Prateek Boga, Adhitya Shreyas Sripennem, Amaria Navis Bonsi
{"title":"Rotational curves decomposition of spiral galaxies using least square non-linear regression","authors":"Prateek Boga, Adhitya Shreyas Sripennem, Amaria Navis Bonsi","doi":"10.1007/s12648-023-02655-6","DOIUrl":null,"url":null,"abstract":"<div><p>Dark Matter mass distribution is studied in a Cold Dark Matter Universe using Navarro–Frenk–White density profile for Dark Matter (DM) in spiral galaxies. An equation for a complete rotation curve (RC) is obtained by combining the individual RC equations for the bulge, disk and DM halo. The equation is further used for fitting and decomposition of the RCs of 34 spiral galaxies using a Least Square non-linear algorithm in MATLAB. The free parameters’ values are recorded, <span>\\(\\chi ^2\\)</span> values and masses of each component are calculated. 32 of 34 galaxies yield a <span>\\(\\chi ^2\\)</span> value between 1 and 2 validating the algorithm for the purpose of RC decomposition and the exceptions are discussed. We also present the rotational velocity dataset for the bulge, disk and DM halo for all galaxies (https://adhitya-spas.github.io/Database/).</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 9","pages":"2577 - 2590"},"PeriodicalIF":1.6000,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s12648-023-02655-6","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Dark Matter mass distribution is studied in a Cold Dark Matter Universe using Navarro–Frenk–White density profile for Dark Matter (DM) in spiral galaxies. An equation for a complete rotation curve (RC) is obtained by combining the individual RC equations for the bulge, disk and DM halo. The equation is further used for fitting and decomposition of the RCs of 34 spiral galaxies using a Least Square non-linear algorithm in MATLAB. The free parameters’ values are recorded, \(\chi ^2\) values and masses of each component are calculated. 32 of 34 galaxies yield a \(\chi ^2\) value between 1 and 2 validating the algorithm for the purpose of RC decomposition and the exceptions are discussed. We also present the rotational velocity dataset for the bulge, disk and DM halo for all galaxies (https://adhitya-spas.github.io/Database/).
期刊介绍：
Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
