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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We searched for infrared counterparts to the cluster of X-ray point sourcesdiscovered by Chandra in the Galactic Center Region (GCR). While the sourcescould be white dwarfs, neutron stars, or black holes accreting from stellarcompanions, their X-ray properties are consistent with magnetic CataclysmicVariables, or High Mass X-ray Binaries (HMXB) at low accretion-rates. A directway to decide between these possibilities and hence between alternativeformation scenarios is to measure or constrain the luminosity distribution ofthe companions. Using infrared (J, H, K, Br-gamma) imaging, we searched forcounterparts corresponding to typical HMXB secondaries: spectral type B0V withK<15 at the GCR. We found no significant excess of bright stars in Chandraerror circles, indicating that HMXBs are not the dominant X-ray sourcepopulation, and account for fewer than 10% of the hardest X-ray sources.Comment: 4 pages, 3 figures, 1 table, accepted in ApJ Letters for publicatio

Constraining the Nature of the Galactic Center X-Ray Source Population