The Next Generation Virgo Cluster Survey. XVII. A Search for Planetary Nebulae in Virgo Cluster Globular Clusters

Weijia Sun, Eric W. Peng, Youkyung Ko, Patrick Côté, Laura Ferrarese, Myung Gyoon Lee, Chengze Liu, Alessia Longobardi, Igor V. Chilingarian, Chelsea Spengler, Ann I. Zabludoff, Hong Xin Zhang, Jean Charles Cuillandre, Stephen D.J. Gwyn

Research output: Contribution to journalArticlepeer-review

Abstract

The occurrence of planetary nebulae (PNe) in globular clusters (GCs) provides an excellent chance to study low-mass stellar evolution in a special (low-metallicity, high stellar density) environment. We report a systematic spectroscopic survey for the [O iii] 5007 Å emission line of PNe in 1469 Virgo GCs and 121 Virgo ultra-compact dwarfs (UCDs), mainly hosted in the giant elliptical galaxies M87, M49, M86, and M84. We detected zero PNe in our UCD sample and discovered one PN (M5007=-4.1 mag) associated with an M87 GC. We used the [O iii] detection limit for each GC to estimate the luminosity-specific frequency of PNe, α, and measured α in the Virgo cluster GCs to be . The value of α in the Virgo GCs is among the lowest reported in any environment, due in part to the large sample size, and it is 5-6 times lower than that for the Galactic GCs. We suggest that α decreases toward brighter and more massive clusters, sharing a similar trend as the binary fraction, and the discrepancy between the Virgo and Galactic GCs can be explained by the observational bias in extragalactic surveys toward brighter GCs. This low but nonzero efficiency in forming PNe may highlight the important role played by binary interactions in forming PNe in GCs. We argue that a future survey of less massive Virgo GCs will be able to determine whether PN production in the Virgo GCs is governed by an internal process (mass, density, binary fraction) or if it is largely regulated by the external environment.

Original languageEnglish (US)
Article number145
JournalAstrophysical Journal
Volume885
Issue number2
DOIs
StatePublished - Nov 10 2019

Keywords

  • galaxies: Individual (M87, M49, M86, M84)
  • globular clusters: General
  • planetary nebulae: General

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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