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Sabyasachi Chattopadhyay — Challenges and opportunities with fibre spectroscopy
Oct 21 @ 11:00 am - 12:00 pm
Thursday 21 October 2021
Dr Sabyasachi Chattopadhyay (SAAO)
“Challenges and opportunities with fibre spectroscopy: a perspective from SAAO telescopes”
Integral field spectroscopy (IFS) has become the key mode for astronomical observations of extended and clustered sources at optical
to near-IR wavelengths. IFS offers significant advantage over traditional long-slit or multi-slit spectroscopy in terms of simultaneous 2D coverage, spectral stability, and data-gathering efficiency. I will discuss how IFS can be used to investigate bulk
motions of gas in galaxies. By combining maps of emission line diagnostics and kinematics, a new vista on baryon flows driving galaxy
evolution is opened. I will present example observations of single source, multi-source and survey class usage of IFS. This scientific argument will be complemented by a description of the IFS instrument development at SAAO: slit-mask integral field units for the visible arm of RSS on SALT. Two such units are under construction in the SAAO Fibre Optics Lab; they will complement the NIR IFS instrument I have helped develop for SALT, arriving in early 2022. Finally I will motivate future implementation of IFS to other 1-2m class telescopes at Sutherland.