The Discovery of Cepheids and a New Distance to NGC 2841 Using theHubble Space Telescope | Zendy

Lucas M. Macri | Zendy; P. B. Stetson | Zendy; G. D. Bothun | Zendy; Wendy L. Freedman | Zendy; P. Garnavich | Zendy; Saurabh W. Jha | Zendy; Barry F. Madore | Zendy; M. Richmond | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

The Discovery of Cepheids and a New Distance to NGC 2841 Using theHubble Space Telescope

Author(s) -

Lucas M. Macri,

P. B. Stetson,

G. D. Bothun,

Wendy L. Freedman,

P. Garnavich,

Saurabh W. Jha,

Barry F. Madore,

M. Richmond

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/322395

Subject(s) - cepheid variable , distance modulus , astrophysics , physics , photometry (optics) , hubble space telescope , astronomy , spiral galaxy , cosmic distance ladder , galaxy , metallicity , hubble's law , stars , redshift

We report on the discovery of Cepheids in the spiral galaxy NGC 2841, basedon observations made with the Wide Field and Planetary Camera 2 on board theHubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555Wfilter, and over 5 epochs using the F814W filter. Photometry was performedusing the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheidswith periods ranging from 15 to 40 days. Period-luminosity relations in the Vand I bands, based on the high-quality Cepheids, yield an extinction-correcteddistance modulus of 30.74 +/- 0.23 mag, which corresponds to a distance of 14.1+/- 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of 18.50+/- 0.10 mag (D = 50+/- 2.5 kpc) and a metallicity dependence of the CepheidP-L relation of gamma (VI) = -0.2 +/- 0.2 mag/dex.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research