@article{giertych_shaban_haravu_williams_2024, title={A statistical primer on classical period-finding techniques in astronomy}, volume={87}, ISSN={["1361-6633"]}, url={https://doi.org/10.1088/1361-6633/ad4586}, DOI={10.1088/1361-6633/ad4586}, abstractNote={The aim of our paper is to investigate the properties of the classical phase-dispersion minimization (PDM), analysis of variance (AOV), string-length (SL), and Lomb-Scargle (LS) power statistics from a statistician's perspective. We confirm that when the data are perturbations of a constant function, i.e. under the null hypothesis of no period in the data, a scaled version of the PDM statistic follows a beta distribution, the AOV statistic follows an F distribution, and the LS power follows a chi-squared distribution with two degrees of freedom. However, the SL statistic does not have a closed-form distribution. We further verify these theoretical distributions through simulations and demonstrate that the extreme values of these statistics (over a range of trial periods), often used for period estimation and determination of the false alarm probability (FAP), follow different distributions than those derived for a single period. We emphasize that multiple-testing considerations are needed to correctly derive FAP bounds. Though, in fact, multiple-testing controls are built into the FAP bound for these extreme-value statistics, e.g. the FAP bound derived specifically for the maximum LS power statistic over a range of trial periods. Additionally, we find that all of these methods are robust to heteroscedastic noise aimed to mimic the degradation or miscalibration of an instrument over time. Finally, we examine the ability of these statistics to detect a non-constant periodic function via simulating data that mimics a well-detached binary system, and we find that the AOV statistic has the most power to detect the correct period, which agrees with what has been observed in practice.}, number={7}, journal={REPORTS ON PROGRESS IN PHYSICS}, author={Giertych, Naomi and Shaban, Ahmed and Haravu, Pragya and Williams, Jonathan}, year={2024}, month={Jul} }
 @article{shaban_bordoloi_chisholm_rigby_sharma_sharon_tejos_bayliss_barrientos_lopez_et al._2023, title={Dissecting a 30 kpc galactic outflow at <i>z</i> ∼ 1.7}, volume={526}, ISSN={["1365-2966"]}, url={https://doi.org/10.1093/mnras/stad3004}, DOI={10.1093/mnras/stad3004}, abstractNote={ABSTRACT}, number={4}, journal={MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, author={Shaban, Ahmed and Bordoloi, Rongmon and Chisholm, John and Rigby, Jane R. and Sharma, Soniya and Sharon, Keren and Tejos, Nicolas and Bayliss, Matthew B. and Barrientos, L. Felipe and Lopez, Sebastian and et al.}, year={2023}, month={Oct}, pages={6297–6320} }
 @article{shaban_bordoloi_chisholm_sharma_sharon_rigby_gladders_bayliss_barrientos_lopez_et al._2022, title={A 30 kpc Spatially Extended Clumpy and Asymmetric Galactic Outflow at z similar to 1.7}, volume={936}, ISSN={["1538-4357"]}, url={https://doi.org/10.3847/1538-4357/ac7c65}, DOI={10.3847/1538-4357/ac7c65}, abstractNote={Abstract}, number={1}, journal={ASTROPHYSICAL JOURNAL}, author={Shaban, Ahmed and Bordoloi, Rongmon and Chisholm, John and Sharma, Soniya and Sharon, Keren and Rigby, Jane R. and Gladders, Michael G. and Bayliss, Matthew B. and Barrientos, L. Felipe and Lopez, Sebastian and et al.}, year={2022}, month={Sep} }
 @article{bordoloi_john m. o'meara_sharon_rigby_cooke_shaban_matuszewski_rizzi_doppmann_martin_et al._2022, title={Resolving the H i in damped Lyman alpha systems that power star formation}, volume={5}, ISSN={["1476-4687"]}, url={https://doi.org/10.1038/s41586-022-04616-1}, DOI={10.1038/s41586-022-04616-1}, abstractNote={Reservoirs of dense atomic gas (primarily hydrogen) contain approximately 90 per cent of the neutral gas at a redshift of 3, and contribute to between 2 and 3 per cent of the total baryons in the Universe1-4. These 'damped Lyman α systems'-so called because they absorb Lyman α photons within and from background sources-have been studied for decades, but only through absorption lines present in the spectra of background quasars and γ-ray bursts5-10. Such pencil beams do not constrain the physical extent of the systems. Here we report integral-field spectroscopy of a bright, gravitationally lensed galaxy at a redshift of 2.7 with two foreground damped Lyman α systems. These systems are greater than 238 kiloparsecs squared in extent, with column densities of neutral hydrogen varying by more than an order of magnitude on scales of less than 3 kiloparsecs. The mean column densities are between 1020.46 and 1020.84 centimetres squared and the total masses are greater than 5.5 × 108-1.4 × 109 times the mass of the Sun, showing that they contain the necessary fuel for the next generation of star formation, consistent with relatively massive, low-luminosity primeval galaxies at redshifts greater than 2.}, journal={NATURE}, publisher={Springer Science and Business Media LLC}, author={Bordoloi, Rongmon and John M. O'Meara and Sharon, Keren and Rigby, Jane R. and Cooke, Jeff and Shaban, Ahmed and Matuszewski, Mateusz and Rizzi, Luca and Doppmann, Greg and Martin, D. Christopher and et al.}, year={2022}, month={May} }