@article{qezlou_characterizing_2021,
	title = {Characterizing protoclusters and protogroups at \${\textbackslash}mathrm\{z {\textbackslash}sim 2.5\}\$ using {Lyman}-\${\textbackslash}alpha\$ {Tomography}},
	url = {http://arxiv.org/abs/2112.03930},
	abstract = {Ly-\${\textbackslash}alpha\$ tomography surveys have begun to produce three-dimensional (3D) maps of the intergalactic medium (IGM) opacity at \$z {\textbackslash}sim 2.5\$ with Mpc resolution. These surveys provide an exciting new way to discover and characterize high-redshift overdensities, including the progenitors of today's massive groups and clusters of galaxies, known as protogroups and protoclusters. We use the IllustrisTNG-\$300\$ hydrodynamical simulation to build mock maps that realistically mimic those observed in the Ly-\${\textbackslash}alpha\$ Tomographic IMACS Survey (LATIS). We introduce a novel method for delineating the boundaries of structures detected in 3D Ly-\${\textbackslash}alpha\$ flux maps by applying the watershed algorithm. We provide estimators for the dark matter masses of these structures (at \$z{\textbackslash}sim2.5\$), their descendant halo masses at \$z=0\$, and the corresponding uncertainties. We also investigate the completeness of this method for the detection of protogroups and protoclusters. Compared to earlier work, we apply and characterize our method over a wider mass range that extends to massive protogroups. We also assess the widely used fluctuating Gunn-Peterson approximation (FGPA) applied to dark-matter-only simulations; we conclude while it is adequate for estimating the Ly-\${\textbackslash}alpha\$ absorption signal from moderate-to-massive protoclusters (\${\textbackslash}gtrsim 10{\textasciicircum}\{14.2\} {\textbackslash} h{\textasciicircum}\{-1\} M\_\{{\textbackslash}odot\}\$), it artificially merges a minority of lower-mass structures with more massive neighbors. Our methods will be applied to current and future Ly-\${\textbackslash}alpha\$ tomography surveys to create catalogs of overdensities and study environment-dependent galaxy evolution in the Cosmic Noon era.},
	urldate = {2021-12-17},
	journal = {arXiv:2112.03930 [astro-ph]},
	author = {Qezlou, Mahdi and Newman, Andrew B. and Rudie, Gwen C. and Bird, Simeon},
	month = dec,
	year = {2021},
	note = {arXiv: 2112.03930},
	keywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},
}

{"_id":"qb6zrKpu2B5yKShzb","bibbaseid":"qezlou-newman-rudie-bird-characterizingprotoclustersandprotogroupsattextbackslashmathrmztextbackslashsim25usinglymantextbackslashalphatomography-2021","author_short":["Qezlou, M.","Newman, A. B.","Rudie, G. C.","Bird, S."],"bibdata":{"bibtype":"article","type":"article","title":"Characterizing protoclusters and protogroups at \\${\\textbackslash}mathrm\\{z {\\textbackslash}sim 2.5\\}\\$ using Lyman-\\${\\textbackslash}alpha\\$ Tomography","url":"http://arxiv.org/abs/2112.03930","abstract":"Ly-\\${\\textbackslash}alpha\\$ tomography surveys have begun to produce three-dimensional (3D) maps of the intergalactic medium (IGM) opacity at \\$z {\\textbackslash}sim 2.5\\$ with Mpc resolution. These surveys provide an exciting new way to discover and characterize high-redshift overdensities, including the progenitors of today's massive groups and clusters of galaxies, known as protogroups and protoclusters. We use the IllustrisTNG-\\$300\\$ hydrodynamical simulation to build mock maps that realistically mimic those observed in the Ly-\\${\\textbackslash}alpha\\$ Tomographic IMACS Survey (LATIS). We introduce a novel method for delineating the boundaries of structures detected in 3D Ly-\\${\\textbackslash}alpha\\$ flux maps by applying the watershed algorithm. We provide estimators for the dark matter masses of these structures (at \\$z{\\textbackslash}sim2.5\\$), their descendant halo masses at \\$z=0\\$, and the corresponding uncertainties. We also investigate the completeness of this method for the detection of protogroups and protoclusters. Compared to earlier work, we apply and characterize our method over a wider mass range that extends to massive protogroups. We also assess the widely used fluctuating Gunn-Peterson approximation (FGPA) applied to dark-matter-only simulations; we conclude while it is adequate for estimating the Ly-\\${\\textbackslash}alpha\\$ absorption signal from moderate-to-massive protoclusters (\\${\\textbackslash}gtrsim 10{\\textasciicircum}\\{14.2\\} {\\textbackslash} h{\\textasciicircum}\\{-1\\} M_\\{{\\textbackslash}odot\\}\\$), it artificially merges a minority of lower-mass structures with more massive neighbors. Our methods will be applied to current and future Ly-\\${\\textbackslash}alpha\\$ tomography surveys to create catalogs of overdensities and study environment-dependent galaxy evolution in the Cosmic Noon era.","urldate":"2021-12-17","journal":"arXiv:2112.03930 [astro-ph]","author":[{"propositions":[],"lastnames":["Qezlou"],"firstnames":["Mahdi"],"suffixes":[]},{"propositions":[],"lastnames":["Newman"],"firstnames":["Andrew","B."],"suffixes":[]},{"propositions":[],"lastnames":["Rudie"],"firstnames":["Gwen","C."],"suffixes":[]},{"propositions":[],"lastnames":["Bird"],"firstnames":["Simeon"],"suffixes":[]}],"month":"December","year":"2021","note":"arXiv: 2112.03930","keywords":"Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics","bibtex":"@article{qezlou_characterizing_2021,\n\ttitle = {Characterizing protoclusters and protogroups at \\${\\textbackslash}mathrm\\{z {\\textbackslash}sim 2.5\\}\\$ using {Lyman}-\\${\\textbackslash}alpha\\$ {Tomography}},\n\turl = {http://arxiv.org/abs/2112.03930},\n\tabstract = {Ly-\\${\\textbackslash}alpha\\$ tomography surveys have begun to produce three-dimensional (3D) maps of the intergalactic medium (IGM) opacity at \\$z {\\textbackslash}sim 2.5\\$ with Mpc resolution. These surveys provide an exciting new way to discover and characterize high-redshift overdensities, including the progenitors of today's massive groups and clusters of galaxies, known as protogroups and protoclusters. We use the IllustrisTNG-\\$300\\$ hydrodynamical simulation to build mock maps that realistically mimic those observed in the Ly-\\${\\textbackslash}alpha\\$ Tomographic IMACS Survey (LATIS). We introduce a novel method for delineating the boundaries of structures detected in 3D Ly-\\${\\textbackslash}alpha\\$ flux maps by applying the watershed algorithm. We provide estimators for the dark matter masses of these structures (at \\$z{\\textbackslash}sim2.5\\$), their descendant halo masses at \\$z=0\\$, and the corresponding uncertainties. We also investigate the completeness of this method for the detection of protogroups and protoclusters. Compared to earlier work, we apply and characterize our method over a wider mass range that extends to massive protogroups. We also assess the widely used fluctuating Gunn-Peterson approximation (FGPA) applied to dark-matter-only simulations; we conclude while it is adequate for estimating the Ly-\\${\\textbackslash}alpha\\$ absorption signal from moderate-to-massive protoclusters (\\${\\textbackslash}gtrsim 10{\\textasciicircum}\\{14.2\\} {\\textbackslash} h{\\textasciicircum}\\{-1\\} M\\_\\{{\\textbackslash}odot\\}\\$), it artificially merges a minority of lower-mass structures with more massive neighbors. Our methods will be applied to current and future Ly-\\${\\textbackslash}alpha\\$ tomography surveys to create catalogs of overdensities and study environment-dependent galaxy evolution in the Cosmic Noon era.},\n\turldate = {2021-12-17},\n\tjournal = {arXiv:2112.03930 [astro-ph]},\n\tauthor = {Qezlou, Mahdi and Newman, Andrew B. and Rudie, Gwen C. and Bird, Simeon},\n\tmonth = dec,\n\tyear = {2021},\n\tnote = {arXiv: 2112.03930},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},\n}\n\n","author_short":["Qezlou, M.","Newman, A. B.","Rudie, G. C.","Bird, S."],"key":"qezlou_characterizing_2021","id":"qezlou_characterizing_2021","bibbaseid":"qezlou-newman-rudie-bird-characterizingprotoclustersandprotogroupsattextbackslashmathrmztextbackslashsim25usinglymantextbackslashalphatomography-2021","role":"author","urls":{"Paper":"http://arxiv.org/abs/2112.03930"},"keyword":["Astrophysics - Astrophysics of Galaxies","Astrophysics - Cosmology and Nongalactic Astrophysics"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies","astrophysics - cosmology and nongalactic astrophysics"],"search_terms":["characterizing","protoclusters","protogroups","textbackslash","mathrm","textbackslash","sim","using","lyman","textbackslash","alpha","tomography","qezlou","newman","rudie","bird"],"title":"Characterizing protoclusters and protogroups at \\${\\textbackslash}mathrm\\{z {\\textbackslash}sim 2.5\\}\\$ using Lyman-\\${\\textbackslash}alpha\\$ Tomography","year":2021}