@article{miller_searching_2019,
	title = {Searching for the shadows of giants: characterising protoclusters with line of sight {Lyman}-\{{\textbackslash}alpha\} absorption},
	volume = {1909},
	shorttitle = {Searching for the shadows of giants},
	url = {http://adsabs.harvard.edu/abs/2019arXiv190902513M},
	abstract = {We use state of the art hydrodyamical simulations from the Sherwood, 
EAGLE and Illustris projects to examine the signature of \$M\_\{\vphantom{\}}{\textbackslash}rm
z=0\vphantom{\{}\}{\textbackslash}simeq 10{\textasciicircum}\{14\}M\_\{{\textbackslash}odot\}\$ protoclusters observed in Ly-\${\textbackslash}alpha\$
absorption at \$z{\textbackslash}simeq 2.4\$. We find there is a weak correlation between
the mass overdensity, \${\textbackslash}delta\_\{{\textbackslash}rm m\}\$, and the Ly-\${\textbackslash}alpha\$ effective
optical depth relative to the mean, \${\textbackslash}delta\_\{{\textbackslash}tau\_{\textbackslash}textrm\{eff\}\}\$,
averaged over \$15{\textasciitilde}h{\textasciicircum}\{-1\}{\textbackslash}rm{\textbackslash},cMpc\$ scales, although scatter in the
\${\textbackslash}delta\_\{{\textbackslash}rm m\}\$--\${\textbackslash}delta\_\{{\textbackslash}tau\_{\textbackslash}textrm\{eff\}\}\$ plane means it is not
possible to uniquely identify large scale overdensities with strong
Ly-\${\textbackslash}alpha\$ absorption. Although all protoclusters are associated with
large scale mass overdensities, most sight lines through protoclusters
in a \${\textbackslash}sim 10{\textasciicircum}\{6\}\$ \${\textbackslash}rm cMpc{\textasciicircum}\{3\}\$ volume probe the low column density
Ly-\${\textbackslash}alpha\$ forest. A small subset of sight lines that pass through
protoclusters exhibit coherent, strong Ly-\${\textbackslash}alpha\$ absorption on
\$15h{\textasciicircum}\{-1\}{\textbackslash}rm{\textbackslash},cMpc\$ scales, although these correspond to a wide range in
mass overdensity. Assuming perfect removal of contamination by
Ly-\${\textbackslash}alpha\$ absorbers with damping wings, more than half of the
remaining sight lines with \${\textbackslash}delta\_\{{\textbackslash}tau\_\{{\textbackslash}rm eff\}\}{\textgreater}3.5\$ trace
protoclusters. It is furthermore possible to identify a model dependent
\${\textbackslash}delta\_\{{\textbackslash}tau\_\{{\textbackslash}rm eff\}\}\$ threshold that selects only protoclusters.
However, such regions are rare: excluding absorption caused by damped
systems, less than 0.1 per cent of sight lines that pass through a
protocluster have \${\textbackslash}delta\_\{{\textbackslash}tau\_\{{\textbackslash}rm eff\}\}{\textgreater}3.5\$, meaning that any
protocluster sample selected in this manner will also be highly
incomplete. On the other hand, coherent regions of Ly-\${\textbackslash}alpha\$
absorption also provide a promising route for identifying and studying
filamentary environments at high redshift.},
	urldate = {2019-09-09},
	journal = {arXiv e-prints},
	author = {Miller, Joel S. A. and Bolton, James S. and Hatch, Nina},
	month = sep,
	year = {2019},
	keywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},
	pages = {arXiv:1909.02513},
}

{"_id":"4Lxj8K2jqGumA8t9n","bibbaseid":"miller-bolton-hatch-searchingfortheshadowsofgiantscharacterisingprotoclusterswithlineofsightlymantextbackslashalphaabsorption-2019","author_short":["Miller, J. S. A.","Bolton, J. S.","Hatch, N."],"bibdata":{"bibtype":"article","type":"article","title":"Searching for the shadows of giants: characterising protoclusters with line of sight Lyman-\\\\textbackslashalpha\\ absorption","volume":"1909","shorttitle":"Searching for the shadows of giants","url":"http://adsabs.harvard.edu/abs/2019arXiv190902513M","abstract":"We use state of the art hydrodyamical simulations from the Sherwood, EAGLE and Illustris projects to examine the signature of \\$M_\\{p̌hantom{\\}}{\\textbackslash}rm z=0p̌hantom{\\{}\\}{\\textbackslash}simeq 10{\\textasciicircum}\\{14\\}M_\\{{\\textbackslash}odot\\}\\$ protoclusters observed in Ly-\\${\\textbackslash}alpha\\$ absorption at \\$z{\\textbackslash}simeq 2.4\\$. We find there is a weak correlation between the mass overdensity, \\${\\textbackslash}delta_\\{{\\textbackslash}rm m\\}\\$, and the Ly-\\${\\textbackslash}alpha\\$ effective optical depth relative to the mean, \\${\\textbackslash}delta_\\{{\\textbackslash}tau_{\\textbackslash}textrm\\{eff\\}\\}\\$, averaged over \\$15{\\textasciitilde}h{\\textasciicircum}\\{-1\\}{\\textbackslash}rm{\\textbackslash},cMpc\\$ scales, although scatter in the \\${\\textbackslash}delta_\\{{\\textbackslash}rm m\\}\\$–\\${\\textbackslash}delta_\\{{\\textbackslash}tau_{\\textbackslash}textrm\\{eff\\}\\}\\$ plane means it is not possible to uniquely identify large scale overdensities with strong Ly-\\${\\textbackslash}alpha\\$ absorption. Although all protoclusters are associated with large scale mass overdensities, most sight lines through protoclusters in a \\${\\textbackslash}sim 10{\\textasciicircum}\\{6\\}\\$ \\${\\textbackslash}rm cMpc{\\textasciicircum}\\{3\\}\\$ volume probe the low column density Ly-\\${\\textbackslash}alpha\\$ forest. A small subset of sight lines that pass through protoclusters exhibit coherent, strong Ly-\\${\\textbackslash}alpha\\$ absorption on \\$15h{\\textasciicircum}\\{-1\\}{\\textbackslash}rm{\\textbackslash},cMpc\\$ scales, although these correspond to a wide range in mass overdensity. Assuming perfect removal of contamination by Ly-\\${\\textbackslash}alpha\\$ absorbers with damping wings, more than half of the remaining sight lines with \\${\\textbackslash}delta_\\{{\\textbackslash}tau_\\{{\\textbackslash}rm eff\\}\\}{\\textgreater}3.5\\$ trace protoclusters. It is furthermore possible to identify a model dependent \\${\\textbackslash}delta_\\{{\\textbackslash}tau_\\{{\\textbackslash}rm eff\\}\\}\\$ threshold that selects only protoclusters. However, such regions are rare: excluding absorption caused by damped systems, less than 0.1 per cent of sight lines that pass through a protocluster have \\${\\textbackslash}delta_\\{{\\textbackslash}tau_\\{{\\textbackslash}rm eff\\}\\}{\\textgreater}3.5\\$, meaning that any protocluster sample selected in this manner will also be highly incomplete. On the other hand, coherent regions of Ly-\\${\\textbackslash}alpha\\$ absorption also provide a promising route for identifying and studying filamentary environments at high redshift.","urldate":"2019-09-09","journal":"arXiv e-prints","author":[{"propositions":[],"lastnames":["Miller"],"firstnames":["Joel","S.","A."],"suffixes":[]},{"propositions":[],"lastnames":["Bolton"],"firstnames":["James","S."],"suffixes":[]},{"propositions":[],"lastnames":["Hatch"],"firstnames":["Nina"],"suffixes":[]}],"month":"September","year":"2019","keywords":"Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics","pages":"arXiv:1909.02513","bibtex":"@article{miller_searching_2019,\n\ttitle = {Searching for the shadows of giants: characterising protoclusters with line of sight {Lyman}-\\{{\\textbackslash}alpha\\} absorption},\n\tvolume = {1909},\n\tshorttitle = {Searching for the shadows of giants},\n\turl = {http://adsabs.harvard.edu/abs/2019arXiv190902513M},\n\tabstract = {We use state of the art hydrodyamical simulations from the Sherwood, \nEAGLE and Illustris projects to examine the signature of \\$M\\_\\{\\vphantom{\\}}{\\textbackslash}rm\nz=0\\vphantom{\\{}\\}{\\textbackslash}simeq 10{\\textasciicircum}\\{14\\}M\\_\\{{\\textbackslash}odot\\}\\$ protoclusters observed in Ly-\\${\\textbackslash}alpha\\$\nabsorption at \\$z{\\textbackslash}simeq 2.4\\$. We find there is a weak correlation between\nthe mass overdensity, \\${\\textbackslash}delta\\_\\{{\\textbackslash}rm m\\}\\$, and the Ly-\\${\\textbackslash}alpha\\$ effective\noptical depth relative to the mean, \\${\\textbackslash}delta\\_\\{{\\textbackslash}tau\\_{\\textbackslash}textrm\\{eff\\}\\}\\$,\naveraged over \\$15{\\textasciitilde}h{\\textasciicircum}\\{-1\\}{\\textbackslash}rm{\\textbackslash},cMpc\\$ scales, although scatter in the\n\\${\\textbackslash}delta\\_\\{{\\textbackslash}rm m\\}\\$--\\${\\textbackslash}delta\\_\\{{\\textbackslash}tau\\_{\\textbackslash}textrm\\{eff\\}\\}\\$ plane means it is not\npossible to uniquely identify large scale overdensities with strong\nLy-\\${\\textbackslash}alpha\\$ absorption. Although all protoclusters are associated with\nlarge scale mass overdensities, most sight lines through protoclusters\nin a \\${\\textbackslash}sim 10{\\textasciicircum}\\{6\\}\\$ \\${\\textbackslash}rm cMpc{\\textasciicircum}\\{3\\}\\$ volume probe the low column density\nLy-\\${\\textbackslash}alpha\\$ forest. A small subset of sight lines that pass through\nprotoclusters exhibit coherent, strong Ly-\\${\\textbackslash}alpha\\$ absorption on\n\\$15h{\\textasciicircum}\\{-1\\}{\\textbackslash}rm{\\textbackslash},cMpc\\$ scales, although these correspond to a wide range in\nmass overdensity. Assuming perfect removal of contamination by\nLy-\\${\\textbackslash}alpha\\$ absorbers with damping wings, more than half of the\nremaining sight lines with \\${\\textbackslash}delta\\_\\{{\\textbackslash}tau\\_\\{{\\textbackslash}rm eff\\}\\}{\\textgreater}3.5\\$ trace\nprotoclusters. It is furthermore possible to identify a model dependent\n\\${\\textbackslash}delta\\_\\{{\\textbackslash}tau\\_\\{{\\textbackslash}rm eff\\}\\}\\$ threshold that selects only protoclusters.\nHowever, such regions are rare: excluding absorption caused by damped\nsystems, less than 0.1 per cent of sight lines that pass through a\nprotocluster have \\${\\textbackslash}delta\\_\\{{\\textbackslash}tau\\_\\{{\\textbackslash}rm eff\\}\\}{\\textgreater}3.5\\$, meaning that any\nprotocluster sample selected in this manner will also be highly\nincomplete. On the other hand, coherent regions of Ly-\\${\\textbackslash}alpha\\$\nabsorption also provide a promising route for identifying and studying\nfilamentary environments at high redshift.},\n\turldate = {2019-09-09},\n\tjournal = {arXiv e-prints},\n\tauthor = {Miller, Joel S. A. and Bolton, James S. and Hatch, Nina},\n\tmonth = sep,\n\tyear = {2019},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},\n\tpages = {arXiv:1909.02513},\n}\n\n","author_short":["Miller, J. S. A.","Bolton, J. S.","Hatch, N."],"key":"miller_searching_2019","id":"miller_searching_2019","bibbaseid":"miller-bolton-hatch-searchingfortheshadowsofgiantscharacterisingprotoclusterswithlineofsightlymantextbackslashalphaabsorption-2019","role":"author","urls":{"Paper":"http://adsabs.harvard.edu/abs/2019arXiv190902513M"},"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":["searching","shadows","giants","characterising","protoclusters","line","sight","lyman","textbackslashalpha","absorption","miller","bolton","hatch"],"title":"Searching for the shadows of giants: characterising protoclusters with line of sight Lyman-\\\\textbackslashalpha\\ absorption","year":2019}