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Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478

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Nuclear stellar discs in low-luminosity elliptical galaxies : NGC 4458 and 4478. / Morelli, L.; Halliday, C.; Corsini, E. M.; Pizzella, A.; Thomas, D.; Saglia, R. P.; Davies, R. L.; Bender, R.; Birkinshaw, M.; Bertola, F.

In: Monthly Notices of the Royal Astronomical Society, Vol. 354, No. 3, 01.11.2004, p. 753-762.

Research output: Contribution to journalArticle

Harvard

Morelli, L, Halliday, C, Corsini, EM, Pizzella, A, Thomas, D, Saglia, RP, Davies, RL, Bender, R, Birkinshaw, M & Bertola, F 2004, 'Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478', Monthly Notices of the Royal Astronomical Society, vol. 354, no. 3, pp. 753-762. https://doi.org/10.1111/j.1365-2966.2004.08236.x

APA

Morelli, L., Halliday, C., Corsini, E. M., Pizzella, A., Thomas, D., Saglia, R. P., ... Bertola, F. (2004). Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478. Monthly Notices of the Royal Astronomical Society, 354(3), 753-762. https://doi.org/10.1111/j.1365-2966.2004.08236.x

Vancouver

Morelli L, Halliday C, Corsini EM, Pizzella A, Thomas D, Saglia RP et al. Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478. Monthly Notices of the Royal Astronomical Society. 2004 Nov 1;354(3):753-762. https://doi.org/10.1111/j.1365-2966.2004.08236.x

Author

Morelli, L. ; Halliday, C. ; Corsini, E. M. ; Pizzella, A. ; Thomas, D. ; Saglia, R. P. ; Davies, R. L. ; Bender, R. ; Birkinshaw, M. ; Bertola, F. / Nuclear stellar discs in low-luminosity elliptical galaxies : NGC 4458 and 4478. In: Monthly Notices of the Royal Astronomical Society. 2004 ; Vol. 354, No. 3. pp. 753-762.

Bibtex

@article{a5c26360343e4d87a3fdb020dc36edf5,
title = "Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478",
abstract = "We present the detection of nuclear stellar discs in the low-luminosity elliptical galaxies, NGC 4458 and 4478, which are known to host a kinematically decoupled core. Using archival Hubble Space Telescope imaging, and available absorption line-strength index data based on ground-based spectroscopy, we investigate the photometric parameters and the properties of the stellar populations of these central structures. Their scalelength, h, and face-on central surface brightness, μc0, fit on the μc0–h relation for galaxy discs. For NGC 4458, these parameters are typical for nuclear discs, while the same quantities for NGC 4478 lie between those of nuclear discs and the discs of discy ellipticals. We present Lick/Image Dissector Scanner (IDS) absorption line-strength measurements of Hβ, Mgb and 〈Fe〉 along the major and minor axes of the galaxies. We model these data with simple stellar populations that account for the α/Fe overabundance. The counter-rotating central disc of NGC 4458 is found to have similar properties to the decoupled cores of bright ellipticals. This galaxy has been found to be uniformly old despite being counter-rotating. In contrast, the cold central disc of NGC 4478 is younger, richer in metals and less overabundant than the main body of the galaxy. This points to a prolonged star formation history, typical of an undisturbed disc-like, gas-rich (possibly pre-enriched) structure.",
keywords = "galaxies : abundances, galaxies : elliptical and lenticular, cD, galaxies : evolution, galaxies : formation, galaxies : kinematics and dynamics, galaxies : photometry",
author = "L. Morelli and C. Halliday and Corsini, {E. M.} and A. Pizzella and D. Thomas and Saglia, {R. P.} and Davies, {R. L.} and R. Bender and M. Birkinshaw and F. Bertola",
note = "This article has been accepted for publication in 'Monthly notices of the Royal Astronomical Society {\circledC}: 2004 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.",
year = "2004",
month = "11",
day = "1",
doi = "10.1111/j.1365-2966.2004.08236.x",
language = "English",
volume = "354",
pages = "753--762",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

RIS

TY - JOUR

T1 - Nuclear stellar discs in low-luminosity elliptical galaxies

T2 - NGC 4458 and 4478

AU - Morelli, L.

AU - Halliday, C.

AU - Corsini, E. M.

AU - Pizzella, A.

AU - Thomas, D.

AU - Saglia, R. P.

AU - Davies, R. L.

AU - Bender, R.

AU - Birkinshaw, M.

AU - Bertola, F.

N1 - This article has been accepted for publication in 'Monthly notices of the Royal Astronomical Society ©: 2004 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

PY - 2004/11/1

Y1 - 2004/11/1

N2 - We present the detection of nuclear stellar discs in the low-luminosity elliptical galaxies, NGC 4458 and 4478, which are known to host a kinematically decoupled core. Using archival Hubble Space Telescope imaging, and available absorption line-strength index data based on ground-based spectroscopy, we investigate the photometric parameters and the properties of the stellar populations of these central structures. Their scalelength, h, and face-on central surface brightness, μc0, fit on the μc0–h relation for galaxy discs. For NGC 4458, these parameters are typical for nuclear discs, while the same quantities for NGC 4478 lie between those of nuclear discs and the discs of discy ellipticals. We present Lick/Image Dissector Scanner (IDS) absorption line-strength measurements of Hβ, Mgb and 〈Fe〉 along the major and minor axes of the galaxies. We model these data with simple stellar populations that account for the α/Fe overabundance. The counter-rotating central disc of NGC 4458 is found to have similar properties to the decoupled cores of bright ellipticals. This galaxy has been found to be uniformly old despite being counter-rotating. In contrast, the cold central disc of NGC 4478 is younger, richer in metals and less overabundant than the main body of the galaxy. This points to a prolonged star formation history, typical of an undisturbed disc-like, gas-rich (possibly pre-enriched) structure.

AB - We present the detection of nuclear stellar discs in the low-luminosity elliptical galaxies, NGC 4458 and 4478, which are known to host a kinematically decoupled core. Using archival Hubble Space Telescope imaging, and available absorption line-strength index data based on ground-based spectroscopy, we investigate the photometric parameters and the properties of the stellar populations of these central structures. Their scalelength, h, and face-on central surface brightness, μc0, fit on the μc0–h relation for galaxy discs. For NGC 4458, these parameters are typical for nuclear discs, while the same quantities for NGC 4478 lie between those of nuclear discs and the discs of discy ellipticals. We present Lick/Image Dissector Scanner (IDS) absorption line-strength measurements of Hβ, Mgb and 〈Fe〉 along the major and minor axes of the galaxies. We model these data with simple stellar populations that account for the α/Fe overabundance. The counter-rotating central disc of NGC 4458 is found to have similar properties to the decoupled cores of bright ellipticals. This galaxy has been found to be uniformly old despite being counter-rotating. In contrast, the cold central disc of NGC 4478 is younger, richer in metals and less overabundant than the main body of the galaxy. This points to a prolonged star formation history, typical of an undisturbed disc-like, gas-rich (possibly pre-enriched) structure.

KW - galaxies : abundances

KW - galaxies : elliptical and lenticular, cD

KW - galaxies : evolution

KW - galaxies : formation

KW - galaxies : kinematics and dynamics

KW - galaxies : photometry

U2 - 10.1111/j.1365-2966.2004.08236.x

DO - 10.1111/j.1365-2966.2004.08236.x

M3 - Article

VL - 354

SP - 753

EP - 762

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 3

ER -

ID: 1795467