9 citations · 29 across the 5 of their papers we have counts for
5 papers
Interstellar Nitrogen Isotope Ratios: Measurements on tracers of CN and CN
J. L. Chen, J. S. Zhang, C. Henkel +6
The nitrogen isotope ratio 14N/15N is a powerful tool to trace Galactic stellar nucleosynthesis and constraining Galactic chemical evolution. Previous observations have found lower…
Sulfur isotope ratios in the Large Magellanic Cloud
Y. Gong, C. Henkel, K. M. Menten +11
Sulfur isotope ratios have emerged as a promising tool for tracing stellar nucleosynthesis, quantifying stellar populations, and investigating the chemical evolution of galaxies. W…
A Possible Chemical Clock in High-mass Star-forming Regions: N(HC3N)/N(N2H+)?
Y. X. Wang, J. S. Zhang, H. Z. Yu +5
We conducted observations of multiple HC3N (J = 10-9, 12-11, and 16-15) lines and the N2H+ (J = 1-0) line toward a large sample of 61 ultracompact (UC) H II regions, through the In…
Interstellar Nitrogen Isotope Ratios: New NH3 Data from the Galactic Center out to the Perseus Arm
J. L. Chen, J. S. Zhang, C. Henkel +10
Our aim is to measure the interstellar 14N/15N ratio across the Galaxy, to establish a standard data set on interstellar ammonia isotope ratios, and to provide new constraints on t…
Discovery of ammonia (9,6) masers in two high-mass star-forming regions
Y. T. Yan, C. Henkel, K. M. Menten +8
Molecular maser lines are signposts of high-mass star formation, probing excitation and kinematics of very compact regions in the close environment of young stellar objects and pro…