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Diagnosing chromospheric magnetic field through simultaneous spectropolarimetry in Hα and Ca II 854.2 nm

Published online by Cambridge University Press:  24 September 2020

K. Nagaraju Open the ORCID record for K. Nagaraju [Opens in a new window] ,
K. Sankarasubramanian  and
K. E. Rangarajan
K. Nagaraju
Affiliation:
Indian Institute of Astrophysics, Sarjapur Road, Bengaluru, India email: mailto:[email protected]; [email protected]
K. Sankarasubramanian
Affiliation:
URSC & ISRO, Vimanapura, Bengaluru, India email: [email protected]
K. E. Rangarajan
Affiliation:
Indian Institute of Astrophysics, Sarjapur Road, Bengaluru, India email: mailto:[email protected]; [email protected]
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Abstract

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Measurement of magnetic field in this layer is challenging both from point of view of observations and interpretation of the data. We present in this work about spectropolarimetric observations of a pore, simultaneously in Ca ii (CaIR) at 854.2 nm (CaIR) and H α (656.28 nm). The observed region includes a small scale energetic event (SSEE) taking place in the region between the pore and the region which show opposite polarity to that of pore at the photosphere. The energetic event appears to be a progressive reconnection event as shown by the time evolution of the intensity profiles. Closer examination of the intensity profiles from the downflow regions suggest that the height of formation of CaIR is higher than that of Hi α, contrary to the current understanding about their height of formation. Preliminary results on the inversion of Stokes-I and V profiles of CaIR are also presented.

Keywords

Photosphere: Magnetic fieldChromosphere: Magnetic fieldMulti-line-Spectropolarimetry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S354: Solar and Stellar Magnetic Fields: Origins and Manifestations , June 2019 , pp. 46 - 52
Copyright
© International Astronomical Union 2020

References

Abdussamatov, H. I. 1971, Sol. Phys, 16, 384CrossRefGoogle Scholar
Andretta, V., Jones, H. P. 1997, ApJ, 489, 375CrossRefGoogle Scholar
Balasubramaniam, K. S., Christopoulou, E. B., Uitenbroek, H. 2004, ApJ, 606, 1233CrossRefGoogle Scholar
Bjørgen, J. P., Leenaarts, J., Rempel, M., Cheung, M. C. M., Danilovic, S., de la Cruz Rodrguez, J., Sukhorukov, A. V. 2019, arXiv:1906.01098Google Scholar
Ellerman, F., 1917, ApJ, 46, 298CrossRefGoogle Scholar
Hanaoka, Y. 2005, Pub. Astro. Soc. Japan, 57, 235CrossRefGoogle Scholar
Kerr, G. S., Fletcher, L., Russell, A.e.J.B., Allred, J. C., 2016, ApJ, 827, 101CrossRefGoogle Scholar
Kuridze, D., Henriques, V. M. J., Mathioudakis, M., Rouppe van der Voort, L., de la Cruz Rodrguez, J., Carlsson, M., 2018, ApJ, 860, 10CrossRefGoogle Scholar
Lagg, A., Lites, B., Harvey, J., Gosain, S., Centeno, R., 2017, Space Science Rev., 210, 37CrossRefGoogle Scholar
Leenaarts, J., Carlsson, M., Rouppe van der Voort, L., 2012, ApJ, 749, 136CrossRefGoogle Scholar
Nagaraju, K., Sankarasubramanian, K., Rangarajan, K. E., 2008, ApJ, 678, 531CrossRefGoogle Scholar
Rutten, R. J. 2007, in Heinzel, P., Dorotovič, I., Rutten, R. J. eds, The Physics of Chromospheric Plasmas, ASP Conference Series, Volume 368, p. 27Google Scholar
Rutten, R. J. 2008, in Matthews, S. A., Davis, J. M., Harra, L. K., eds, First Results From Hinode, ASP Conference Series, Volume 397, p. 54Google Scholar
Sanchez Almeida, J., Lites, B. W., 1992, ApJ, 398, 359. DOI. ADS.CrossRefGoogle Scholar
Schlichenmaier, R., Collados, M., 2002, Astron. & Astrophys., 381, 668CrossRefGoogle Scholar
Socas-Navarro, H., Uitenbroek, H., 2004, ApJ (letters), 603, L129CrossRefGoogle Scholar
Socas-Navarro, H., Martnez Pillet, V., Elmore, D., Pietarila, A., Lites, B. W., Manso Sainz, R.m 2006, Sol. Phys., 235, 75CrossRefGoogle Scholar
Socas-Navarro, H., de la Cruz Rodrguez, J., Asensio Ramos, A., Trujillo Bueno, J., Ruiz Cobo, B., 2015, Astron. & Astrophys., 577, 7CrossRefGoogle Scholar
Vissers, G. J. M., Rouppe van der Voort, L. H. M., Rutten, R. J., Carlson, M., de Pontieu, B., 2015, ApJ, 812, 11CrossRefGoogle Scholar