Spectroscopy of NGC 4258 Globular Cluster Candidates: Membership Confirmation 
and Kinematics

González-Lópezlira, Rosa A.; Mayya, Y. D.; Loinard, Laurent; Álamo-Martínez, Karla; Heald, George; Georgiev, Iskren Y.; Órdenes-Briceño, Yasna; Lançon, Ariane; Lara-López, Maritza A.; Lomelí-Núñez, Luis; Bruzual, Gustavo; Puzia, Thomas H.

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学術論文

Spectroscopy of NGC 4258 Globular Cluster Candidates: Membership Confirmation and Kinematics

MPS-Authors

González-Lópezlira, Rosa A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mayya, Y. D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Loinard, Laurent
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Álamo-Martínez, Karla
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Heald, George
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Georgiev, Iskren Y.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Órdenes-Briceño, Yasna
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lançon, Ariane
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lara-López, Maritza A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lomelí-Núñez, Luis
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bruzual, Gustavo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Puzia, Thomas H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019ApJ...876...39G
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引用

González-Lópezlira, R. A., Mayya, Y. D., Loinard, L., Álamo-Martínez, K., Heald, G., Georgiev, I. Y., Órdenes-Briceño, Y., Lançon, A., Lara-López, M. A., Lomelí-Núñez, L., Bruzual, G., & Puzia, T. H. (2019). Spectroscopy of NGC 4258 Globular Cluster Candidates: Membership Confirmation and Kinematics. The Astrophysical Journal, 876.

引用: https://hdl.handle.net/21.11116/0000-0005-D114-8

要旨

We present multiobject spectroscopic observations of 23 globular cluster candidates (GCCs) in the prototypical megamaser galaxy NGC 4258, carried out with the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy instrument at the 10.4 m Gran Telescopio Canarias. The candidates have been selected based on the (u* − i′) versus (i′ − K _s) diagram, in the first application of the u*i′K _s method to a spiral galaxy. In the spectroscopy presented here, 70% of the candidates are confirmed as globular clusters (GCs). Our results validate the efficiency of the u*i′K _s method in the sparser GC systems of spirals, and given the downward correction to the total number of GCs, the agreement of the galaxy with the correlations between black hole mass and the total number and mass of GCs is actually improved. We find that the GCs, mostly metal-poor, corotate with the H I disk, even at large galactocentric distances.