diff --git a/joss-paper/2dps.png:Zone.Identifier b/joss-paper/2dps.png:Zone.Identifier new file mode 100644 index 0000000..b6cf92b --- /dev/null +++ b/joss-paper/2dps.png:Zone.Identifier @@ -0,0 +1,4 @@ +[ZoneTransfer] +ZoneId=3 +ReferrerUrl=https://21cmsense.readthedocs.io/en/latest/tutorials/understanding_21cmsense.html +HostUrl=https://21cmsense.readthedocs.io/en/latest/_images/tutorials_understanding_21cmsense_75_0.png diff --git a/joss-paper/paper.bib b/joss-paper/paper.bib index 1480bec..426dde2 100644 --- a/joss-paper/paper.bib +++ b/joss-paper/paper.bib @@ -299,3 +299,41 @@ @ARTICLE{Schosser2024 adsurl = {https://ui.adsabs.harvard.edu/abs/2024arXiv240104174S}, adsnote = {Provided by the SAO/NASA Astrophysics Data System} } + +@ARTICLE{Liu2020, + author = {{Liu}, Adrian and {Shaw}, J. Richard}, + title = "{Data Analysis for Precision 21 cm Cosmology}", + journal = {\pasp}, + keywords = {dark ages, reionization, first stars, methods: statistical, techniques: interferometric, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics}, + year = 2020, + month = jun, + volume = {132}, + number = {1012}, + eid = {062001}, + pages = {062001}, + doi = {10.1088/1538-3873/ab5bfd}, +archivePrefix = {arXiv}, + eprint = {1907.08211}, + primaryClass = {astro-ph.IM}, + adsurl = {https://ui.adsabs.harvard.edu/abs/2020PASP..132f2001L}, + adsnote = {Provided by the SAO/NASA Astrophysics Data System} +} + +@ARTICLE{jwst, + author = {{Castellano}, Marco and {Fontana}, Adriano and {Treu}, Tommaso and {Santini}, Paola and {Merlin}, Emiliano and {Leethochawalit}, Nicha and {Trenti}, Michele and {Vanzella}, Eros and {Mestric}, Uros and {Bonchi}, Andrea and {Belfiori}, Davide and {Nonino}, Mario and {Paris}, Diego and {Polenta}, Gianluca and {Roberts-Borsani}, Guido and {Boyett}, Kristan and {Brada{\v{c}}}, Maru{\v{s}}a and {Calabr{\`o}}, Antonello and {Glazebrook}, Karl and {Grillo}, Claudio and {Mascia}, Sara and {Mason}, Charlotte and {Mercurio}, Amata and {Morishita}, Takahiro and {Nanayakkara}, Themiya and {Pentericci}, Laura and {Rosati}, Piero and {Vulcani}, Benedetta and {Wang}, Xin and {Yang}, Lilan}, + title = "{Early Results from GLASS-JWST. III. Galaxy Candidates at z 9-15}", + journal = {\apjl}, + keywords = {Reionization, 1383, Astrophysics - Astrophysics of Galaxies}, + year = 2022, + month = oct, + volume = {938}, + number = {2}, + eid = {L15}, + pages = {L15}, + doi = {10.3847/2041-8213/ac94d0}, +archivePrefix = {arXiv}, + eprint = {2207.09436}, + primaryClass = {astro-ph.GA}, + adsurl = {https://ui.adsabs.harvard.edu/abs/2022ApJ...938L..15C}, + adsnote = {Provided by the SAO/NASA Astrophysics Data System} +} diff --git a/joss-paper/paper.md b/joss-paper/paper.md index a20c099..1c631b9 100644 --- a/joss-paper/paper.md +++ b/joss-paper/paper.md @@ -31,9 +31,16 @@ bibliography: paper.bib # Summary The 21cm line of neutral hydrogen is a powerful probe of the high-redshift -universe, and is the subject of a number of current and upcoming +universe (Cosmic Dawn and the Epoch of Reionization), with an unprecedented potential to +inform us about key processes of early galaxy formation, the first stars and even +cosmology and structure formation [@Liu2020], via intensity mapping. +It is the subject of a number of current and upcoming low-frequency radio experiments, including the MWA [@mwa], LOFAR [@lofar], HERA [@hera] -and the SKA [@Pritchard2015]. +and the SKA [@Pritchard2015], which complement the detailed information concerning the +brightest sources in these early epochs from powerful optical and near-infrared telescopes +such as the JWST [@jwst]. + + 21cmSense is a Python package that provides a modular framework for calculating the sensitivity of these experiments, in order to enhance the process of their design. This paper presents version v2.0.0 of 21cmSense, which has been re-written from the ground up @@ -48,14 +55,14 @@ key assumptions to accelerate the calculation: 1. Each baseline (pair of antennas) in the interferometer intrinsically measures a dense blob of 2D spatial Fourier modes of the sky intensity distribution, centred at a - particular Fourier coordinate *(u,v)* given by the displacement vector between the - antennas forming the baseline, and covering an area in this *(u,v)*-space that is given + particular Fourier coordinate $(u,v)$ given by the displacement vector between the + antennas forming the baseline, and covering an area in this $(u,v)$-space that is given by the Fourier-transform of the primary beam of the instrument. The Fourier-space representation of the sky is thus - built up by collecting many baselines that cover the so-called "*(u,v)*-plane". + built up by collecting many baselines that cover the so-called "$(u,v)$-plane". ``21cmSense`` approximates this process of synthesising many baselines by - nearest-grid-point interpolation onto a regular grid in the *(u,v)*-plane. - Furthermore, importantly the *(u,v)*-grid is chosen to have cells that are comparable + nearest-grid-point interpolation onto a regular grid in the $(u,v)$-plane. + Furthermore, importantly the $(u,v)$-grid is chosen to have cells that are comparable to the instrument's Fourier-space beam size, so that a particular baseline essentially measures a single cell in the grid, and no more. This maximizes resolution while keeping the covariance between cells small. @@ -86,7 +93,17 @@ Some of the key new features introduced in this version of 21cmSense include: 7. Built-in profiles for several major experiments: MWA, HERA and SKA-1. These can be used as-is, or as a starting point for defining a custom instrument. +An example of the predicted sensitivity of the HERA experiment after a year's observation +at $z=8.5$ is shown in Figure \ref{sense}, corresponding to the sampling of the $(u,v)$-grid +shown in Figure \ref{uvsampling}. The sensivity here is a signal-to-noise, +assuming a signal magnitude computed using a semi-numerical model from the 21cmFAST +code [@21cmfast], using parameters from [@Munoz22]. +This figure also demonstrates that the new +21cmSense is capable of producing sensitivity predictions in the cylindrically-averaged +2D power spectrum space, which is helpful for upcoming experiments. +![Sampling of the $(u,v)$-plane for the HERA experiment during a full year of observations.]{label="uvsampling"}(uv-sampling.png) +![Predicted sensitivity of 1000 hours (one year) of HERA observations, as a function of perpendicular and line-of-sight fourier scale. The sensitivity is represented as the signal-to-noise on each $k$-mode, assuming a particular astrophysical model.]{label="sense"}(2dps.png) # Statement of need diff --git a/joss-paper/uv-sampling.png:Zone.Identifier b/joss-paper/uv-sampling.png:Zone.Identifier new file mode 100644 index 0000000..77c2b8a --- /dev/null +++ b/joss-paper/uv-sampling.png:Zone.Identifier @@ -0,0 +1,4 @@ +[ZoneTransfer] +ZoneId=3 +ReferrerUrl=https://21cmsense.readthedocs.io/en/latest/tutorials/getting_started.html +HostUrl=https://21cmsense.readthedocs.io/en/latest/_images/tutorials_getting_started_51_1.png