The X-ray source population of the globular cluster M15: Chandra high resolution imaging

Abstract

The globular cluster M15 was observed on three occasions with the High Resolution Camera on board Chandra in 2001 in order to investigate the X-ray source population in the cluster centre. After subtraction of the two bright central sources, four faint sources were identified within 50 arcsec of the core. One of these sources is probably the planetary nebula, K648, making this the first positive detection of X-rays from a planetary nebula inside a globular cluster. Another two are identified with UV variables (one previously known), which we suggest are cataclysmic variables (CVs). The nature of the fourth source is more difficult to ascertain, and we discuss whether it is possibly a quiescent soft X-ray transient (qSXT) or also a CV.

9 pages, 6 figures, accepted for publication in MNRAS. Original figures can be obtained from http://www.astro.helsinki.fi/~diana/M15.html

References in corpus (27)

• First Results from the X-ray and Optical Survey of the Chandra Deep Field South
• Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in the Globular Cluster M15: II. Kinematical Analysis and Dynamical Modeling
• Analysis of the Quiescent Low-Mass X-ray Binary Population in Galactic Globular Clusters
• On the central structure of M15
• White Dwarfs in Globular Clusters: HST Observations of M4
• Quiescent Thermal Emission from the Neutron Star in Aql X-1
• Addendum: "Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in the Globular Cluster M15: II. Kinematical Analysis and Dynamical Modeling"
• Optical Identification of Multiple Faint X-ray Sources in the Globular Cluster NGC 6752: Evidence for Numerous Cataclysmic Variables
• Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in the Globular Cluster M15: I. STIS Spectroscopy and WFPC2 Photometry
• Chandra Observation of the Globular Cluster NGC 6440 and the Nature of Cluster X-ray Luminosity Functions
• Discovery of Extended X-ray Emission from the Planetary Nebula NGC 7027 by the Chandra X-ray Observatory
• Chandra X-ray Observatory Detection of Extended X-ray Emission from the Planetary Nebula BD+303639
• The Enigmatic X-ray Point Sources at the Central Stars of NGC 6543 and NGC 7293
• A Chandra Study of the Dense Globular Cluster Terzan 5
• ROSAT observations of X-ray emission from planetary nebulae
• Identification of the LMXB and Faint X-ray Sources in NGC 6652
• Hubble Space Telescope Observations of the Planetary Nebula K648 in the Globular Cluster M15
• Globular Cluster Photometry with the Hubble Space Telescope. V. WFPC2 Study of M15's Central Density Cusp
• HST/STIS UV Spectroscopy of Two Quiescent X-ray Novae: A0620-00 and Centaurus X-4
• Deep HST/FOC Imaging of the Central Density Cusp of the Globular Cluster M15
• A Stringent Limit on the Accretion Luminosity of the Possible Central Black Hole in the Globular Cluster M15
• Detection of a Quiescent Low Mass X-Ray Binary Companion in 47 Tucanae
• X-Ray Emission from Central Binary Systems of Planetary Nebulae
• X-ray and UV Variability in the Core of M15: the nature of X2127+119/AC211
• A Chandra observation of the globular cluster Terzan 1: the neutron-star X-ray transient X 1732-304 in quiescence
• Understanding the LMXB X2127+119 in M15 I. X-ray eclipses and dips
• The Optical Identification of the X-ray Burster X1746-370 in the Globular Cluster NGC6441

Cited by in corpus (17)

• Formation and evolution of compact binaries in globular clusters: I.Binaries with white dwarfs
• An ultracompact X-ray binary in the globular cluster M15 (NGC7078)
• The first low-mass black hole X-ray binary identified in quiescence outside of a globular cluster
• The Discovery of a Very Faint X-ray Transient in the Globular Cluster M15
• Unveiling the core of the Globular Cluster M15 in the Ultraviolet
• An Examination of the X-ray Sources in the Globular Cluster NGC 6652
• No evidence for a central IMBH in M15
• Galactic Ultracompact X-ray Binaries: Empirical Luminosities
• X-ray Localization of the Globular Cluster G1 with XMM-Newton
• Formation of ultra-compact X-ray binaries through circum-binary disk-driven mass transfer
• The MAVERIC Survey: Variable Jet-Accretion Coupling in Luminous Accreting Neutron Stars in Galactic Globular Clusters
• Far-Ultraviolet Observation of the Globular Cluster NGC 6397
• Cluster AgeS Experiment (CASE): Deficiency of observed dwarf novae in globular clusters
• UV-Bright Stellar Populations and Their Evolutionary Implications in the Collapsed-Core Cluster M15
• Hubble Space Telescope Snapshot Search for Planetary Nebulae in Globular Clusters of the Local Group
• State Transitions in Ultracompact Neutron Star LMXBs: towards the Low Luminosity Limit
• Reevaluating the Origin of Detectable Cataclysmic Variables in Globular Clusters: Testing the Importance of Dynamics