The Discovery of Tidal Tails around the Globular Cluster NGC 7492 with Pan-STARRS1
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Peer-reviewed
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Abstract
We report the discovery of tidal tails around the Galactic globular cluster NGC 7492, based on the Data Release 1 of the Pan-STARRS1 survey. The tails were detected using a version of the matched filter technique applied to the (g − r, r) and (g − i, i) color–magnitude diagrams. Tidal tails emerging from the cluster extend at least ~3fdg5 in the north–east to south–east direction, equivalent to ~1.5 kpc in projected length.
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Keywords
Galaxy: formation, Galaxy: halo, globular clusters: individual (NGC 7492)
Journal Title
ASTROPHYSICAL JOURNAL LETTERS
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Journal ISSN
2041-8205
2041-8213
2041-8213
Volume Title
841
Publisher
IOP Publishing
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Sponsorship
European Research Council (308024)
Science and Technology Facilities Council (ST/N000927/1)
Science and Technology Facilities Council (ST/N004493/1)
Science and Technology Facilities Council (ST/N000927/1)
Science and Technology Facilities Council (ST/N004493/1)
The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen's University Belfast, the Harvard Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation.
The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 308024. This project is supported by CONICYT's PCI program through grant DPI20140066. C.N. acknowledges support from CONICYT-PCHA grant Doctorado Nacional 2015-21151643. S.K. thanks Bernie Shiao for the assistance in retrieving the PS1 data. C.N. thanks Francisco Aros for his useful suggestion on the improvements of the figures.