Effect of the environment on the fundamental plane of elliptical galaxies

EA Evstigneeva, VP Reshetnikov, NY Sotnikova

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

We present an analysis of the location of interacting E/S0 galaxies on the Fundamental Plane (FP). Using the NEMO package, we performed N-body simulations of close encounters and mergers of two self-gravitating spherical galaxies. Two models for encounting galaxies - Plummer's and Hernquist's - were used. The number of particles ranged from 20 000 to 50 000 per galaxy. The changes of central density, half-mass radius and central velocity dispersion were analysed. It was found that close encounters between galaxies alter noticeably the above parameters within a very short time interval (10(7)-10(8) years) just before the final merger. The amplitudes of parameter changes strongly depend on the initial mass concentration of a model. In some experiments we considered an encounter of two spherical galaxies with dark matter components. The effect of parameter changes was less pronounced than for the experiments without a dark halo. The results of the simulations were used to discuss the FP for interacting early-type galaxies.

Original languageEnglish
Pages (from-to)6-12
Number of pages7
JournalASTRONOMY & ASTROPHYSICS
Volume381
Issue number1
DOIs
StatePublished - Jan 2002

Keywords

  • galaxies : kinematics and dynamics
  • techniques : photometric
  • KINEMATICAL DATA
  • BINARY GALAXIES
  • COMPACT-GROUPS
  • ORIGINS
  • CLUES

Cite this

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title = "Effect of the environment on the fundamental plane of elliptical galaxies",
abstract = "We present an analysis of the location of interacting E/S0 galaxies on the Fundamental Plane (FP). Using the NEMO package, we performed N-body simulations of close encounters and mergers of two self-gravitating spherical galaxies. Two models for encounting galaxies - Plummer's and Hernquist's - were used. The number of particles ranged from 20 000 to 50 000 per galaxy. The changes of central density, half-mass radius and central velocity dispersion were analysed. It was found that close encounters between galaxies alter noticeably the above parameters within a very short time interval (10(7)-10(8) years) just before the final merger. The amplitudes of parameter changes strongly depend on the initial mass concentration of a model. In some experiments we considered an encounter of two spherical galaxies with dark matter components. The effect of parameter changes was less pronounced than for the experiments without a dark halo. The results of the simulations were used to discuss the FP for interacting early-type galaxies.",
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author = "EA Evstigneeva and VP Reshetnikov and NY Sotnikova",
year = "2002",
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doi = "10.1051/0004-6361:20011379",
language = "Английский",
volume = "381",
pages = "6--12",
journal = "ASTRONOMY & ASTROPHYSICS",
issn = "0004-6361",
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Effect of the environment on the fundamental plane of elliptical galaxies. / Evstigneeva, EA; Reshetnikov, VP; Sotnikova, NY.

In: ASTRONOMY & ASTROPHYSICS, Vol. 381, No. 1, 01.2002, p. 6-12.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Effect of the environment on the fundamental plane of elliptical galaxies

AU - Evstigneeva, EA

AU - Reshetnikov, VP

AU - Sotnikova, NY

PY - 2002/1

Y1 - 2002/1

N2 - We present an analysis of the location of interacting E/S0 galaxies on the Fundamental Plane (FP). Using the NEMO package, we performed N-body simulations of close encounters and mergers of two self-gravitating spherical galaxies. Two models for encounting galaxies - Plummer's and Hernquist's - were used. The number of particles ranged from 20 000 to 50 000 per galaxy. The changes of central density, half-mass radius and central velocity dispersion were analysed. It was found that close encounters between galaxies alter noticeably the above parameters within a very short time interval (10(7)-10(8) years) just before the final merger. The amplitudes of parameter changes strongly depend on the initial mass concentration of a model. In some experiments we considered an encounter of two spherical galaxies with dark matter components. The effect of parameter changes was less pronounced than for the experiments without a dark halo. The results of the simulations were used to discuss the FP for interacting early-type galaxies.

AB - We present an analysis of the location of interacting E/S0 galaxies on the Fundamental Plane (FP). Using the NEMO package, we performed N-body simulations of close encounters and mergers of two self-gravitating spherical galaxies. Two models for encounting galaxies - Plummer's and Hernquist's - were used. The number of particles ranged from 20 000 to 50 000 per galaxy. The changes of central density, half-mass radius and central velocity dispersion were analysed. It was found that close encounters between galaxies alter noticeably the above parameters within a very short time interval (10(7)-10(8) years) just before the final merger. The amplitudes of parameter changes strongly depend on the initial mass concentration of a model. In some experiments we considered an encounter of two spherical galaxies with dark matter components. The effect of parameter changes was less pronounced than for the experiments without a dark halo. The results of the simulations were used to discuss the FP for interacting early-type galaxies.

KW - galaxies : kinematics and dynamics

KW - techniques : photometric

KW - KINEMATICAL DATA

KW - BINARY GALAXIES

KW - COMPACT-GROUPS

KW - ORIGINS

KW - CLUES

U2 - 10.1051/0004-6361:20011379

DO - 10.1051/0004-6361:20011379

M3 - статья

VL - 381

SP - 6

EP - 12

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

IS - 1

ER -