2016/02/25 by Qing Gao, Wei Wang, Gao, Qing +6
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics of Galaxies (astro-ph.GA) #Cepheid variable #Cosmic distance ladder #Distance modulus #Extinction (optical mineralogy) #FOS: Physical sciences #Galaxy #Large Magellanic Cloud #Photometry (optics) #Physics #Solar and Stellar Astrophysics (astro-ph.SR) #Spiral galaxy #Stars #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1602.07841
published in arXiv (Cornell University) (Cornell University)
arxiv created 2016/02/25 · openalex publication_date 2016/02/25 · arxiv updated 2016/02/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We present the detection of Cepheids in the barred spiral galaxy NGC 1313, using the Wide Field and Planetary Camera 2 on the Hubble Space Telescpoe. Twenty B (F450W) and V (F555W) epochs of observations spanning over three weeks were obtained, on which the profile-fitting photometry of all stars in the monitored field was performed using the package HSTphot. A sample of 26 variable stars have been identified to be Cepheids, with periods between 3 and 14 days. Based on the derived period-luminosity relations in B and V bands, we obtain an extinction-corrected distance modulus of mu = 28.32 +- 0.08 (random) +- 0.06 (systematic), employing the Large Magellanic Cloud as the distance zero point calibrator. The above moduli correspond to a distance of 4.61 +- 0.17 (random) +- 0.13 (systematic) Mpc, consistent with previous measurements reported in the literature with uncertainties. In addition, the reddening to NGC 1313 is found to be small.