Abstract Details
| Name: Charitarth Vyas Affiliation: S.V.National Institute of Technology,Surat Conference ID: ASI2015_606 Title : Tracking Cosmological cluster accretion onto clusters of galaxies by semi-expert e-astronomers of RAD@home Authors and Co-Authors : Pratik Dabhade [1] , Pradeepta Mohanty [1], Sushma Vasudevan [1],Alakananda Patra [1],Shilpa Dubal [1],Megha Rajoria [1],Arpita Misra [1], Sagar Sethi [1], Ananda Hota [1,2] [1]RAD@home Astronomy Collaboratory,India(hotaananda@gmail.com) [2] UM-DAE Centre for Excellence in Basic Sciences(CBS),Vidyanagari , Mumbai 40098, India Abstract Type : Poster Abstract Category : Other Abstract : Big Data problem and citizen Science research are two important concepts that any future research plans of astronomy and astrophysics can not ignore. RAD@home, unlike Zooniverse or other such projects, is more than a citizen science on the web. It is the beginning of a large public-collaboratory or network of people with minimum undergraduate-level science and engineering education, aiming eventually to alleviate some of the socio-economic and geo-political constraints on growth of the underdeveloped regions of India. Preliminary results presented here have been achieved by a network of semi-experts or e-astronomers, as we call it, located all over India and from all walks of life. RAD@home provides them training in basic astronomy education and on how to use various astronomy database and tools (NED and image analysis tools like SAO ds9 and NASA Skyview). For the discovery and exploration of interesting/important radio sources, we have used 150 MHz TIFR GMRT Sky Survey (TGSS), which has several times higher sensitivity and resolution compared to other similar low radio frequency surveys and follow them up with GTAC proposals (GOOD-RAC project). Accretion of gas and galaxies through the filaments on to the clusters can be relatively easily traced by large (over 300 kpc) distorted radio lobes than by optical or X-rayobservations. Spotting such radio sources from scale-sensitive interferometric images is non-trivial for citizen-scientists but this growing network of e-astronomers are being trained for this job by the professionals. We present here a few preliminary results on galaxies spotted by our collaboratory using free data available on the web. It includes bent-lobe radio galaxies, lobe-distortion seen only on one of the lobes, diffuse curved radio emission etc. Most importantly, we have identified a few new Mpc-size filaments of galaxies likely associated with these bent/distorted radio sources. These findings have potential to help us understand cosmological accretion on to clusters of galaxies. Reference:http://adsabs.harvard.edu/abs/2014arXiv1402.3674H Note: This poster-paper was selected and presented in a cosmology school in ICTP, Italy. |