Discovery and Photometry of Cepheids in IC 342

Details Discovery and Photometry of Cepheids in IC 342 Discovery and Photometry of Cepheids in IC 342

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19916104s&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #161.04; Bulletin of the American Astronomical Society, Vol. 34, p.572

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the discovery of 24 Cepheid variables in the face on spiral galaxy IC 342, from observations made with the WIYN telescope on Kitt Peak in the r and i passbands of the extended Thuan-Gunn photometric system. IC 342 lies along a direction very close to the plane of our Galaxy, and suffers significant foreground extinction. From the Cepheid period-luminosity relations, we derive the mean apparent distance moduli to be 28.99 +/- 0.06 and 28.34 +/- 0.12 in r and i respectively. This implies a de-reddened distance modulus of 26.76 +/- 0.48. The large uncertainty in this result reflects the uncertainty of the mean i magnitudes, which are based on only a few epochs. Further observations in the i band will therefore reduce the uncertainty in the distance determination.

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