An improved method for determining the integrated properties of nuclear rings: NGC 1512

Chao Ma; Richard De Grijs; Luis C. Ho

doi:10.3847/1538-4365/aa709e

An improved method for determining the integrated properties of nuclear rings: NGC 1512

Chao Ma, Richard De Grijs, Luis C. Ho

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The integrated properties of nuclear rings are correlated with the secular evolution and dynamics of the host galaxies of the rings, as well as with the formation and evolution of the rings' star cluster population(s). Here we present a new method to accurately measure the spectral energy distribution and current star formation rate (SFR) of the nuclear ring in the barred spiral galaxy NGC 1512, based on high-resolution Hubble and Spitzer Space Telescope images. Image degradation does not have a significant negative effect on the robustness of the results. To obtain the ring's SFR for the period spanning ∼3-10 Myr, we apply our method to the continuum-subtracted Hα and 8 μm images. The resulting SFR surface density, ∑_SFR=00.9 M_⊙yr^-1kpc^-2, is much higher than the disk-Averaged SFR densities in normal galaxies. We also estimate the ring's total stellar mass, log (M/M_⊙) = 7.1 ± 0.11, for an average age of ~40 Myr.

Original language	English
Article number	14
Number of pages	7
Journal	The Astrophysical Journal. Supplement Series
Volume	230
Issue number	2
DOIs	https://doi.org/10.3847/1538-4365/aa709e
Publication status	Published - Jun 2017
Externally published	Yes

Keywords

galaxies: evolution
galaxies: fundamental parameters
galaxies: individual (NGC 1512)
galaxies: star formation
methods: observational

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10.3847/1538-4365/aa709e

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title = "An improved method for determining the integrated properties of nuclear rings: NGC 1512",

abstract = "The integrated properties of nuclear rings are correlated with the secular evolution and dynamics of the host galaxies of the rings, as well as with the formation and evolution of the rings' star cluster population(s). Here we present a new method to accurately measure the spectral energy distribution and current star formation rate (SFR) of the nuclear ring in the barred spiral galaxy NGC 1512, based on high-resolution Hubble and Spitzer Space Telescope images. Image degradation does not have a significant negative effect on the robustness of the results. To obtain the ring's SFR for the period spanning ∼3-10 Myr, we apply our method to the continuum-subtracted Hα and 8 μm images. The resulting SFR surface density, ∑SFR = 00.9 M⊙ yr-1 kpc-2, is much higher than the disk-Averaged SFR densities in normal galaxies. We also estimate the ring's total stellar mass, log (M/M⊙) = 7.1 ± 0.11, for an average age of ~40 Myr.",

keywords = "galaxies: evolution, galaxies: fundamental parameters, galaxies: individual (NGC 1512), galaxies: star formation, methods: observational",

author = "Chao Ma and {De Grijs}, Richard and Ho, {Luis C.}",

year = "2017",

month = jun,

doi = "10.3847/1538-4365/aa709e",

language = "English",

volume = "230",

journal = "The Astrophysical Journal. Supplement Series",

issn = "0067-0049",

publisher = "Institute of Physics Publishing",

number = "2",

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T1 - An improved method for determining the integrated properties of nuclear rings

T2 - NGC 1512

AU - Ma, Chao

AU - De Grijs, Richard

AU - Ho, Luis C.

PY - 2017/6

Y1 - 2017/6

N2 - The integrated properties of nuclear rings are correlated with the secular evolution and dynamics of the host galaxies of the rings, as well as with the formation and evolution of the rings' star cluster population(s). Here we present a new method to accurately measure the spectral energy distribution and current star formation rate (SFR) of the nuclear ring in the barred spiral galaxy NGC 1512, based on high-resolution Hubble and Spitzer Space Telescope images. Image degradation does not have a significant negative effect on the robustness of the results. To obtain the ring's SFR for the period spanning ∼3-10 Myr, we apply our method to the continuum-subtracted Hα and 8 μm images. The resulting SFR surface density, ∑SFR = 00.9 M⊙ yr-1 kpc-2, is much higher than the disk-Averaged SFR densities in normal galaxies. We also estimate the ring's total stellar mass, log (M/M⊙) = 7.1 ± 0.11, for an average age of ~40 Myr.

AB - The integrated properties of nuclear rings are correlated with the secular evolution and dynamics of the host galaxies of the rings, as well as with the formation and evolution of the rings' star cluster population(s). Here we present a new method to accurately measure the spectral energy distribution and current star formation rate (SFR) of the nuclear ring in the barred spiral galaxy NGC 1512, based on high-resolution Hubble and Spitzer Space Telescope images. Image degradation does not have a significant negative effect on the robustness of the results. To obtain the ring's SFR for the period spanning ∼3-10 Myr, we apply our method to the continuum-subtracted Hα and 8 μm images. The resulting SFR surface density, ∑SFR = 00.9 M⊙ yr-1 kpc-2, is much higher than the disk-Averaged SFR densities in normal galaxies. We also estimate the ring's total stellar mass, log (M/M⊙) = 7.1 ± 0.11, for an average age of ~40 Myr.

KW - galaxies: evolution

KW - galaxies: fundamental parameters

KW - galaxies: individual (NGC 1512)

KW - galaxies: star formation

KW - methods: observational

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U2 - 10.3847/1538-4365/aa709e

DO - 10.3847/1538-4365/aa709e

M3 - Article

AN - SCOPUS:85021370288

SN - 0067-0049

VL - 230

JO - The Astrophysical Journal. Supplement Series

JF - The Astrophysical Journal. Supplement Series

IS - 2

M1 - 14

ER -

An improved method for determining the integrated properties of nuclear rings: NGC 1512

Abstract

Keywords

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