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

Recent observations of the low-mass pre-main sequence, eccentricspectroscopic binaries DQ Tau and V773 Tau A reveal that their millimeterspectrum is occasionally dominated by flares from non-thermal emissionprocesses. The transient activity is believed to be synchrotron in nature,resulting from powerful magnetic reconnection events when the separate magneticstructures of the binary components are capable of interacting and forced toreorganize, typically near periastron. We conducted the first systematic studyof the millimeter variability toward a sample of 12 PMS spectroscopic binarieswith the aim to characterize the proliferation of flares amongst sources likelyto experience similar interbinary reconnection events. The source sampleconsists of short-period, close-separation binaries that possess either a highorbital eccentricity or a circular orbit. Using the MAMBO2 array on the IRAM30m telescope, we carried out continuous monitoring at 1.25 mm over a 4-nightperiod during which all of the high-eccentricity binaries approachedperiastron. We also obtained simultaneous optical VRI measurements, since astrong link is often observed between stellar reconnection events and opticalbrightenings. UZ Tau E is the only source to be detected at millimeterwavelengths: it exhibited significant variation; it is also the only source toundergo strong simultaneous optical variability. The binary possesses thelargest orbital eccentricity in the current sample, a predicted factor instar-star magnetic interaction events. With orbital parameters and variableaccretion activity similar to DQ Tau, the millimeter behavior of UZ Tau E drawsmany parallels to the DQ Tau model for colliding magnetospheres. However, onthe basis of our observations alone, we cannot determine whether thevariability is repetitive, or if it could also be due to variable free-freeemission in an ionized wind.

Hunting for millimeter flares from magnetic reconnection in pre-main sequence spectroscopic binaries