HST/WFC3 obs. of the Fireworks galaxy (NGC 6946) Virtual Observatory Resource

Authors
  1. Tran D.
  2. Williams B.
  3. Levesque E.
  4. Lazzarini M.
  5. Dalcanton J.
  6. Dolphin A.,Koplitz B.
  7. Smercina A.
  8. Telford O.G.
  9. Published by
    CDS
Abstract

The nearby face-on star-forming spiral galaxy NGC 6946 is known as the Fireworks Galaxy due to its hosting an unusually large number of supernovae. We analyze its resolved near-ultraviolet stellar photometry measured from images taken with the Hubble Space Telescope's Wide Field Camera 3 with the F275W and F336W filters. We model the color-magnitude diagrams of the UV photometry to derive the spatially resolved star formation history of NGC 6946 over the last 25Myr. From this analysis, we produce maps of the spatial distribution of the young stellar population and measure the total recent star formation rate (SFR) of nearly the entire young stellar disk. We find the global SFR(age<=25Myr)=13.17_-0.79_^+0.91^M_{sun}_/yr. Over this period, the SFR is initially very high (23.39_-2.11_^+2.43^M_{sun}_/yr 16-25Myr ago), then monotonically decreases to 5.31_-0.17_^+0.19^M_{sun}_/yr in the last 10Myr. This decrease in global SFR over the last 25Myr is consistent with measurements made with other SFR indicators. We discuss in detail two of the most active regions of the galaxy, which we find are responsible for 3% and 5% of the total star formation over the past 6.3Myr.

Keywords
  1. galaxies
  2. photometry
  3. hst-photometry
  4. ultraviolet-astronomy
  5. visible-astronomy
Bibliographic source Bibcode
2023ApJ...954..211T
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/954/211
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/954/211

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/954/211
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/954/211
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/954/211
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/954/211/fuvscat?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/954/211/fuvscat?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/954/211/fuvscat?

History

2025-12-05T07:53:21Z
Resource record created
2025-12-05T07:08:35Z
Updated
2025-12-05T07:53:21Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr