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 examine the conditions of the plasma along a sample of 'classical'Herbig-Haro jets located in the Orion and Vela star forming regions, throughcombined optical-infrared spectral diagnostics. Our sample includes HH 111, HH34, HH 83, HH 73, HH 24 C/E, HH 24 J, observed at moderate spatial/spectralresolution. The obtained spectra cover a wide wavelength range from 0.6-2.5 um,including many transitions from regions of different excitation conditions.This allows us to probe the density and temperature stratification whichcharacterises the cooling zones behind the shock fronts along the jet. Thederived physical parameters (such as the extinction, the electron density andtemperature, the ionisation fraction, and the total density) are used toestimate the depletion onto dust grains of Calcium and Iron with respect tosolar abundances. This turns out to be between 70% and 0% for Ca and ~90% forFe, suggesting that the weak shocks present in the beams are not capable ofcompletely destroying the dust grains. We then derive the mass flux rates(Mdot_jet is on average 5 10^-8 M_solar yr^-1) and the associated linearmomentum fluxes. The latter are higher than, or of the same order as, thosemeasured in the coaxial molecular flows, suggesting that the flows are jetdriven. Finally, we discuss differences between jets in our sample.Comment: 19 pages, 15 figures, accepted by A&

Recipes for stellar jets: results of combined optical/infrared diagnostics