YSO jets in the Galactic Plane from UWISH2: IV - Jets and outflows in Cygnus-X

摘要: We have performed an unbiased search for outflows from young stars in Cygnus-X using 42 deg$^2$ of data the UKIRT Widefield Infrared Survey H$_2$ (UWISH2 survey), to identify shock-excited near-IR emission 1$-$0 S(1) 2.122 $\mu$m line. uncovered 572 outflows, which 465 are new discoveries, increasing number known objects by more than 430%. This large and sample allows us statistically determine typical properties stars. We found 261 bipolar 16% these parsec-scale. The outflow is 0.45pc length has gaps 0.025 0.1pc between knots. median luminosity line 10$^{-3}$ L$_{\odot}$. flows typically asymmetrical, with two lobes misaligned 5$^{\circ}$, one lobe 30% shorter other, twice as bright other. Of remaining 152 single-sided 159 groups extended, without identifiable driving sources. Half all sources sufficient WISE their evolutionary status either protostars (80%) or classical T-Tauri (20%). One fifth variable 0.5mag K-band continuum over several years. Several newly-identified provide excellent targets follow up studies. particularly encourage study identified a bright-rimmed cloud near IRAS 20294$+$4255, seems represent textbook example triggered star formation.