The mass-metallicity relation at cosmic noon in overdense environments: first results from the MAMMOTH-Grism HST slitless spectroscopic survey. Wang, X., Li, Z., Cai, Z., Shi, D. D., Fan, X., Zheng, X. Z., Bian, F., Teplitz, H. I., Alavi, A., Colbert, J. W., Henry, A. L., & Malkan, M. A. Technical Report August, 2021. Publication Title: arXiv e-prints ADS Bibcode: 2021arXiv210806373W Type: article
The mass-metallicity relation at cosmic noon in overdense environments: first results from the MAMMOTH-Grism HST slitless spectroscopic survey [link]Paper  abstract   bibtex   
The MAMMOTH-Grism slitless spectroscopic survey is a Hubble Space Telescope (HST) cycle-28 medium program, which is obtaining 45 orbits of WFC3/IR grism spectroscopy in the density peak regions of three massive galaxy protoclusters at \$z=2-3\$ discovered using the MAMMOTH technique. We introduce this survey by presenting the first measurement of mass-metallicity relation (MZR) at high redshift in overdense environments via grism spectroscopy. From the completed MAMMOTH-Grism observation in the field of the BOSS1244 protocluster at \$z=2.24{\textbackslash}pm0.02\$, We secure a sample of 36 protocluster member galaxies at \$z{\textbackslash}sim2.24\$, showing strong nebular emission lines ([O III], H\${\textbackslash}beta\$ and [O II]) in their G141 spectra. Using the multi-wavelength broad-band deep imaging from HST and ground-based telescopes, we measure their stellar masses in the range of \$[10{\textasciicircum}\{9\},10{\textasciicircum}\{10.4\}]M_{\textbackslash}odot\$, instantaneous star formation rates (SFR) from 10 to 240\$M_{\textbackslash}odot yr{\textasciicircum}\{-1\}\$, and global gas-phase metallicities [1/3,1] of solar. Compared with similarly selected field galaxy sample at the same redshift, our galaxies show on average increased SFRs by \textasciitilde0.06dex and \textasciitilde0.18dex at \textasciitilde10\${\textasciicircum}\{10.1\}M_{\textbackslash}odot\$ and \textasciitilde10\${\textasciicircum}\{9.8\}M_{\textbackslash}odot\$, respectively. Using the stacked spectra of our sample galaxies, we derive the MZR in the BOSS1244 protocluster core as \$12+{\textbackslash}log(\{{\textbackslash}rm O/H\})=(0.136{\textbackslash}pm0.018){\textbackslash}times{\textbackslash}log(M_{\textbackslash}ast/M_{\textbackslash}odot)+(7.082{\textbackslash}pm0.175)\$, showing significantly shallower slope than that in the field. This shallow MZR slope is likely caused by the combined effects of efficient recycling of feedback-driven winds and cold-mode gas accretion in protocluster environments. The former effect helps low-mass galaxies residing in overdensities retain their metal production, whereas the latter effect dilutes the metal content of high-mass galaxies, making them more metal poor than their coeval field counterparts.
@techreport{2021arXiv210806373W,
	title = {The mass-metallicity relation at cosmic noon in overdense environments: first results from the {MAMMOTH}-{Grism} {HST} slitless spectroscopic survey},
	shorttitle = {The mass-metallicity relation at cosmic noon in overdense environments},
	url = {https://ui.adsabs.harvard.edu/abs/2021arXiv210806373W},
	abstract = {The MAMMOTH-Grism slitless spectroscopic survey is a Hubble Space Telescope (HST) cycle-28 medium program, which is obtaining 45 orbits of WFC3/IR grism spectroscopy in the density peak regions of three massive galaxy protoclusters at \$z=2-3\$ discovered using the MAMMOTH technique. We introduce this survey by presenting the first measurement of mass-metallicity relation (MZR) at high redshift in overdense environments via grism spectroscopy. From the completed MAMMOTH-Grism observation in the field of the BOSS1244 protocluster at \$z=2.24{\textbackslash}pm0.02\$, We secure a sample of 36 protocluster member galaxies at \$z{\textbackslash}sim2.24\$, showing strong nebular emission lines ([O III], H\${\textbackslash}beta\$ and [O II]) in their G141 spectra. Using the multi-wavelength broad-band deep imaging from HST and ground-based telescopes, we measure their stellar masses in the range of \$[10{\textasciicircum}\{9\},10{\textasciicircum}\{10.4\}]M\_{\textbackslash}odot\$, instantaneous star formation rates (SFR) from 10 to 240\$M\_{\textbackslash}odot yr{\textasciicircum}\{-1\}\$, and global gas-phase metallicities [1/3,1] of solar. Compared with similarly selected field galaxy sample at the same redshift, our galaxies show on average increased SFRs by {\textasciitilde}0.06dex and {\textasciitilde}0.18dex at {\textasciitilde}10\${\textasciicircum}\{10.1\}M\_{\textbackslash}odot\$ and {\textasciitilde}10\${\textasciicircum}\{9.8\}M\_{\textbackslash}odot\$, respectively. Using the stacked spectra of our sample galaxies, we derive the MZR in the BOSS1244 protocluster core as \$12+{\textbackslash}log(\{{\textbackslash}rm O/H\})=(0.136{\textbackslash}pm0.018){\textbackslash}times{\textbackslash}log(M\_{\textbackslash}ast/M\_{\textbackslash}odot)+(7.082{\textbackslash}pm0.175)\$, showing significantly shallower slope than that in the field. This shallow MZR slope is likely caused by the combined effects of efficient recycling of feedback-driven winds and cold-mode gas accretion in protocluster environments. The former effect helps low-mass galaxies residing in overdensities retain their metal production, whereas the latter effect dilutes the metal content of high-mass galaxies, making them more metal poor than their coeval field counterparts.},
	urldate = {2021-09-07},
	author = {Wang, Xin and Li, Zihao and Cai, Zheng and Shi, Dong Dong and Fan, Xiaohui and Zheng, Xian Zhong and Bian, Fuyan and Teplitz, Harry I. and Alavi, Anahita and Colbert, James W. and Henry, Alaina L. and Malkan, Matthew A.},
	month = aug,
	year = {2021},
	note = {Publication Title: arXiv e-prints
ADS Bibcode: 2021arXiv210806373W
Type: article},
	keywords = {Astrophysics - Astrophysics of Galaxies},
}

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