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 investigate the circumstellar disc fraction as determined from L-bandexcess observations of the young, massive Arches and Quintuplet clustersresiding in the central molecular zone of the Milky Way. The Quintuplet clusterwas searched for L-band excess sources for the first time. We find a total of26 excess sources in the Quintuplet cluster and 21 in the Arches cluster, ofwhich 13 are new detections. With the aid of proper motion membership samples,the disc fraction of the Quintuplet cluster was derived for the first time tobe 4.0 +/- 0.7%. There is no evidence for a radially varying disc fraction inthis cluster. In the case of the Arches cluster, a disc fraction of 9.2 +/-1.2% approximately out to the cluster's predicted tidal radius, r < 1.5 pc, isobserved. This excess fraction is consistent with our previously found discfraction in the cluster in the radial range 0.3 < r < 0.8 pc. In both clusters,the host star mass range covers late A- to early B-type stars, 2 < M < 15 Msun,as derived from J-band photospheric magnitudes. We discuss the unexpectedfinding of dusty circumstellar discs in these UV intense environments in thecontext of primordial disc survival and formation scenarios of secondary discs.We consider the possibility that the L-band excess sources in the Arches andQuintuplet clusters could be the high-mass counterparts to T Tauripre-transitional discs. As such a scenario requires a long pre-transitionaldisc lifetime in a UV intense environment, we suggest that mass transfer discsin binary systems are a likely formation mechanism for the B-star discsobserved in these starburst clusters.

Circumstellar discs in Galactic centre clusters: Disc-bearing B-type stars in the Quintuplet and Arches clusters