Cepheids in M31: The PAndromeda Cepheid Sample

Kodric, Mihael; Riffeser, Arno; Hopp, Ulrich; Goessl, Claus; Seitz, Stella; Bender, Ralf; Koppenhoefer, Johannes; Obermeier, Christian; Snigula, Jan; Lee, Chien-Hsiu; Burgett, W.S.; Draper, P.W.; Hodapp, K.W.; Kaiser, N.; Kudritzki, R.-P.; Metcalfe, N.; Tonry, J.L.; Wainscoat, R.J.

Abstract

We present the largest Cepheid sample in M31 based on the complete Pan-STARRS1 survey of Andromeda (PAndromeda) in the r P1, i P1, and g P1 bands. We find 2686 Cepheids with 1662 fundamental-mode Cepheids, 307 first-overtone Cepheids, 278 type II Cepheids, and 439 Cepheids with undetermined Cepheid type. Using the method developed by Kodric et al., we identify Cepheids by using a three-dimensional parameter space of Fourier parameters of the Cepheid light curves combined with a color cut and other selection criteria. This is an unbiased approach to identify Cepheids and results in a homogeneous Cepheid sample. The period–luminosity relations obtained for our sample have smaller dispersions than in our previous work. We find a broken slope that we previously observed with HST data in Kodric et al., albeit with a lower significance.

Citation

Kodric, M., Riffeser, A., Hopp, U., Goessl, C., Seitz, S., Bender, R., …Wainscoat, R. (2018). Cepheids in M31: The PAndromeda Cepheid Sample. Astronomical Journal, 156(3), Article 130. https://doi.org/10.3847/1538-3881/aad40f

• Journal Article Type: Article
• Acceptance Date: Jun 19, 2018
• Online Publication Date: Aug 29, 2018
• Publication Date: Aug 29, 2018
• Deposit Date: Sep 13, 2018
• Publicly Available Date: Sep 13, 2018
• Journal: Astronomical Journal
• Print ISSN: 0004-6256
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 156
• Issue: 3
• Article Number: 130
• DOI: https://doi.org/10.3847/1538-3881/aad40f