ODREÐIVANJE BARIONSKE FUNKCIJE MASE ZA UZORAK BLISKIH GALAKSIJA

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ODREÐIVANJE BARIONSKE FUNKCIJE MASE ZA UZORAK BLISKIH GALAKSIJA

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dc.contributor.advisor Samurović, Srđan
dc.contributor.author Jovanović, Milena
dc.date.accessioned 2021-09-08T15:21:11Z
dc.date.available 2021-09-08T15:21:11Z
dc.date.issued 2021
dc.identifier.uri http://hdl.handle.net/123456789/5244
dc.description.abstract The subject of this thesis is a precise determination of the Baryonic Mass Func- tion (BMF) for a representative sample of nearby galaxies, where BMF stands for the distribution of the galaxies’ baryonic masses. Detailed dynamical models were derived for a sample of galaxies based on the publicly available THINGS (The HI Nearby Galaxy Survey) survey, based on the the 21 cm emission line of atomic hydrogen hi. THINGS rotation curves, that reflect dynamical mass, were fitted by the sum of the contributions from the stellar component, neutral atomic gas, and dark matter for 20 THINGS galaxies. The mass of stellar components is measured from the Spitzer photometry in the 3.6 μm band, while the amount of atomic gas is derived directly from the radio observations in THINGS. For the assumed dark matter dis- tribution we used the observationally motivated pseudo-isothermal profile (ISO) and the Navarro-Frenk-White (NFW) profile based on the ΛCDM cosmological model. Dynamical modeling of the total mass was performed with free scaling of the stellar component contribution (mass-to-light ratio, M/L), and also with the same parameter fixed on a value consistent with stellar evolution population models. Con- vergence of the fitting procedure was reached for all the dynamical models with the free mass-to-light ratio, while the modeling with the fixed ratio was successful for 16 objects. The mass of the stellar component, gas, dark matter, baryonic, and total mass, were derived for the sample of galaxies and the aforementioned four sets of dynamical models (two dark matter models with both free and fixed M/L values). The total BMF is constructed by summing the masses of the baryonic compo- nents (stars and gas) for galaxies in the given range of galactic masses. Furthermore, we discuss how typical our Galactic neighborhood and our Galaxy, the Milky Way, as a giant spiral, are in terms of component masses and their place on the global (and local) BMF. en_US
dc.description.provenance Submitted by Slavisha Milisavljevic (slavisha) on 2021-09-08T15:21:11Z No. of bitstreams: 1 Doktorska_disertacija_Jovanovic_Milena.pdf: 14281907 bytes, checksum: ca4196031e8807fdb682e0abd951852f (MD5) en
dc.description.provenance Made available in DSpace on 2021-09-08T15:21:11Z (GMT). No. of bitstreams: 1 Doktorska_disertacija_Jovanovic_Milena.pdf: 14281907 bytes, checksum: ca4196031e8807fdb682e0abd951852f (MD5) Previous issue date: 2021 en
dc.language.iso sr en_US
dc.publisher Beograd en_US
dc.title ODREÐIVANJE BARIONSKE FUNKCIJE MASE ZA UZORAK BLISKIH GALAKSIJA en_US
mf.author.birth-date 1981-12-27
mf.author.birth-place Niš en_US
mf.author.birth-country Srbija en_US
mf.author.residence-state Srbija en_US
mf.author.citizenship Srpsko en_US
mf.author.nationality Srpkinja en_US
mf.subject.area astrophysics en_US
mf.subject.keywords galaxies: kinematics and dynamics, galaxies: mass function, galaxies: stellar component, dark matter, Galaxy: fundamental parameters en_US
mf.subject.subarea extragalactic astronomy en_US
mf.contributor.committee Ćirković, Milan
mf.contributor.committee Atanacković, Olga
mf.contributor.committee Urošević, Dejan
mf.contributor.committee Ninković, Slobodan
mf.university.faculty Mathematical faculty en_US
mf.document.pages 246 en_US
mf.document.location Beograd en_US
mf.document.genealogy-project No en_US
mf.university Belgrade University en_US

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