Scientist Profile

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Research Areas
  • Galactic Interstellar Medium
  • Molecular Cloud Formation
  • Starformation
  • Radio Astronomy Instrumentation

Anish Roshi

Dr. Anish Roshi graduated with an engineering degree in electronics and communications from the University of Kerala. In 1989, he joined the Tata Institute of Fundamental Research (TIFR), National Center for Radio Astrophysics, Pune as a Research Associate/Scientific Oficer. At TIFR, he completed his Ph.D (Physics) specializing in Radio Astronomy (1999) and was appointed as a member of the faculty.

He was a Jansky postdoctoral fellow at the National Radio Astronomy Observatory (NRAO), USA between 2000 and 2002. On completion of the post doctoral fellowship, Dr Roshi joined the Raman Research Institute (RRI), Bangalore. While at RRI his biggest contribution was in leading a team of engineers in successfully designing and building a digital receiver for the Murchison Widefield Array, located at Western Australia.

In 2010, Dr. Roshi moved to the National Radio Astronomy Observatory (NRAO), USA. At NRAO, he was the System Architect and Project Scientist for the Versatile Astronomical Spectrometer that was built for the Green Bank Telescope (GBT). He was also the System Architect for the Phased Array Feed (PAF) project. PAFs are specialized feed to increase the field of view of radio telescope. At Arecibo Observatory, he is working with the team building the 40 beam PAF for the telescope.

Since 2018, he is a Senior Observatory Scientist for Radio Astronomy at the Arecibo Observatory. Dr. Roshi has an active research interest in Astronomy. His primary focus has been the study of galactic Interstellar Medium (ISM), molecular cloud formation and massive star formation using radio recombination lines (RRLs). At Arecibo Observatory, he continues such studies using the sensitive telescope.

Dr. Anish Roshi research focuses on the study of molecular cloud formation using low–frequency carbon recombination lines and radio frequency interference mitigation. He also studies Phased Array Feed theory, system design and signal processing.

Dr. Anish Roshi projects include the study of molecular cloud formation using low–frequency carbon recombination lines, radio frequency interference excision technique to detect weak astronomical spectral lines, and applying focal field interferometry with the Arecibo telescope.

Adithya Sineesh, (Undergrad, National Institute of Technology, India) – Supervisor (2020 –)

Akul Santhosh, (Undergrad, Cochin University of Science & Technology, India) – Supervisor (2020–)

Mishall Jan, (Undergrad, University of Colorado, Boulder) – Supervisor (2019–2020)

Viviana Rosero, (Undergrad, New Mexico Tech, New Mexico) – Supervisor (2011–2012)

Adele Plunkett (Undergrad, Yale University, Yale) – Supervisor (2011–2012)

Sravani Vaddi, (REU, University of Rochester, New York) –Supervisor (2011–2012)

Jeeva Priya, (Graduate, Mysore University, India) – Supervisor (2004–2006)

Raju Baddi, (Ph.D, Raman Research Institute, India) – Supervisor (2006–2011)

Peer-reviewed publications


Model for a Noise–Matched Phased Array Feed, D. A. Roshi, W. Shillue, J. R. Fisher. 2019, IEEE Tran on Antenna & Propagation, 67, 3011


Performance of a highly sensitive, 19–element, dual–polarization, cryogenic L–band Phased Array Feed on the Green Bank Telescope, D. A. Roshi, W. Shillue, et al. 2018, AJ,155,202–3881/aab965


Helium Ionization in the Diffuse Ionized Gas surrounding UCHII regions, D. A. Roshi, E. Churchwell & L. D. Anderson, 2017, ApJ, 838, 144–4357/aa662b


Magnetic Fields at the Periphery of Ultracompact H II Regions

Non Peer-reviewed publications


Radio Recombination Line Observations Toward the Massive Star Forming Region W51 IRS1, M. I. Jan, D. A. Roshi, et al., 2019, To appear in ASPCS Vol. 525, "2020 Compendium of Undergraduate Research in Astronomy and Space Science', Joseph B. Jensen, Jonathan Barnes, and Beth Wardell, eds. (2020)


Arecibo Observatory in the Next Decade, Roshi, et al. 2019BAAS...51g.244R


High Frequency Carbon Recombination Lines as a Probe to Study the Environment of Ultra–Compact HII Regions, Roshi, D. A., 2005BASI...33..346R