SDSS-IV MaNGA: Evidence for Enriched Accretion onto Satellite Galaxies in Dense Environments

Schaefer, Adam L.; Tremonti, Christy; Pace, Zachary J.; Belfiore, Francesco; Argudo-Fernández, M.; Bershady, Matthew A.; Drory, Niv; Jones, Amy; Maiolino, R.; Stark, David V.; Wake, David A.; Yan, Renbin

doi:10.3847/1538-4357/ab43ca

Cited by 25 publications

(19 citation statements)

References 102 publications

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“…One of the key elements of their argument is indeed the presence of a clear metallicity offset between centrals and satellites having the same SFR. A similar conclusion was recently reached by Schaefer et al (2019b), who looked at the resolved mass gas-phase metallicity of satellite and central galaxies extracted from the MaNGA survey.…”

Section: Gas-phase Metallicitiessupporting

confidence: 81%

“…It is now well established that, even when still forming stars at rates typical of what is observed in the star-forming main sequence, satellite galaxies in groups show gas-phase metallicities significantly higher (∼0.1-0.2 dex) than central galaxies of the same stellar mass. This increase in metallicity of the ISM has been reported by studies based on both fibre spectroscopy (e.g., Pasquali, Gallazzi, & van den Bosch 2012;Peng & Maiolino 2014;Wu et al 2017) and IFS data (e.g., Lian et al 2019;Schaefer et al 2019b) and appears to become more and more prominent with decreasing galaxy stellar mass (see Figure 17). While these observational findings are overall in agreement with results from clusters of galaxies and generally interpreted as evidence for the cessation of infall of pristine gas and stripping of cold ISM from the outer disc (see Sections 4.2 and 4.4), for satellites in groups multiple scenarios have been proposed.…”

Section: Gas-phase Metallicitiessupporting

confidence: 77%

“…As argued by Schaefer et al (2019b), the Lian et al ( 2019) sample extends to lower SFRs than the one used in other works, suggesting that they are much more sensitive to environmental effects than analyses focused on satellites that are pre-selected to lie on the star-forming main sequence. In other words, there may be multiple channels affecting the enrichment of satellite galaxies and our ability to trace them may heavily depend on sample selection criteria.…”

Section: Gas-phase Metallicitiesmentioning

confidence: 89%

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The Dawes Review 9: The role of cold gas stripping on the star formation quenching of satellite galaxies

Cortese

Catinella

Smith

2021

Publ. Astron. Soc. Aust.

129

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One of the key open questions in extragalactic astronomy is what stops star formation in galaxies. While it is clear that the cold gas reservoir, which fuels the formation of new stars, must be affected first, how this happens and what are the dominant physical mechanisms involved is still a matter of debate. At least for satellite galaxies, it is generally accepted that internal processes alone cannot be responsible for fully quenching their star formation, but that environment should play an important, if not dominant, role. In nearby clusters, we see examples of cold gas being removed from the star-forming discs of galaxies moving through the intracluster medium, but whether active stripping is widespread and/or necessary to halt star formation in satellites, or quenching is just a consequence of the inability of these galaxies to replenish their cold gas reservoirs, remains unclear. In this work, we review the current status of environmental studies of cold gas in star-forming satellites in the local Universe from an observational perspective, focusing on the evidence for a physical link between cold gas stripping and quenching of the star formation. We find that stripping of cold gas is ubiquitous in satellite galaxies in both group and cluster environments. While hydrodynamical mechanisms such as ram pressure are important, the emerging picture across the full range of dark matter halos and stellar masses is a complex one, where different physical mechanisms may act simultaneously and cannot always be easily separated. Most importantly, we show that stripping does not always lead to full quenching, as only a fraction of the cold gas reservoir might be affected at the first pericentre passage. We argue that this is a key point to reconcile apparent tensions between statistical and detailed analyses of satellite galaxies, as well as disagreements between various estimates of quenching timescales. We conclude by highlighting several outstanding questions where we expect to see substantial progress in the coming decades, thanks to the advent of the Square Kilometre Array and its precursors, as well as the next-generation optical and millimeter facilities.

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Section: Gas-phase Metallicitiessupporting

confidence: 81%

Section: Gas-phase Metallicitiessupporting

confidence: 77%

Section: Gas-phase Metallicitiesmentioning

confidence: 89%

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The Dawes Review 9: The role of cold gas stripping on the star formation quenching of satellite galaxies

Cortese

Catinella

Smith

2021

Publ. Astron. Soc. Aust.

129

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“…Balogh et al 2004;Poggianti et al 2006;Allen et al 2016;Owers et al 2019), a higher stellar metallicity (e.g. Schaefer et al 2019), older stellar ages (e.g. Thomas et al 2005;McDermid et al 2015), and a lower gas content (e.g.…”

Section: Introductionmentioning

confidence: 99%

The Fornax3D project: Assembly histories of lenticular galaxies from a combined dynamical and population orbital analysis

Poci,

McDermid,

Lyubenova

et al. 2021

Preprint

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In order to assess the impact of the environment on the formation and evolution of galaxies, accurate assembly histories of such galaxies are needed. However, these measurements are observationally difficult owing to the diversity of formation paths that lead to the same present-day state of a galaxy. In this work, we apply a powerful new technique in order to observationally derive accurate assembly histories through a self-consistent combined stellar dynamical and population galaxy model. We present this approach for three edge-on lenticular galaxies from the Fornax3D project -FCC 153, FCC 170, and FCC 177 -in order to infer their mass assembly histories individually and in the context of the Fornax cluster. The method was tested on mock data from simulations to quantify its reliability. We find that the galaxies studied here have all been able to form dynamically-cold (intrinsic vertical velocity dispersion σ z 50 km s −1 ) stellar disks after cluster infall. Moreover, the pre-existing (old) high angular momentum components have retained their angular momentum (orbital circularity λ z > 0.8) through to the present day. Comparing the derived assembly histories with a comparable galaxy in a low-density environment -NGC 3115 -we find evidence for cluster-driven suppression of stellar accretion and merging. We measured the intrinsic stellar age-velocity-dispersion relation and find that the shape of the relation is consistent with galaxies in the literature across redshift. There is tentative evidence for enhancement in the luminosity-weighted intrinsic vertical velocity dispersion due to the cluster environment. But importantly, there is an indication that metallicity may be a key driver of this relation. We finally speculate that the cluster environment is responsible for the S0 morphology of these galaxies via the gradual external perturbations, or 'harassment', generated within the cluster.

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“…The metallicity of galaxies in diverse environments is extensively studied in the local Universe. Small but significant environmental dependence of the MZR is found, especially for satellite galaxies, such that at a given stellar mass, galaxies in overdensities have higher gas-phase metallicities (e.g., Cooper et al 2008;Ellison et al 2009;Peng & Maiolino 2014;Wu et al 2017;Schaefer et al 2019). Cooper et al (2008) found that 15% of the measured scatter in the MZR is caused by environmental effects.…”

Section: Introductionmentioning

confidence: 99%

The MOSDEF Survey: Environmental dependence of the gas-phase metallicity of galaxies at $1.4 \leq z \leq 2.6$

Chartab,

Mobasher,

Shapley

et al. 2021

Preprint

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Using the near-IR spectroscopy of the MOSFIRE Deep Evolution Field (MOSDEF) survey, we investigate the role of local environment in the gas-phase metallicity of galaxies. The local environment measurements are derived from accurate and uniformly calculated photometric redshifts with wellcalibrated probability distributions. Based on rest-frame optical emission lines, [NII]λ6584 and Hα, we measure gas-phase oxygen abundance of 167 galaxies at 1.37 ≤ z ≤ 1.7 and 303 galaxies at 2.09 ≤ z ≤ 2.61, located in diverse environments. We find that at z ∼ 1.5, the average metallicity of galaxies in overdensities with M * ∼ 10 9.8 M , 10 10.2 M and 10 10.8 M is higher relative to their field counterparts by 0.094 ± 0.051, 0.068 ± 0.028 and 0.052 ± 0.043 dex, respectively. However, this metallicity enhancement does not exist at higher redshift, z ∼ 2.3, where, compared to the field galaxies, we find 0.056 ± 0.043, 0.056 ± 0.028 and 0.096 ± 0.034 dex lower metallicity for galaxies in overdense environments with M * ∼ 10 9.8 M , 10 10.2 M and 10 10.7 M , respectively. Our results suggest that, at 1.37 ≤ z ≤ 2.61, the variation of mass-metallicity relation with local environment is small (< 0.1dex), and reverses at z ∼ 2. Our results support the hypothesis that, at the early stages of cluster formation, owing to efficient gas cooling, galaxies residing in overdensities host a higher fraction of pristine gas with prominent primordial gas accretion, which lowers their gas-phase metallicity compared to their coeval field galaxies. However, as the Universe evolves to lower redshifts (z 2), the shock-heated gas in overdensities cannot cool down efficiently, and galaxies become metal-rich rapidly due to the suppression of pristine gas inflow and re-accretion of metal-enriched outflows in overdensities.

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SDSS-IV MaNGA: Evidence for Enriched Accretion onto Satellite Galaxies in Dense Environments

Cited by 25 publications

References 102 publications

The Dawes Review 9: The role of cold gas stripping on the star formation quenching of satellite galaxies

The Dawes Review 9: The role of cold gas stripping on the star formation quenching of satellite galaxies

The Fornax3D project: Assembly histories of lenticular galaxies from a combined dynamical and population orbital analysis

The MOSDEF Survey: Environmental dependence of the gas-phase metallicity of galaxies at $1.4 \leq z \leq 2.6$

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