The Hyades-age cluster NGC 1817

Details The Hyades-age cluster NGC 1817 The Hyades-age cluster NGC 1817

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977aj.....82..612h&link_type=abstract

Astronomical Journal, vol. 82, Aug. 1977, p. 612-619.

Astronomy and Astrophysics

Astronomy

26

Astronomical Photometry, Electrophotometry, Star Clusters, Ubv Spectra, Abundance, Astronomical Photography, Color-Magnitude Diagram, Main Sequence Stars, Open Clusters, Red Giant Stars, Stellar Magnitude, Tables (Data)

Scientific paper

Results are reported for a UBV photometric study of NGC 1817, which is shown to be a populous open cluster similar to the Hyades in age. The foreground reddening is calculated to be about 0.28 magnitude and is apparently uniform, while the distance modulus is approximately 11.3. The color-magnitude diagram reveals a well-defined main sequence, turnoff region, and populous red-giant clump. The latter is about 0.15 magnitude bluer than the Hyades/Praesepe giants, suggesting that NGC 1817 may have a slightly lower heavy-element abundance.

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