English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We have studied the X-ray luminosity function (XLF) of low-mass X-raybinaries (LMXBs) in the nearby lenticular galaxy NGC 3115, using the MegasecondChandra X-Ray Visionary Project Observation. With a total exposure time of ~1.1Ms, we constructed the XLF down to a limiting luminosity of ~10^36 erg/s, muchdeeper than typically reached for other early-type galaxies. We foundsignificant flattening of the overall LMXB XLF from dN/dL \proptoL^{-2.2\pm0.4} above 5.5x10^37 erg/s to dN/dL \propto L^{-1.0\pm0.1} below it,though we could not rule out a fit with a higher break at ~1.6x10^38 erg/s. Wealso found evidence that the XLF of LMXBs in globular clusters (GCs) is overallflatter than that of field LMXBs. Thus our results for this galaxy do notsupport the idea that all LMXBs are formed in GCs. The XLF of field LMXBs seemsto show spatial variation, with the XLF in the inner region of the galaxy beingflatter than that in the outer region, probably due to contamination of LMXBsfrom undetected and/or disrupted GCs in the inner region. The XLF in the outerregion is probably the XLF of primordial field LMXBs, exhibiting dN/dL \proptoL^{-1.2\pm0.1} up to a break close to the Eddington limit of neutron star LMXBs(~1.7x10^38 erg/s). The break of the GC LMXB XLF is lower, at ~1.1x10^37 erg/s.We also confirm previous findings that the metal-rich/red GCs are more likelyto host LMXBs than the metal-poor/blue GCs, which is more significant for moreluminous LMXBs, and that more massive GCs are more likely to host LMXBs.

The Megasecond Chandra X-Ray Visionary Project Observation of NGC 3115 (III): luminosity functions of LMXBs and dependence on stellar environments