Counterrotating core in IC 1459

Franx, M; Illingworth, G D

doi:10.1086/185139

Title: Counterrotating core in IC 1459

Full Record
Other Related Research

Abstract

The radio elliptical IC 1459 is shown to have a massive rapidly counterrotating stellar core. Along the major axis a strong peak in the rotational velocity is observed at a distance of 2 arcsec (0.3 kpc) from the center. The velocity reaches 170 + or - 20 km/s. The rotational velocity in the outer parts rises to 45 + or - 8 km/s, but in the opposite sense to the rotation of the center. Along the minor axis, no significant rotation is measured, neither in the center nor in the outer parts. Line profiles derived from cross-correlated spectra along the major axis in the core show a clear asymmetry. Ionized gas rotates around the minor axis in the same sense as the outer part of the galaxy. The other properties are typical of normal ellipticals. The galaxy has a regular color gradient and line strength gradient. The mass of the counterrotating component is estimated to be about 10 to the 10th solar masses. It is postulated that such a core could form, following the merger of two galaxies, either by the tidal disruption of the victim or through a starburst-like event. 27 references.

Authors:: Franx, M; Illingworth, G D

Publication Date:: Fri Apr 01 00:00:00 EST 1988

Research Org.:: Leiden, Rijksuniversiteit, Sterrewacht (Netherlands); Space Telescope Science Institute, Baltimore, MD (USA)

OSTI Identifier:: 7129114

Resource Type:: Journal Article

Journal Name:: Astrophys. J.; (United States)

Additional Journal Information:: Journal Volume: 327

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; RADIO GALAXIES; ELLIPTICAL CONFIGURATION; GALACTIC EVOLUTION; GALAXY NUCLEI; GRAVITATIONAL INTERACTIONS; IONIZED GASES; MASS; ROTATION; STAR EVOLUTION; STELLAR RADIATION; BASIC INTERACTIONS; CONFIGURATION; COSMIC RADIO SOURCES; FLUIDS; GALAXIES; GASES; INTERACTIONS; MOTION; 640105* - Astrophysics & Cosmology- Galaxies

Citation Formats


                    Franx, M, and Illingworth, G D. Counterrotating core in IC 1459.  United States: N. p., 1988. 
        Web.  doi:10.1086/185139.

Copy to clipboard


                    Franx, M, & Illingworth, G D. Counterrotating core in IC 1459.  United States.  https://doi.org/10.1086/185139

Copy to clipboard


                    Franx, M, and Illingworth, G D. 1988.  
        "Counterrotating core in IC 1459".  United States.  https://doi.org/10.1086/185139.

Copy to clipboard


                    
@article{osti_7129114,

  title        = {Counterrotating core in IC 1459},

  author       = {Franx, M and Illingworth, G D},

  abstractNote = {The radio elliptical IC 1459 is shown to have a massive rapidly counterrotating stellar core. Along the major axis a strong peak in the rotational velocity is observed at a distance of 2 arcsec (0.3 kpc) from the center. The velocity reaches 170 + or - 20 km/s. The rotational velocity in the outer parts rises to 45 + or - 8 km/s, but in the opposite sense to the rotation of the center. Along the minor axis, no significant rotation is measured, neither in the center nor in the outer parts. Line profiles derived from cross-correlated spectra along the major axis in the core show a clear asymmetry. Ionized gas rotates around the minor axis in the same sense as the outer part of the galaxy. The other properties are typical of normal ellipticals. The galaxy has a regular color gradient and line strength gradient. The mass of the counterrotating component is estimated to be about 10 to the 10th solar masses. It is postulated that such a core could form, following the merger of two galaxies, either by the tidal disruption of the victim or through a starburst-like event. 27 references.},

  doi          = {10.1086/185139},

  url          = {https://www.osti.gov/biblio/7129114},
  journal      = {Astrophys. J.; (United States)},
number       = ,

  volume       = 327,

  place        = {United States},

  year         = {Fri Apr 01 00:00:00 EST 1988},

  month        = {Fri Apr 01 00:00:00 EST 1988}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1086/185139

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Major and minor axis kinematics of 22 ellipticals

Journal Article Franx, M; Illingworth, G; Heckman, T - Astrophysical Journal; (USA)

Rotation curves and velocity dispersion profiles have been determined for the major and the minor axes of 22 elliptical galaxies. Rotation was detected in all but one galaxy, even though the sample was biased toward round ellipticals. Minor axis rotation larger than major axis rotation was measured in two galaxies, NGC 4406 and NGC 7507. Roughly 10 percent of ellipticals may show large minor axis velocities relative to those on the major axis. A simple model is used to derive a rotational axis from the observed minor and major axis velocities to a typical accuracy of 6 deg. The rotationalmore »« less
https://doi.org/10.1086/167830
EVIDENCE OF A DISTINCT STELLAR POPULATION IN THE COUNTERROTATING CORE OF NGC 1700

Journal Article Kleineberg, K; Vazdekis, A; Sanchez-Blazquez, P - Astrophysical Journal Letters

We find a distinct stellar population in the counterrotating and kinematically decoupled core of the isolated massive elliptical galaxy NGC 1700. Coinciding with the edge of this core, we find a significant change in the slope of the gradient of various representative absorption line indices. Our age estimate for this core is markedly younger than the main body of the galaxy. We find lower values for the age, metallicity, and Mg/Fe abundance ratio in the center of this galaxy when we compare them with other isolated elliptical galaxies with similar velocity dispersion. We discuss the different possible scenarios that mightmore »« less
https://doi.org/10.1088/2041-8205/732/2/L33
Ultramassive (about 10 to the 11th solar mass) dark core in the luminous infrared galaxy NGC 6240

Journal Article Bland-hawthorn, J; Wilson, A; Tully, R - Astrophysical Journal; (United States)

The first complete kinematic maps for the superluminous IR galaxy NGC 6240 are reported. The data reveal two dynamical disks that exhibit radically different rotation and are closely spaced in velocity and position. One disk is roughly aligned with the major axis of the near-IR continuum and exhibits flat rotation out to about 20 arsec in radius, centered on the doubled nucleus seen at optical, near-IR, and radio wavelengths. The rotation turns over at r(t1) roughly 7.2 arcsec with a peak-to-peak velocity amplitude of roughly 280/sin i1 km/s, where i1 is the disk inclination. The rotation curve of the secondmore »« less
https://doi.org/10.1086/185992
Testing the gravitational field in elliptical galaxies - NGC 5077

Journal Article Bertola, F; Bettoni, D; Danziger, J; ... - Astrophysical Journal; (United States)

The intrinsic shape and the mass distribution of the underlying galaxy of NGC 5077, a southern elliptical galaxy with a disk of ionized gas along its minor axis, are investigated on the basis of observations of the structure and kinematics of this gas disk. It is shown that it is possible to construct realistic triaxial mass models for early-type galaxies. These models suggest that NGC 5077 has a constant M/L of about 4-5 in solar units throughout the central 5-10 kpc. The velocity fields of the triaxial models offer three advantages: they can explain the observed position angle differnce ofmore »« less
https://doi.org/10.1086/170058
Radio galaxy IC 4296 (PKS 1333-33). II. Spectroscopy, surface photometry, X-ray imaging, and infrared photometry

Journal Article Killeen, N; Bicknell, G; Carter, D - Astrophys. J.; (United States)

Spectroscopic and photometric observations of the radio jet galaxy IC 4296 are presented. The major axis rotation velocities are initially consistent with solid body rotation of angular velocity about 3 km/s/arcsec. Beyond a radius of roughly 20 deg, the rotation is approximately constant at 60 + or - 30 km/s. The velocity dispersion along the major axis shows a maximum of 340 + or - 30 km/s in the nucleus which then decreases with radius. A mass-to-light ratio of (13.2 + or - 3)h in solar units and a mass of (7.3 + or - 3) x 10 to themore »« less
https://doi.org/10.1086/164576

Similar Records