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

High-resolution spectroscopy and photometric monitoring of the pre-mainsequence star RXJ1608.6-3922 shows that it is not an eclipsing binary, aspreviously claimed. Radial velocity measurements covering suitable time spansin order to detect a spectroscopic binary with the claimed period of about 7days have been performed. The scatter of the radial velocity does not exceed2.4 km/s, defining an upper mass limit of 24 Jupiter masses for any eclipsingcompanion orbiting this star with the claimed period. Photometric observationsof RXJ1608.6-3922 in 7 consecutive nights (i.e. as long as the claimed orbitalperiod) reveal brightness variations of the order of 0.2 mag with a period of3.6 days. The shape of the detected light curve differs from a light curve ofthe star recorded in 1996. The small variations of the radial velocity, thevariable shape of the light curve, as well as (B-V) color variations suggestthat the flux of RXJ 1608.6-3922 is modulated by spots on the stellar surfacewith a rotational period of 3.6 days. The stellar activity of this star seemsto be highly variable, taking into account the variable shape of the lightcurve, with an amplitude varying from 0.5 to 0.2 mag in a few years, as well ashints for a variable H$_{\alpha}$ equivalent width.Comment: 9 pages, 6 figures. A&A in pres

The T Tauri star RX J1608.6-3922 -not an eclipsing binary but a spotted single star