Optical spectra of the carbon-oxygen accretion discs in the ultra-compact X-ray binaries 4U 0614+09, 4U 1543-624 and 2S 0918-549

  title={Optical spectra of the carbon-oxygen accretion discs in the ultra-compact X-ray binaries 4U 0614+09, 4U 1543-624 and 2S 0918-549},
  author={G. A. Nelemans and Peter G. Jonker and Thomas R. Marsh and Michiel van der Klis},
  journal={Monthly Notices of the Royal Astronomical Society},
  • G. Nelemans, P. Jonker, +1 author M. Klis
  • Published 1 December 2003
  • Physics, Materials Science
  • Monthly Notices of the Royal Astronomical Society
We present optical spectra in the range 4600‐8600 ˚ A for three low-mass X-ray binaries which have been suggested to belong to the class of ultra-compact X-ray binaries based on their X-ray spectra. Our spectra show no evidence for hydrogen or helium emission lines, as are seen in classical X-ray binaries. The spectrum of 4U 0614+09 does show emission lines, which we identify with carbon and oxygen lines of C II ,C III ,O II and O III. While the spectra of 4U 1543−624 and 2S 0918−549 have a… Expand

Figures and Tables from this paper

X-ray diagnostics of chemical composition of the accretion disc and donor star in ultra-compact X-ray binaries
We search for the Fe Kα line in spectra of Ultra Compact X-ray Binaries (UCXBs). For this purpose we have analyzed XMM-Newton observations of five confirmed UCXBs. We find that the object 2S 0918-549Expand
X-ray reflection in oxygen-rich accretion discs of ultracompact X-ray binaries
We present spectroscopic X-ray data of two candidate ultra-compact X-ray binaries: 4U 0614+091 and 4U 1543−624. We confirm the presence of a broad O VIII Lyα reflection line (at≈ 18 A) usingExpand
We observed the ultra-compact binary candidate 4U 0614+091 for a total of 200 ks with the high-energy transmission gratings on board the Chandra X-ray Observatory. The source is found at variousExpand
Optical spectroscopy of (candidate) ultracompact X-ray binaries: constraints on the composition of the donor stars
We present optical spectroscopy of several (candidate) ultracompact X-ray binaries (UCXBs) obtained with the European Southern Observatory Very Large Telescope and Gemini-North telescopes. In onlyExpand
Spitzer Reveals Infrared Optically Thin Synchrotron Emission from the Compact Jet of the Neutron Star X-Ray Binary 4U 0614+091
Spitzer observations of the neutron star (ultracompact) X-ray binary (XRB) 4U 0614+091 with the Infrared Array Camera reveal emission of nonthermal origin in the range 3.5-8 μm. The mid-infraredExpand
VLT spectroscopy and non-LTE modeling of the C/O-dominated accretion disks in two ultracompact X-ray binaries
Aims. We present new medium-resolution high-S/N optical spectra of the ultracompact low-mass X-ray binaries 4U 0614+091 and 4U 1626-67, taken with the ESO Very Large Telescope. They are pure emissionExpand
On the possibility of a helium white dwarf donor in the presumed ultracompact binary 2S 0918-549
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it is an ultracompact binary with an orbital period shorter than 60 min. Such binaries cannot harborExpand
X-Ray Spectroscopy of Candidate Ultracompact X-Ray Binaries
We present high-resolution spectroscopy of the neutron star/low-mass X-ray binaries (LMXBs) 4U 1850-087 and 4U 0513-40 as part of our continuing study of known and candidate ultracompact binaries.Expand
Time-resolved X-Shooter spectra and RXTE light curves of the ultra-compact X-ray binary candidate 4U 0614+091 ⋆
In this paper we present X-Shootertime resolved spectroscopy and RXTE PCAlight curves of the ultra-compact X-ray binary candidate 4U 0614+091. The X-Shooter data are compared to the GMOS dataExpand
On the ultra-compact nature of the neutron star system 1RXS J170854.4−321857: insights from X-ray spectroscopy
The relatively small family of ultra-compact X-ray binary systems is of great interest for many areas of astrophysics. We report on a detailed X-ray spectral study of the persistent neutron starExpand


X-Ray Spectroscopy of the Low-Mass X-Ray Binaries 2S 0918?549 and 4U 1543?624: Evidence for Neon-rich Degenerate Donors
We present high-resolution spectroscopy of the neutron star/low-mass X-ray binaries 2S 0918-549 and 4U 1543-624 with the High Energy Transmission Grating Spectrometer on board the Chandra X-RayExpand
Ultracompact X-ray binaries with neon-rich degenerate donors
There are three low-mass X-ray binaries (4U 0614+091, 2S 0918-549, and 4U 1543-624) for which broad-line emission near 0.7 keV was previously reported. A recent high-resolution observation of 4UExpand
Anticorrelated Hard/Soft X-Ray Emission from the X-Ray Burster 4U 0614+091
We have detected transient X-ray activity from the X-ray burster 4U 0614+091 simultaneously with BATSE on board the Compton Gamma Ray Observatory (20-100 keV) and the all-sky monitor (ASM) on boardExpand
On the formation of neon-enriched donor stars in ultracompact X-ray binaries
We study the formation of neon-enriched donor stars in ultracompact X-ray binaries (Porb < 80 min) and show that their progenitors have to be low-mass (0.3{0.4)M \hybrid" white dwarfs (with CO coresExpand
Optical and X-ray observations of 3U 0614+09
Based on positional agreement, ultraviolet excess, and spectroscopic peculiarity, the identification of the X-ray source 3U 0614+09 with a faint blue star, previously suggested by Murdin et al.Expand
We present the results of a systematic study of the evolution of low- and intermediate-mass X-ray binaries (LMXBs and IMXBs). Using a standard Henyey-type stellar evolution code and a standard modelExpand
Discovery of a Kilohertz Quasi-periodic Oscillation in 2S 0918-549
We report the discovery of a kilohertz quasi-periodic oscillation (kHz QPO) in the low-mass X-ray binary (LMXB) 2S 0918-549. The kHz QPO has a frequency of 1156 ± 9 Hz, an FWHM of 70 ± 20 Hz, and aExpand
The case for a burst from 3U 0614+09. [flare star observations]
A single flare event with a rise time of about 7 s and a decay time of approximately 40 s was observed by the Goddard cosmic X-ray spectroscopy experiment on OSO-8 during observations of 3U 0614+09Expand
A catalogue of low-mass X-ray binaries
We present a catalogue of low-mass X-ray binaries. The catalogue is an updated version of the catalogue of van Paradijs (1995). This new catalogue contains 150 sources, 31 new low-mass X-ray binariesExpand