{"product_id":"cosmic-chemical-evolution-k-nomoto-9781402004490","title":"Cosmic Chemical Evolution: Proceedings of the 187th Symposium of the International Astronomical Union, Held at Kyoto, Japan, 26-30 August 1997","description":"The open cluster NGC 6791 is now considered both the oldest and the most metal-rich known. Its age is 8 -10 Gyrs, twice as old as the canonical solar-metallicity cluster M67 (Garnavich et al. 1994; Demarque, Green, \u0026amp; Guenther 1992; Tripicco et al. 1995). That its metallicity is significantly above solar is suggested from moderate-resolution spectroscopy and from a mismatch of its color-magnitude diagram (CMD) with solar-metallicity isochrones. Tripicco et al. (1995) find [Fe\/H] = +0.27 to +0.44. The cluster population is rich. In addition to about a dozen red giants and two dozen red horizontal-branch stars, the cluster has several very hot HB stars (Kaluzny \u0026amp; Udalski 1992). Liebert et al. (1994) have shown that the extremely blue stars are mostly sdB\/sdO stars and at least 3 or 4 are likely cluster members, the first ever discovered in an open cluster. These may provide the key to the puzzling upturn in ultraviolet flux below 1500A seen in many high-metallicity systems (Burstein et al. 1988; Ferguson et al. \u0026amp; Liebert 1993).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e K. Nomoto\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1402004494\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781402004490\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Springer\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 03\/31\/2002\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 242\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.90lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.44h x 6.34w x 0.59d","brand":"K. Nomoto","offers":[{"title":"Paperback","offer_id":48485079613695,"sku":"9781402004490","price":169.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_5196b078-cee2-497b-8991-16c818e32c22.jpg?v=1778047768","url":"https:\/\/www.whiterainbookhouse.com\/products\/cosmic-chemical-evolution-k-nomoto-9781402004490","provider":"WR Book House","version":"1.0","type":"link"}