[
    {
        "id": "authors:jvh4k-r8x55",
        "collection": "authors",
        "collection_id": "jvh4k-r8x55",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190521-161528584",
        "type": "monograph",
        "title": "Signatures of an intermediate-age metal-rich bulge population",
        "author": [
            {
                "family_name": "Bensby",
                "given_name": "T.",
                "clpid": "Bensby-T"
            },
            {
                "family_name": "Feltzing",
                "given_name": "S.",
                "clpid": "Feltzing-S"
            },
            {
                "family_name": "Gould",
                "given_name": "A.",
                "clpid": "Gould-A"
            },
            {
                "family_name": "Johnson",
                "given_name": "J. A.",
                "orcid": "0000-0001-9808-7172",
                "clpid": "Johnson-J-A"
            },
            {
                "family_name": "Asplund",
                "given_name": "M.",
                "clpid": "Asplund-M"
            },
            {
                "family_name": "Ad\u00e9n",
                "given_name": "D.",
                "clpid": "Ad\u00e9n-D"
            },
            {
                "family_name": "Mel\u00e9ndez",
                "given_name": "J.",
                "orcid": "0000-0002-4933-2239",
                "clpid": "Mel\u00e9ndez-J"
            },
            {
                "family_name": "Cohen",
                "given_name": "J. G.",
                "orcid": "0000-0002-8039-4673",
                "clpid": "Cohen-J-G"
            },
            {
                "family_name": "Thompson",
                "given_name": "I.",
                "clpid": "Thompson-I"
            },
            {
                "family_name": "Lucatello",
                "given_name": "S.",
                "clpid": "Lucatello-S"
            },
            {
                "family_name": "Gal-Yam",
                "given_name": "A.",
                "orcid": "0000-0002-3653-5598",
                "clpid": "Gal-Yam-A"
            }
        ],
        "abstract": "We have determined detailed elemental abundances and stellar ages for a sample of now 38 microlensed dwarf and subgiant stars in the Galactic bulge. Stars with sub-solar metallicities are all old and have enhanced alpha-element abundances -- very similar to what is seen for local thick disk stars. The metal-rich stars on the other hand show a wide variety of stellar ages, ranging from 3-4 Gyr to 12 Gyr, and an average around 7-8 Gyr. The existence of young and metal-rich stars are in conflict with recent photometric studies of the bulge which claim that the bulge only contains old stars.",
        "doi": "10.48550/arXiv.1201.2013",
        "publisher": "arXiv",
        "publication_date": "2012-01-10"
    },
    {
        "id": "authors:5gz40-csp09",
        "collection": "authors",
        "collection_id": "5gz40-csp09",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190521-161942082",
        "type": "monograph",
        "title": "A Status Report on the 0Z Project",
        "author": [
            {
                "family_name": "Cohen",
                "given_name": "Judith G.",
                "orcid": "0000-0002-8039-4673",
                "clpid": "Cohen-J-G"
            },
            {
                "family_name": "Christlieb",
                "given_name": "Norbert",
                "orcid": "0000-0002-4043-2727",
                "clpid": "Christlieb-N"
            },
            {
                "family_name": "McWilliam",
                "given_name": "Andrew",
                "clpid": "McWilliam-A"
            },
            {
                "family_name": "Shectman",
                "given_name": "Stephen",
                "clpid": "Shectman-S-A"
            },
            {
                "family_name": "Thompson",
                "given_name": "Ian",
                "clpid": "Thompson-I"
            }
        ],
        "abstract": "We present an update on the status of the 0Z Survey, an effort to datamine the Hamburg/ESO Survey to find and study in detail a large sample of extremely metal-poor Galactic halo field stars with [Fe/H] < -3 dex. After searching 1,565 moderate resolution spectra of candidates selected from the HES, we have acquired high resolution spectra of 103 of the most metal-poor of them. Detailed abundance analyses have been performed for all these stars. This has resulted in the discovery of 18 new stars below [Fe/H] -3.5 dex and 57 below -3.0 dex. Some results are presented regarding our search for outliers in chemical abundances of particular species among the sample of 103 stars. Ignoring C and N, about 15% of the sample are \"abnormal\" in some way. Our plans to complete this project and write the final set of papers are described.",
        "doi": "10.48550/arXiv.1105.1126",
        "publisher": "arXiv",
        "publication_date": "2011-05-05"
    }
]