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 harbor hydrogen rich donor stars. As with other (sometimes confirmed) ultracompact LMXBs, 2S 0918–549 is observed to have a high neon-to-oxygen abundance ratio (Juett et al. 2001, ApJ, 560, L59) which has been used to argue that the companion star is a CO or ONe white dwarf. However, type-I X-ray bursts have been observed from several of these systems implying the presence of hydrogen or helium on the neutron star surface. In this paper, we argue that the companion star in 2S 0918–549 is a helium white dwarf. We first present a type-I X-ray burst from 2S ...
Context. Ultra-luminous X-ray sources (ULXs) are those X-ray sources located away from the centre of...
We discovered that HD 188112, a bright (V = $\rm 10 \stackrel{m}{.} 2$), nearby (80 pc) B-ty...
Aims. We model the present-day population of classical low-mass X-ray binaries (LMXBs) with neutron ...
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it is...
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it i...
We study the formation of neon-enriched donor stars in ultracompact X-ray binaries $(P_{{\rm orb}} ...
In this thesis we investigate the formation and evolution of compact binaries. Chapters 2 through 4 ...
We present a set of calculations of the evolution of low-mass, solar composition stars in close bina...
Context. Millisecond pulsars (MSPs) are generally believed to be old neutron stars (NSs) that have b...
Context. Ultracompact X-ray binaries (UCXBs) typically consist of a white dwarf donor and a neutron ...
We study the evolution of a system composed of a 1.4-M⊙ neutron star and a normal, solar composition...
Context. A large number of low-mass (≲0.20 M⊙) helium white dwarfs (He WDs) have recently been disco...
We propose a formation channel for the previously unexplained helium-rich subdwarf O (He-rich sdO) s...
Contains fulltext : 101517.pdf (publisher's version ) (Open Access)Ultracompact X-...
With the hypothesis that the 5.4 minute binary RX J0806.3+1527 consists of a low-mass helium white d...
Context. Ultra-luminous X-ray sources (ULXs) are those X-ray sources located away from the centre of...
We discovered that HD 188112, a bright (V = $\rm 10 \stackrel{m}{.} 2$), nearby (80 pc) B-ty...
Aims. We model the present-day population of classical low-mass X-ray binaries (LMXBs) with neutron ...
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it is...
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it i...
We study the formation of neon-enriched donor stars in ultracompact X-ray binaries $(P_{{\rm orb}} ...
In this thesis we investigate the formation and evolution of compact binaries. Chapters 2 through 4 ...
We present a set of calculations of the evolution of low-mass, solar composition stars in close bina...
Context. Millisecond pulsars (MSPs) are generally believed to be old neutron stars (NSs) that have b...
Context. Ultracompact X-ray binaries (UCXBs) typically consist of a white dwarf donor and a neutron ...
We study the evolution of a system composed of a 1.4-M⊙ neutron star and a normal, solar composition...
Context. A large number of low-mass (≲0.20 M⊙) helium white dwarfs (He WDs) have recently been disco...
We propose a formation channel for the previously unexplained helium-rich subdwarf O (He-rich sdO) s...
Contains fulltext : 101517.pdf (publisher's version ) (Open Access)Ultracompact X-...
With the hypothesis that the 5.4 minute binary RX J0806.3+1527 consists of a low-mass helium white d...
Context. Ultra-luminous X-ray sources (ULXs) are those X-ray sources located away from the centre of...
We discovered that HD 188112, a bright (V = $\rm 10 \stackrel{m}{.} 2$), nearby (80 pc) B-ty...
Aims. We model the present-day population of classical low-mass X-ray binaries (LMXBs) with neutron ...