H-band Light Curves of Milky Way Cepheids via Difference Imaging Academic Article uri icon


  • Abstract We present H-band light curves of Milky Way classical Cepheids observed as part of the Dark Energy, H 0, and peculiar Velocities using Infrared Light from Supernovae survey with the Wide-Field Infrared Camera on the United Kingdom Infrared Telescope. Due to the crowded nature of these fields caused by defocusing the Camera, we performed difference-imaging photometry by modifying a pipeline originally developed to analyze images from the Transiting Exoplanet Survey Satellite. We achieved a photometric precision in line with expectations from photon statistics, reaching 0.01 mag for 8 H 11 mag. We used the resulting Cepheid light curves to derive corrections to mean light for random-phase Hubble Space Telescope observations in F160W. We find good agreement with previous phase corrections based on VI light curves from the literature, with a mean difference of 1 6 mmag.

published proceedings


altmetric score

  • 7.33

author list (cited authors)

  • Konchady, T., Oelkers, R. J., Jones, D. O., Yuan, W., Macri, L. M., Peterson, E. R., & Riess, A. G.

citation count

  • 5

complete list of authors

  • Konchady, Tarini||Oelkers, Ryan J||Jones, David O||Yuan, Wenlong||Macri, Lucas M||Peterson, Erik R||Riess, Adam G

publication date

  • January 2022