MOND prediction of a new giant shell in the elliptical galaxy NGC 3923

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F14%3A00076851" target="_blank" >RIV/00216224:14310/14:00076851 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985815:_____/14:00434216

Výsledek na webu

<a href="http://adsabs.harvard.edu/abs/2014A%26A...566A.151B" target="_blank" >http://adsabs.harvard.edu/abs/2014A%26A...566A.151B</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201423935" target="_blank" >10.1051/0004-6361/201423935</a>

Jazyk výsledku

angličtina

Název v původním jazyce

MOND prediction of a new giant shell in the elliptical galaxy NGC 3923

Popis výsledku v původním jazyce

Context. Stellar shells, which form axially symmetric systems of arcs in some elliptical galaxies, are most likely remnants of radial minor mergers. They are observed up a radius of similar to 100 kpc. The stars in them oscillate in radial orbits. The radius of a shell depends on the free-fall time at the position of the shell and on the time since the merger. We previously verified the consistency of shell radii in the elliptical galaxy NGC 3923 with its most probable MOND potential. Our results implied that an as yet undiscovered shell exists at the outskirts of the galaxy. Aims. 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. Methods. Wetested 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.

Název v anglickém jazyce

MOND prediction of a new giant shell in the elliptical galaxy NGC 3923

Popis výsledku anglicky

Context. Stellar shells, which form axially symmetric systems of arcs in some elliptical galaxies, are most likely remnants of radial minor mergers. They are observed up a radius of similar to 100 kpc. The stars in them oscillate in radial orbits. The radius of a shell depends on the free-fall time at the position of the shell and on the time since the merger. We previously verified the consistency of shell radii in the elliptical galaxy NGC 3923 with its most probable MOND potential. Our results implied that an as yet undiscovered shell exists at the outskirts of the galaxy. Aims. 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. Methods. Wetested 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ASTRONOMY & ASTROPHYSICS

ISSN

0004-6361

e-ISSN

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Svazek periodika

566

Číslo periodika v rámci svazku

JUNE

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

11

Strana od-do

"nestránkováno"

Kód UT WoS článku

000338681500154

EID výsledku v databázi Scopus

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