On the Anomalous Balmer Line Strengths in Globular Clusters Export

@article{citeulike:4544428, abstract = {Spectral feature index diagrams with integrated globular clusters and simple stellar population models often show that some clusters have weak H beta, so weak that even the oldest models cannot match the observed feature depths. In this work, we rule out the possibility that abundance mixture effects are responsible for the weak indices unless such changes operate to cool the entire isochrone. We discuss this result in the context of other explanations, including horizontal branch morphology, blue straggler populations, and nebular or stellar emission fill-in.}, archivePrefix = {arXiv}, author = {Poole, Violet and Worthey, Guy and Lee, Hyun-Chul and Serven, Jedidiah}, citeulike-article-id = {4544428}, citeulike-linkout-0 = {http://arxiv.org/abs/0905.2407}, citeulike-linkout-1 = {http://arxiv.org/pdf/0905.2407}, day = {14}, eprint = {0905.2407}, keywords = {balmer, gcs, line, strengths}, month = {May}, posted-at = {2009-05-19 07:57:00}, priority = {2}, title = {On the Anomalous Balmer Line Strengths in Globular Clusters}, url = {http://arxiv.org/abs/0905.2407}, year = {2009} }

TY - JOUR ID - citeulike:4544428 L3 - citeulike-article-id:4544428 N2 - Spectral feature index diagrams with integrated globular clusters and simple stellar population models often show that some clusters have weak H beta, so weak that even the oldest models cannot match the observed feature depths. In this work, we rule out the possibility that abundance mixture effects are responsible for the weak indices unless such changes operate to cool the entire isochrone. We discuss this result in the context of other explanations, including horizontal branch morphology, blue straggler populations, and nebular or stellar emission fill-in. TI - On the Anomalous Balmer Line Strengths in Globular Clusters KW - balmer KW - gcs KW - line KW - strengths AU - Poole, Violet AU - Worthey, Guy AU - Lee, Hyun-Chul AU - Serven, Jedidiah PY - 2009/May/14/ UR - http://arxiv.org/abs/0905.2407 ER -