XMM-Newton study of X-ray sources in the field of Willman 1 dwarf spheroidal galaxy

Abstract

We present the results of the analysis of three XMM-Newton observations of the Willman 1 dwarf spheroidal galaxy (Wil 1). X-ray sources are classified on the basis of spectral analysis, hardness ratios, X-ray-to-optical flux ratio, X-ray variability, plus cross-correlation with available catalogues in optical and infrared wavelengths. We catalogued 97 sources in the field of Wil 1. Our classification shows the presence of a $\beta$-type symbiotic star in Wil 1. We classified one M dwarf foreground star in the field of Wil 1. Moreover, fifty-four sources are classified as background AGNs and galaxies. Our study shows that the luminosity of the X-ray sources of Wil 1 does not exceed $\sim$10${}^{34}$ erg s${}^{-1}$ in the energy range of 0.2--12.0 keV, which is similar to observed luminosities of sources in nearby dwarf spheroidal galaxies.

arXiv comment20 pages, 10 Figures, Accepted MNRAS 11 September 2020

References in corpus (43)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Seventh Data Release of the Sloan Digital Sky Survey
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• The observed properties of dwarf galaxies in and around the Local Group
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• Star Formation Histories, Abundances and Kinematics of Dwarf Galaxies in the Local Group
• The Star Formation Histories of Local Group Dwarf Galaxies I. Hubble Space Telescope / Wide Field Planetary Camera 2 Observations
• Revised Catalog of GALEX Ultraviolet Sources. I. The All-sky Survey: GUVcat_AIS
• A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite?
• X-ray source populations in galaxies
• The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data
• The first XMM-Newton slew survey catalogue: XMMSL1
• X-ray Emissions from Accreting White Dwarfs: a Review
• A Keck/DEIMOS spectroscopic survey of faint Galactic satellites: searching for the least massive dwarf galaxies
• The Neutron Stars of Soft X-Ray Transients
• The WISE AGN Catalog
• The UV and X-ray activity of the M dwarfs within 10pc of the Sun
• Finding counterparts for All-sky X-ray surveys with Nway: a Bayesian algorithm for cross-matching multiple catalogues
• Willman 1 - a probable dwarf galaxy with an irregular kinematic distribution
• Symbiotic stars in X-rays
• Decision Tree Classifiers for Star/Galaxy Separation
• XMM-Newton observations of polars in low accretion states
• XMM-Newton survey of M 31
• The faintest accretors
• Bayesian High-Redshift Quasar Classification from Optical and Mid-IR Photometry
• Dark Matter Search Using XMM-Newton Observations of Willman 1
• ASCA Observation of the New Transient X-ray Pulsar XTE J0111.2-7317 in the Small Magellanic Cloud
• The discovery of X-ray binaries in the Sculptor Dwarf Spheroidal Galaxy
• X-ray binaries in Sculptor
• Population synthesis of classical low-mass X-ray binaries in the Galactic Bulge
• A compilation of known QSOs for the Gaia mission
• X-ray source population study of the starburst galaxy M83 with XMM-Newton
• XMM-Newton observation of a sample of four close dSph galaxies
• A search for stellar X-ray sourcesin the Sagittarius and Carina dwarf galaxies - I: X-ray observations
• The Southern 2MASS AGN Survey: spectroscopic follow-up with 6dF
• Classification of low-luminosity stellar X-ray sources in the field of the Draco dwarf spheroidal galaxy
• Luminosity function of binary X-ray sources calculated using the Scenario Machine
• Multiwavelength survey of X-ray sources in the Sculptor Dwarf Spheroidal Galaxy

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• Symbiotic stars in the era of modern ground- and space-based surveys
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• Broad Observational Perspectives Achieved by the Accreting White Dwarf Sciences in the XMM-Newton and Chandra Eras
• eROSITA (eRASS1) study of the Canis Major overdensity: Developing a multi-wavelength algorithm for classifying faint X-ray sources
• Willman 1 Revisited: The Kinematics, Chemistry, and Orbital Properties of a Potentially-Disrupting Dwarf Galaxy