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MOND prediction of a new giant shell in the elliptical galaxy NGC 3923
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SYSNO ASEP 0434216 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název MOND prediction of a new giant shell in the elliptical galaxy NGC 3923 Tvůrce(i) Bílek, Michal (ASU-R) ORCID
Bartošková, Kateřina (ASU-R)
Ebrová, Ivana (ASU-R)
Jungwiert, Bruno (ASU-R) ORCID, RIDZdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 566, June (2014), A151/1-A151/11Poč.str. 11 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova gravitation ; galaxies: kinematics and dynamics ; galaxies: formation Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Institucionální podpora ASU-R - RVO:67985815 UT WOS 000338681500154 DOI 10.1051/0004-6361/201423935 Anotace We here extend our study by assuming more general models for the gravitational potential to verify the prediction of the new shell and to estimate its position. We tested the consistency of the shell radial distribution observed in NGC 3923 with a wide variety of MOND potentials of the galaxy. The potentials differed in the mass-to-light ratio and in distance to the galaxy. We considered different MOND interpolation functions, values of the acceleration constant a(0), and density profiles of the galaxy. We verified the functionality of our code on a Newtonian self-consistent simulation of the formation of a shell galaxy. Our method reliably predicts that exactly one new outermost shell exists at a galactocentric radius of about 1900 '' (similar to 210 kpc) on the southwestern side of the galaxy. Its estimated surface brightness is about 28 mag arcsec(-2) in B - a value accessible by current instruments. This prediction enables a rare test of MOND in an elliptical down to an acceleration of a(0)/10. The predictive power of our method is verified by reconstructing the position of the largest known shell from the distribution of the remaining shells. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2015
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