%0 Generic %1 trac2021amber %A Trac, Hy %A Chen, Nianyi %A Holst, Ian %A Alvarez, Marcelo A. %A Cen, Renyue %D 2021 %K library %T AMBER: A Semi-Numerical Abundance Matching Box for the Epoch of Reionization %U http://arxiv.org/abs/2109.10375 %X The Abundance Matching Box for the Epoch of Reionization (AMBER) is a semi-numerical code for modeling the cosmic dawn. The new algorithm is not based on the excursion set formalism, but takes the novel approach of calculating the reionization-redshift field $z_re(x)$ assuming that hydrogen gas encountering higher radiation intensity are photoionized earlier. Redshift values are assigned while matching the abundance of ionized mass according to a given mass-weighted ionization fraction $x_i(z)$. The code has the unique advantage of allowing users to directly specify the reionization history through the redshift midpoint $z_mid$, duration $\Delta_z$, and asymmetry $A_z$ input parameters. The reionization process is further controlled through the minimum halo mass $M_min$ for galaxy formation and the radiation mean free path $l_mfp$ for radiative transfer. We implement improved methods for constructing density, velocity, halo, and radiation fields, which are essential components for modeling reionization observables. We compare AMBER with two other semi-numerical methods and find that our code more accurately reproduces the results from radiation-hydrodynamic simulations. The parallelized code is over four orders of magnitude faster than radiative transfer simulations and will efficiently enable large-volume models, full-sky mock observations, and parameter-space studies. AMBER will be made publicly available to facilitate and transform studies of the EoR.

@misc{trac2021amber, abstract = {The Abundance Matching Box for the Epoch of Reionization (AMBER) is a semi-numerical code for modeling the cosmic dawn. The new algorithm is not based on the excursion set formalism, but takes the novel approach of calculating the reionization-redshift field $z_\mathrm{re}(\boldsymbol{x})$ assuming that hydrogen gas encountering higher radiation intensity are photoionized earlier. Redshift values are assigned while matching the abundance of ionized mass according to a given mass-weighted ionization fraction $\bar{x}_\mathrm{i}(z)$. The code has the unique advantage of allowing users to directly specify the reionization history through the redshift midpoint $z_\mathrm{mid}$, duration $\Delta_\mathrm{z}$, and asymmetry $A_\mathrm{z}$ input parameters. The reionization process is further controlled through the minimum halo mass $M_\mathrm{min}$ for galaxy formation and the radiation mean free path $l_\mathrm{mfp}$ for radiative transfer. We implement improved methods for constructing density, velocity, halo, and radiation fields, which are essential components for modeling reionization observables. We compare AMBER with two other semi-numerical methods and find that our code more accurately reproduces the results from radiation-hydrodynamic simulations. The parallelized code is over four orders of magnitude faster than radiative transfer simulations and will efficiently enable large-volume models, full-sky mock observations, and parameter-space studies. AMBER will be made publicly available to facilitate and transform studies of the EoR.}, added-at = {2021-09-23T12:12:29.000+0200}, author = {Trac, Hy and Chen, Nianyi and Holst, Ian and Alvarez, Marcelo A. and Cen, Renyue}, biburl = {https://www.bibsonomy.org/bibtex/21ed459242d19767bd5baa54893945deb/gpkulkarni}, description = {AMBER: A Semi-Numerical Abundance Matching Box for the Epoch of Reionization}, interhash = {cb11294aab563f0813c3cb6bcbadca11}, intrahash = {1ed459242d19767bd5baa54893945deb}, keywords = {library}, note = {cite arxiv:2109.10375Comment: 29 pages, 21 figures, 1 table. Submitted to ApJ. AMBER will be made publicly available when the paper is published}, timestamp = {2021-09-23T12:12:29.000+0200}, title = {AMBER: A Semi-Numerical Abundance Matching Box for the Epoch of Reionization}, url = {http://arxiv.org/abs/2109.10375}, year = 2021 }