Formation and Evolution of Galactic Intermediate/Low-Mass X-ray Binaries

Abstract

We investigate the formation and evolutionary sequences of Galactic intermediate- and low-mass X-ray binaries (I/LMXBs) by combining binary population synthesis (BPS) and detailed stellar evolutionary calculations. Using an updated BPS code we compute the evolution of massive binaries that leads to the formation of incipient I/LMXBs, and present their distribution in the initial donor mass vs. initial orbital period diagram. We then follow the evolution of I/LMXBs until the formation of binary millisecond pulsars (BMSPs). We find that the birthrate of the I/LMXB population is in the range of $9\times 10^{-6}-3.4\times 10^{-5}\mathrm{y}{\mathrm{r}}^{-1}$, compatible with that of BMSPs which are thought to descend from I/LMXBs. We show that during the evolution of I/LMXBs they are likely to be observed as relatively compact binaries with orbital periods $\lesssim$ 1 day and donor masses $\lesssim 0.3M_{\odot }$. The resultant BMSPs have orbital periods ranging from less than 1 day to a few hundred days. These features are consistent with observations of LMXBs and BMSPs. We also confirm the discrepancies between theoretical predications and observations mentioned in the literature, that is, the theoretical average mass transfer rates ($\sim 10^{-10}{M}_{\odot }$\,yr${}^{-1}$) of LMXBs are considerably lower than observed, and the number of BMSPs with orbital periods $\sim 0.1-10$ day is severely underestimated. These discrepancies imply that something is missing in the modeling of LMXBs, which is likely to be related to the mechanisms of the orbital angular momentum loss.

30 pages, 13 figures

References in corpus (15)

• The ATNF Pulsar Catalogue
• A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition)
• The Remarkable Deaths of 9 - 11 Solar Mass Stars
• The Supernova Channel of Super-AGB Stars
• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• Formation of millisecond pulsars with CO white dwarf companions - II. Accretion, spin-up, true ages and comparison to MSPs with He white dwarf companions
• On the formation of Be stars through binary interaction
• Populating the Galaxy with low-mass X-ray binaries
• The formation of low-mass helium white dwarfs orbiting pulsars: Evolution of low-mass X-ray binaries below the bifurcation period
• Orbital Period and Outburst Luminosity of Transient Low Mass X-ray Binaries
• The Quasi-Roche lobe overflow state in the evolution of Close Binary Systems containing a radio pulsar
• Formation of Millisecond Pulsars with Low-Mass Helium White Dwarf Companions in Very Compact Binaries
• Is irradiation important for the secular evolution of low-mass X-ray binaries?
• Formation of Black Hole Low-Mass X-ray Binaries
• The Connection Between Low-Mass X-ray Binaries and (Millisecond) Pulsars: A Binary Evolution Perspective

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• Convection and rotation boosted prescription of magnetic braking: application to the formation of extremely low-mass white dwarfs
• Constraining Progenitors of Observed LMXBs Using CARB Magnetic Braking
• The Formation of Electron-capture Supernovae: A Review
• A possible formation scenario of the Gaia ID 3425577610762832384: inner binary merger inside a triple common envelope
• On the rapid orbital expansion in the compact low-mass X-ray binary 2A 1822$-$371
• Ultra-compact X-ray Binaries: A Review