Draft:Poonam Chandra

• Comment: The subjects own work can't verify potentially contentious claims. E.g., a claim like "Her work has subsequently extended the study of ECME to a larger sample of magnetic hot stars Their work led to the identification of a class of objects termed "Main-sequence Radio Pulse emitters" (MRPs), characterized by periodic, highly polarized radio emission associated with their strong magnetic fields." needs to be supported by a third party source stating so. Sulfurboy (talk) 20:03, 5 October 2026 (UTC)

• Comment: In preparing this draft, I disclose that AI assistance was used as follows: I took help in how to define references to put in wikipedia page and how to name a reference if I am using multiple times in a page. Hat-is-On (talk) 18:44, 5 October 2026 (UTC)

• Comment: In accordance with Wikipedia's Conflict of interest guideline, I disclose that I have a conflict of interest regarding the subject of this article. Hat-is-On (talk) 18:40, 5 October 2026 (UTC)

• Comment: In accordance with Wikipedia's Conflict of interest guideline, I disclose that I have a conflict of interest regarding the subject of this article. Hat-is-On (talk) 18:40, 5 October 2026 (UTC)

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Poonam Chandra
Education	Indian Institute of Science,Tata Institute of Fundamental Research, Aligarh Muslim University, Dayalbagh Educational Institute
Known for	Radio studies of magnetic massive stars, supernovae and gamma-ray bursts
Awards	International Union of Pure and Applied Physics Young Astrophysicist award, Indian National Science Academy Young Scientist award, Swarnajayanti Fellowship, Fellow of the Indian Academy of Sciences, Fellow of the Indian National Science Academy, Fellow of the National Academy of Sciences, India
Scientific career
Fields	Astrophysics, Radio and X-ray astronomy
Workplaces	National Radio Astronomy Observatory, National Centre for Radio Astrophysics

Poonam Chandra is an Indian astrophysicist and astronomer at the National Radio Astronomy Observatory (NRAO) in Charlottesville, Virginia.. Her research primarily focuses on astrophysics, including the study of cosmic explosions, supernovae, gamma-ray bursts (GRBs), and the radio counterparts of gravitational waves.

Chandra is an elected fellow of all three of India's major national science academies: the Indian Academy of Sciences (IAS), the Indian National Science Academy (INSA), and the National Academy of Sciences, India (NASI).

Early life and education

Chandra completed her Bachelor of Science at the Dayalbagh Educational Institute and earned her Master of Science in Physics from Aligarh Muslim University . She pursued doctoral research in astrophysics at the Indian Institute of Science (IISc) in Bengaluru and carried out her research at Tata Institute of Fundamental Research (TIFR) in Mumbai, obtaining her PhD in 2005 on studies of cosmic explosions.

Career and research

Following her PhD, Chandra was awarded a Jansky Postdoctoral Fellowship at the National Radio Astronomy Observatory from 2005 to 2008. She later served as an Associate Professor at the National Centre for Radio Astrophysics (NCRA-TIFR) in Pune, India, before returning to the NRAO as a tenured astronomer. . She also holds a visiting faculty position at the University of Virginia.

Chandra's research is centered on radio observations of transient and energetic astrophysical phenomena, with emphasis on core-collapse supernovae, gamma-ray bursts, magnetic massive stars. A recurring theme of her work is to use radio emission to probe physical conditions that are difficult to study in other wavelengths, such as circumstellar environments, relativistic outflows and stellar magnetospheres. Chandra has carried out studies of supernovae in dense environments to investigate the interaction of expanding ejecta with material lost by the progenitor star before the explosion. Her radio studies have also examined unusual and energetic stellar explosions. Observations of the fast blue optical transient AT 2018cow with the upgraded Giant Metrewave Radio Telescope covered frequencies from 250 to 1450 MHz over more than 500 days. The observations indicated synchrotron emission from an inhomogeneous expanding region and provided constraints on the velocity of the ejecta and the mass-loss history of the progenitor system.. Chandra has studied the radio afterglows of gamma-ray bursts. She led the team discovering the highest redshift radio afterglow from GRB 090423, a gamma-ray burst at a redshift of 8.3.

Chandra, along with Dale Frail of NRAO also conducted statistical study of almost 3000 radio measurements of about 300 gamma-ray bursts observed between 1997 and 2011. They found radio detection in 1/3rd of the bursts and characterized evolution and environments of these bursts.

Another major area of Chandra's research concerns the radio magnetospheres of magnetic massive stars. In collaboration with other researchers, she has used the Giant Metrewave Radio Telescope to study coherent electron cyclotron maser emission (ECME), a highly polarized form of non-thermal radio emission produced in stellar magnetospheres. Observations of magnetic B-type stars have been used to investigate the structure and plasma conditions of their magnetospheres. Her work has subsequently extended the study of ECME to a larger sample of magnetic hot stars Their work led to the identification of a class of objects termed "Main-sequence Radio Pulse emitters" (MRPs), characterized by periodic, highly polarized radio emission associated with their strong magnetic fields. More recent observations of the magnetic B star HD 142990 with MeerKAT have revealed fine structures and secondary enhancements in its coherent radio emission, providing further information about the distribution of plasma in highly oblique stellar magnetospheres.

Chandra has also participated in radio observations of electromagnetic counterparts to gravitational-wave events. In studies of the binary neutron-star merger GW170817, low-frequency radio observations with the Giant Metrewave Radio Telescope contributed to investigations of the interaction between the merger outflow and the surrounding medium and the nature of the associated relativistic outflow.

A common feature of Chandra's research is the use of radio observations to investigate phenomena associated with massive stars and stellar-mass explosions. Her work spans stellar magnetospheres, pre-supernova mass loss, shock acceleration, relativistic outflows and the environments of transient explosions, linking observations at radio wavelengths with X-ray, optical and infrared measurements. Chandra has co-authored more than 100 refereed publications.

Public engagement/Books

Chandra has contributed the autobiographical chapter "A Train to the Stars" in the book The Sky Is for Everyone: Women Astronomers in Their Own Words, edited by Virginia Trimble and David A. Weintraub and published by Princeton University Press in 2022. The chapter describes her path into astronomy and her experiences as a researcher. She has also discussed her scientific career and experiences as an astronomer in media interviews, including an appearance on the BBC World Service programme Outlook in 2023 about her career in astronomy and her autobiographical chapter in The Sky Is for Everyone. The interview discussed her childhood in northern India, her pursuit of higher education and her subsequent career as an astrophysicist.