Nuclear stellar disks in spiral galaxies

A. Pizzella; E. M. Corsini; L. Morelli; M. Sarzi; C. Scarlata; M. Stiavelli; F. Bertola

doi:10.1086/340486

Nuclear stellar disks in spiral galaxies

A. Pizzella, E. M. Corsini, L. Morelli, M. Sarzi, C. Scarlata, M. Stiavelli, F. Bertola

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49 Scopus citations

Abstract

We report evidence for nuclear stellar disks in three early-type spirals, namely, NGC 1425, NGC 3898, and NGC 4698, revealed by Wide Field Planetary Camera 2 F606W images out of a sample of 38 spiral galaxies, selected from the Hubble Space Telescope data archive. Adopting the photometric method introduced by Scorza &Bender, we derived their central surface brightness and scale length by assuming them to be infinitesimally thin exponential disks. No nuclear disk was found in barred galaxies or galaxies of Hubble type later than Sb. The external origin of the disk in NGC 4698 is strongly suggested by its orthogonal geometrical decoupling with respect to the host galaxy.

Original language	English (US)
Pages (from-to)	131-137
Number of pages	7
Journal	Astrophysical Journal
Volume	573
Issue number	1 I
DOIs	https://doi.org/10.1086/340486
State	Published - Jul 1 2002
Externally published	Yes

Keywords

Galaxies: individual (NGC 1425, NGC 3898, NGC 4698)
Galaxies: photometry
Galaxies: spiral
Galaxies: structure

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title = "Nuclear stellar disks in spiral galaxies",

abstract = "We report evidence for nuclear stellar disks in three early-type spirals, namely, NGC 1425, NGC 3898, and NGC 4698, revealed by Wide Field Planetary Camera 2 F606W images out of a sample of 38 spiral galaxies, selected from the Hubble Space Telescope data archive. Adopting the photometric method introduced by Scorza &Bender, we derived their central surface brightness and scale length by assuming them to be infinitesimally thin exponential disks. No nuclear disk was found in barred galaxies or galaxies of Hubble type later than Sb. The external origin of the disk in NGC 4698 is strongly suggested by its orthogonal geometrical decoupling with respect to the host galaxy.",

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T1 - Nuclear stellar disks in spiral galaxies

AU - Pizzella, A.

AU - Corsini, E. M.

AU - Morelli, L.

AU - Sarzi, M.

AU - Scarlata, C.

AU - Stiavelli, M.

AU - Bertola, F.

PY - 2002/7/1

Y1 - 2002/7/1

N2 - We report evidence for nuclear stellar disks in three early-type spirals, namely, NGC 1425, NGC 3898, and NGC 4698, revealed by Wide Field Planetary Camera 2 F606W images out of a sample of 38 spiral galaxies, selected from the Hubble Space Telescope data archive. Adopting the photometric method introduced by Scorza &Bender, we derived their central surface brightness and scale length by assuming them to be infinitesimally thin exponential disks. No nuclear disk was found in barred galaxies or galaxies of Hubble type later than Sb. The external origin of the disk in NGC 4698 is strongly suggested by its orthogonal geometrical decoupling with respect to the host galaxy.

AB - We report evidence for nuclear stellar disks in three early-type spirals, namely, NGC 1425, NGC 3898, and NGC 4698, revealed by Wide Field Planetary Camera 2 F606W images out of a sample of 38 spiral galaxies, selected from the Hubble Space Telescope data archive. Adopting the photometric method introduced by Scorza &Bender, we derived their central surface brightness and scale length by assuming them to be infinitesimally thin exponential disks. No nuclear disk was found in barred galaxies or galaxies of Hubble type later than Sb. The external origin of the disk in NGC 4698 is strongly suggested by its orthogonal geometrical decoupling with respect to the host galaxy.

KW - Galaxies: individual (NGC 1425, NGC 3898, NGC 4698)

KW - Galaxies: photometry

KW - Galaxies: spiral

KW - Galaxies: structure

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Nuclear stellar disks in spiral galaxies

Abstract

Keywords

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