1. Tracking Galaxy Evolution Through Low-Frequency Radio Continuum Observations using SKA and Citizen-Science Research using Multi-Wavelength Data

Authors: Hota, Ananda; Konar, C.; Stalin, C. S.; Vaddi, Sravani; Mohanty, Pradeepta K.; Dabhade, Pratik; Dharmik Bhoga, Sai Arun; Rajoria, Megha; Sethi, Sagar

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Affiliation: AA(#eAstroLab, UM-DAE Centre for Excellence in Basic Sciences, Mumbai, India; [email protected] Astronomy Collaboratory, Mumbai, India), AB([email protected] Astronomy Collaboratory, Mumbai, India; Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida, India), AC(Indian Institute of Astrophysics, Bangalore, India), AD(National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune, India), AE([email protected] Astronomy Collaboratory, Mumbai, India), AF([email protected] Astronomy Collaboratory, Mumbai, India), AG([email protected] Astronomy Collaboratory, Mumbai, India), AH([email protected] Astronomy Collaboratory, Mumbai, India), AI([email protected] Astronomy Collaboratory, Mumbai, India) Publication: Journal of Astrophysics and Astronomy , Volume 37, Issue 4, article id.41, 27 pp.
Publication Date: 12/2016
Keywords: Galaxies: active, galaxies: evolution, galaxies: individual: Speca, galaxies: individual: NGC 3801, galaxies: individual: NGC 1482, galaxies: individual: NGC 6764, galaxies: jets, galaxies: stellar content, observations, amateur astronomy, crowd-sourcing, citizen-science.
Abstract Copyright: (c) 2016: Indian Academy of Sciences

ABSTRACT:
We present a review on galaxy black hole co-evolution through merger, star formation and AGN-jet feedback. We highlight results on transitional galaxies (e.g. NGC1482, NGC6764, NGC3801, Speca, RAD-18 etc.) which has data from Giant Meterwave Radio Telescope (GMRT) and other sub-mm, IR, optical, UV and X-ray telescopes. The `smoking gun' relic-evidences of past AGN-jet feedback which is believed to have quenched star formation in transitional galaxies are still missing. Relic radio lobes, as old as a few hundred Myr, can be best detected at low radio frequencies with the GMRT, LOFAR and in future SKA. However, similar relic evidences of quasar activities, known as `Hanny's Voorwerp' discovered by Galaxy Zoo in optical data, are only around a few tens of thousand years old. More discoveries are needed to match these time-scales with time since the decline of star formation in transitional galaxies. Such faint fuzzy relic emissions in optical and angular-scale sensitive radio interferometric images can be discovered most efficiently by citizen-scientists but with a formal training. We describe [email protected], the only Indian citizen-science research project in astronomy which takes such a modified approach. We present interesting objects, discovered from the TIFR GMRT Sky Survey (TGSS) by 69 trained citizen-scientists or e-astronomers, like relic radio lobes, episodic radio galaxies, jet-galaxy interaction, bent radio galaxy in filament etc.. This model can provide an equal opportunity of academic-growth to people even in the under-developed regions where we always need to establish our optical and radio telescopes. This can expand the research-activity of city-based research-institutes beyond their four brick walls, and alleviate various socio-economic and geo-political constraints on growth of citizens located in remote areas. #RADatHomeIndia #ABCDresearch

2. New results on the exotic galaxy `Speca' and discovering many more Specas with [email protected] network

Authors: Hota, Ananda; Croston, Judith H.; Ohyama, Youichi; Stalin, C. S.; Hardcastle, Martin J.; Konar, Chiranjib; Aravind, R. P.; Agarwal, Sheena M.; Dharmik Bhoga, Sai Arun; Dabhade, Pratik; Kamble, Amit A.; Mohanty, Pradeepta K.; Mukherjee, Alok; Pandey, Akansha V.; Patra, Alakananda; Pechetti, Renuka; Raut, Shrishail S.; Sushma, V.; Vaddi, Sravani; Verma, Nishchhal

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Affiliation: AA(UM-DAE Centre for Excellence in Basic Sciences (CBS), Vidyanagari, Mumbai-98, India; [email protected] Astronomy Collaboratory, India) AB(School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK) AC(Institute of Astronomy and Astrophysics, Academia Sinica, Taipei-106, Taiwan) AD(Indian Institute of Astrophysics, Bangalore 560 034, India) AE(School of Physics, Astronomy and Mathematics, University of Hertfordshire, Hatfield, UK) AF(Institute of Astronomy and Astrophysics, Academia Sinica, Taipei-106, Taiwan) AG([email protected] Astronomy Collaboratory, India) AH([email protected] Astronomy Collaboratory, India) AI([email protected] Astronomy Collaboratory, India) AJ([email protected] Astronomy Collaboratory, India) AK([email protected] Astronomy Collaboratory, India) AL([email protected] Astronomy Collaboratory, India) AM([email protected] Astronomy Collaboratory, India) AN([email protected] Astronomy Collaboratory, India) AO([email protected] Astronomy Collaboratory, India) AP([email protected] Astronomy Collaboratory, India) AQ([email protected] Astronomy Collaboratory, India) AR([email protected] Astronomy Collaboratory, India) AS([email protected] Astronomy Collaboratory, India) AT([email protected] Astronomy Collaboratory, India) Publication: ASI Conference Series, 2014, Vol. 13, pp. 141-145 Edited by J. N. Chengalur & Y. Gupta
Publication Date: 00/2014
Keywords: galaxies: active, galaxies: evolution

ABSTRACT:
We present the first report on an innovative new project named "[email protected]", a citizen-science research collaboratory built on free web-services like Facebook, Google, Skype, NASA Skyview, NED, TGSS etc.. This is the first of its kind in India, a zero-funded, zero-infrastructure, human-resource network to educate and directly involve in research, hundreds of science-educated under-graduate population of India, irrespective of their official employment and home-location with in the country. Professional international collaborators are involved in follow up observation and publication of the objects discovered by the collaboratory. We present here ten newly found candidate episodic radio galaxies, already proposed to GMRT, and ten more interesting cases which includes, bent-lobe radio galaxies located in new Mpc-scale filaments, likely tracing cosmological cluster accretion from the cosmic web. Two new Speca-like rare spiral-host large radio galaxies have also been been reported here. Early analyses from our follow up observations with the Subaru and XMM-Newton telescopes have revealed that Speca is likely a new entry to the cluster and is a fast rotating, extremely massive, star forming disk galaxy. Speca-like massive galaxies with giant radio lobes, are possibly remnants of luminous quasars in the early Universe or of first supermassive black holes with in first masssve galaxies. As discoveries of Speca-like galaxies did not require new data from big telescopes, but free archival radio-optical data, these early results demonstrate the discovery potential of [email protected] and how it can help resource-rich professionals, as well as demonstrate a model of academic-growth for resource-poor people in the underdeveloped regions via Internet.

GMRT Observation of Objects Discovered by [email protected] Astronomy Collaboratory, India

GOOD-RAC-4 GMRT Observation of Objects Discovered by [email protected] Astronomy Collaboratory, India (GOODRAC):
Faint Fuzzy TGSS-NVSS sources as tracers of fading AGNs in evolving galaxies

GOOD-RAC-3 GMRT Observation of Objects Discovered by [email protected] Astronomy Collaboratory, India (GOODRAC):
In search of radio phoenix around bent lobe radio galaxies and associated clusters

GOOD-RAC-2 GMRT Observation of Objects Discovered by [email protected] Astronomy Collaboratory, India (GOODRAC):
New Cluster-relics or revived relic-lobes

GOOD-RAC-1 GMRT Observation of Objects Discovered by [email protected] Astronomy Collaboratory, India (GOODRAC)

ASI 2018

Recent discoveries using GMRT & the growing community of #RADatHomeIndia e-astronomers leveraging Any BSc/BE Can Do research( #ABCDresearch ) approach