ChaMPlane Discovery of Candidate Symbiotic Binaries in Baade's and Stanek's Windows
arXiv:astro-ph/0606335 · doi:10.1086/506613
Abstract
We have searched the OGLE-II archive for candidate counterparts of X-ray sources detected in two low-extinction windows included in our Galactic bulge Chandra/HST survey. We find that a significant number - i.e. in excess of the expected level of random associations - can be matched with probable M-giants. Their X-ray properties can be understood if these sources are symbiotic binaries where the X-rays are typically, either directly or indirectly, the result of a white dwarf accreting from the wind of a cool giant. Optical and near-infrared properties of selected sources are consistent with a symbiotic nature, although none of the spectra collected for 8 out of 13 candidate counterparts show the high-ionization nebular emission lines observed for many symbiotics. The hard X-ray emission for several sources (power-law photon indices -1.5 ~< Gamma ~< 1.5) suggests our sample includes systems similar to the symbiotics recently detected with INTEGRAL and Swift.
arXiv comment4 pages, 3 figures (1 color figure), accepted for publication in ApJ Letters
References in corpus (16)
- Database of Geneva stellar evolution tracks and isochrones for UBVRIJHKLL'M, HST-WFPC2, Geneva and Washington photometric systems
- NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars
- A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center
- Extinction Map of the Galactic center: OGLE-II Galactic bulge fields
- X-ray Processing of ChaMPlane Fields: Methods and Initial Results for Selected Anti-Galactic Center Fields
- A "Combination Nova" Outburst in Z Andromedae: Nuclear Shell Burning Triggered by a Disk Instability
- New spectral classification technique for X-ray sources: quantile analysis
- Synthetic Spectra and Color-Temperature Relations of M Giants
- M Dwarfs from Hubble Space Telescope Star Counts. IV
- M-type giants as optical counterparts of X-ray sources 4U 1700+24 and 4U 1954+319
- Mass-Losing Semiregular Variable Stars in Baade's Windows
- Chandra Multiwavelength Plane (ChaMPlane) Survey: an Introduction
- Constraining the Nature of the Galactic Center X-ray Source Population
- Infrared Spectroscopy of GX 1+4/V2116 Oph: Evidence for a Fast Red Giant Wind?
- ChaMPlane Optical Survey: Mosaic Photometry
- M giants in Macho, DENIS and Isogal
Cited by in corpus (18)
- X-ray Emissions from Accreting White Dwarfs: a Review
- Stellar Proper Motions in the Galactic Bulge from deep HST ACS/WFC Photometry
- Swift Observations of Hard X-ray Emitting White Dwarfs in Symbiotic Stars
- Resolving the Galactic X-ray background
- A Deep X-ray Survey of the Globular Cluster Omega Centauri
- Dominance of Magnetic Cataclysmic Variables in the Resolved Galactic Ridge X-ray Emission of the Limiting Window
- The MAVERIC Survey: Chandra/ACIS Catalog of Faint X-ray sources in 38 Galactic globular clusters
- The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results
- An Apparent Hard X-ray Decline of CH Cygni
- CXOGBS~J173620.2--293338: A Candidate Symbiotic X-ray Binary Associated with a Bulge Carbon Star
- ChaMPlane Deep Galactic Bulge Survey. I. Faint accretion-driven binaries in the Limiting Window
- The ChaMPlane bright X-ray sources - Galactic longitudes l = 2-358 deg
- Revealing a new symbiotic X-ray binary with Gemini NIFS
- Spectroscopic Follow-up of X-ray Sources in the ChaMPlane Survey: Identification of a New Cataclysmic Variable
- Candidate isolated neutron stars in the 4XMM-DR10 catalog of X-ray sources
- Chandra Discovery of an Intermediate Polar in Baade's Window
- Near-Infrared Spectroscopy of Faint Discrete X-ray Point Sources Constituting the Galactic Ridge X-ray Emission
- On the origin of the near-infrared emission from the neutron-star low-mass X-ray binary GX 9+1