Abstract Details
| Name: Sreejith Padinhatteeri |
| Affiliation: Manipal Academy of Higher Education |
| Conference ID: ASI2026_1058 |
| Title: Solar Imager for Magnetic and Doppler measurements at two heights. |
| Abstract Type: Oral |
| Abstract Category: Facilities, Technologies and Data science |
| Author(s) and Co-Author(s) with Affiliation: Sreejith Padinhatteeri(Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, India), Atul Bhat(Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, India), Harshavardhan G Hegde(SDM College, Ujire, Karnataka), Megha Anand(Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, India), Pranav Bijurkar(Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India), Nagaraju K.(Indian Institute of Astrophysics (IIA), Koramangala, Bangalore India), Sankarasubramanian K.(Space Astronomy Group, UR Rao Satellite Centre, ISRO, Bangalore), C S Suchand Sandeep(Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India), Kiran Lakshmipathaiah(Space Astronomy Group, UR Rao Satellite Centre, ISRO, Bangalore), Debbijoy Bhattacharya(Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, India), Dibyendu Nandy(Centre Of Excellence in space sciences India (CESSI), IISER Kolkata, India) |
| Abstract: Much of the dynamic activity of the Sun, including flares, coronal mass ejections and the solar wind originate from the interplay of magnetic fields and plasma. Observations of magnetic fields and plasma flows on the solar surface and the magnetic structuring of the lower solar atmosphere are therefore of crucial importance in constraining solar activity and driving models of solar magnetic field evolution. India does not have its own magnetograph dopplergram instrument which can achieve these observations. While currently functional instruments such as the HMI onboard NASA's Solar Dynamics Observatory and the US National Science Foundation's GONG network provide routine measurement, they are limited in resolution and make measurements only at the photosphere (surface level). Here we present an Indian initiative for a magnetograph dopplergram instrument which is envisaged to make routine measurements at both photospheric and chromospheric heights at higher resolution. These observations will open up possibilities for better constraining magnetic structures and their interplay with plasma flows than hitherto possible. This presentation explores the shortcomings of current instruments and delineates the scientific objectives that have shaped the requirements for the new device. It also details the simulation studies conducted to choose the two specific spectral lines for probing different atmospheric layers and summarises the preliminary optical design. |