Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Massive molecular outflows and evidence for AGN feedback from CO observations

Cicone

Maiolino

Sturm

et al. 2014

A&A

885

126

1,224

View full text Add to dashboard Cite

show abstract

“…Empirical studies of star-formation driven outflows have traditionally focused on the physics of winds around systems with extreme characteristics; i.e., exceptionally high spatial concentrations of star formation (Σ SFR 0.1 M yr −1 kpc −2 ; Schwartz & Martin 2004;Tremonti et al 2007;Diamond-Stanic et al 2012) and/or ongoing merger activity (e.g., Heckman et al 2000;Martin 2005). Recently, however, deep surveys have begun to explore the wind properties of more typical starforming systems (e.g., Sato et al 2009).…”

Section: The Ubiquity Of Outflows On Thementioning

confidence: 99%

EVIDENCE FOR UBIQUITOUS COLLIMATED GALACTIC-SCALE OUTFLOWS ALONG THE STAR-FORMING SEQUENCE ATz∼ 0.5

Rubin

Prochaska

Koo

et al. 2014

ApJ

346

452

View full text Add to dashboard Cite

We analyze Mg ii λλ2796, 2803 and Fe ii λλ2586, 2600 absorption profiles in individual spectra of 105 galaxies at 0.3 < z < 1.4. The galaxies, drawn from redshift surveys of the GOODS fields and the Extended Groth Strip, sample the range in star formation rates (SFRs) occupied by the star-forming sequence with stellar masses log M * /M 9.6 down to SFR 2 M yr −1 at 0.3 < z < 0.7. Using the Doppler shifts of Mg ii and Fe ii absorption as tracers of cool gas kinematics, we detect large-scale winds in 66 ± 5% of the galaxies. Hubble Space Telescope Advanced Camera for Surveys imaging and our spectral analysis indicate that the outflow detection rate depends primarily on galaxy orientation: winds are detected in ∼89% of galaxies having inclinations (i) < 30 • (faceon), while the wind detection rate is ∼45% in objects having i > 50 • (edge-on). Combined with the comparatively weak dependence of wind detection rate on intrinsic galaxy properties, this implies that biconical outflows are ubiquitous in normal, star-forming galaxies at z ∼ 0.5. We find that wind velocity is correlated with galaxy M * at 3.4σ significance, while outflow equivalent width is correlated with SFR at 3.5σ significance, suggesting hosts with higher SFR launch more material and/or generate a larger velocity spread for the absorbing clouds. Assuming the gas is driven into halos with isothermal density profiles, the wind velocities (∼200-400 km s −1 ) permit escape from the halo potentials only for the lowest-M * systems in the sample. However, the gas carries sufficient energy to reach distances 50 kpc, and may therefore be a viable source of material for the massive, cool circumgalactic medium around bright galaxies at z ∼ 0.

show abstract

“…This energy feedback heats up, ionizes and drives gas outward, often generating large-scale outflows/winds (e.g., Burke 1968;Mathews & Baker 1971;Vader 1986; ⋆ E-mail: pbarai@oats.inaf.it Veilleux, Cecil & Bland-Hawthorn 2005;Rubin et al 2010). Galactic outflows are observed at low redshifts (e.g., Burbidge, Burbidge & Rubin 1964;Fabbiano & Trinchieri 1984;Ohyama, Taniguchi & Terlevich 1997;Smith, Struck & Nowak 2005;Arribas et al 2014), reaching velocity as large as 1000 km/s (Diamond-Stanic et al 2012;Bradshaw et al 2013), and at high-z (e.g., Frye, Broadhurst & Benitez 2002;Wilman et al 2005;Weiner et al 2009;Kornei et al 2012;Tang et al 2014), up to z ∼ 5 (Dawson et al 2002), sometimes extending over c 0000 RAS distances of 60 − 130 physical kpc (e.g., Steidel et al 2011;Lundgren et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Galactic outflow and diffuse gas properties at z ≥ 1 using different baryonic feedback models

Barai

Monaco

Murante

et al. 2014

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We measure and quantify properties of galactic outflows and diffuse gas at z 1 in cosmological hydrodynamical simulations performed using the GADGET-3 code containing novel baryonic feedback models. Our sub-resolution model, MUPPI, implements supernova feedback using fully local gas properties, where the wind velocity and mass loading are not given as input. We find the following trends at z = 2 by analysing central galaxies having a stellar mass higher than 10 9 M ⊙ . The outflow velocity and mass outflow rate (Ṁ out ) exhibit positive correlations with galaxy mass and with the star formation rate (SFR). However, most of the relations present a large scatter. The outflow mass loading factor (η) is between 0.2 − 10, with an average η ∼ 1. The comparison Effective model generates a constant outflow velocity as expected from the input fixed wind kick speed, and a negative correlation of η with halo mass as opposed to the fixed input η. The shape of the outflows is bi-polar in 95% of the MUPPI galaxies. The MUPPI model produces colder galaxy cores and flatter gas metallicity radial profiles than the Effective model. The number fraction of galaxies where outflow is detected decreases at lower redshifts, but remains more than 80% over z = 1 − 5. High SF activity at z ∼ 2 − 4 drives strong outflows, causing the positive and steep correlations of velocity andṀ out with SFR. The outflow velocity correlation with SFR becomes flatter at z = 1, and η displays a negative correlation with halo mass in massive galaxies. Our study demonstrates that both the MUPPI and Effective models produce significant outflows at ∼ 1/10 of the virial radius; at the same time shows that the properties of outflows generated can be different from the input speed and mass loading in the Effective model. Our MUPPI model, using local properties of gas in the sub-resolution recipe, is able to develop galactic outflows whose properties correlate with global galaxy properties, and consistent with observations.

show abstract

High-Velocity Outflows Without Agn Feedback: Eddington-Limited Star Formation in Compact Massive Galaxies

Cited by 134 publications

References 49 publications

Massive molecular outflows and evidence for AGN feedback from CO observations

Massive molecular outflows and evidence for AGN feedback from CO observations

EVIDENCE FOR UBIQUITOUS COLLIMATED GALACTIC-SCALE OUTFLOWS ALONG THE STAR-FORMING SEQUENCE ATz∼ 0.5

Galactic outflow and diffuse gas properties at z ≥ 1 using different baryonic feedback models

Contact Info

Product

Resources

About