Nancy Narang

Postdoctoral Fellow - Rosseland Centre for Solar Physics

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Email nancy.narang@astro.uio.no

Room 210

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Visiting address Institutt for Teoretisk Astrofysikk Sem Sælands vei 13 Svein Rosselands hus 0371 OSLO

Postal address Postboks 1029 0315 Oslo

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https://orcid.org/0000-0001-9398-2063

Solar Atmospheric Heating, Observations and Simulations, Plasma Physics, Magnetohydrodynamics, Radiative Transfer

Ph.D. in Astrophysics (Indian Institute of Astrophysics)

Thesis Title: Study of Small-Scale Features Observed in Solar Atmosphere

High-frequency dynamics of an active region moss as observed by IRIS

N. Narang, V. Pant, D. Banerjee, T. V. Doorsselaere, 2019, Frontiers in Astronomy and Space Sciences, 6:36 [https://dx.doi.org/10.3389/fspas.2019.00036]
Association of calcium network bright-points with underneath photospheric magnetic patches

N. Narang, D. Banerjee, K. Chandrashekhar, V. Pant, 2019, Solar Physics, 294:40 [https://dx.doi.org/10.1007/s11207-019-1419-5]
Statistical study of network jets observed in the solar transition region: A comparison between coronal holes and quiet sun regions

N. Narang , R. T. Arbacher, H. Tian, D. Banerjee, S. R. Cranmer, E. E. DeLuca, S. McKillop, 2016, Solar Physics, 291: 129 [ https://dx.doi.org/10.1007/s11207-016- 0886-1 ]

Tags: Astronomy and Astrophysics, Solar Physics, Observations, Simulations, Solar Chromosphere, Solar Corona, Swedish Solar Telescope (SST), ALMA, IRIS, Hinode, Solar Dynamics Observatory

Narang, Nancy (2021). Power distribution of oscillations in plage region: Joint observations from ALMA, IRIS and AIA.
Narang, Nancy (2021). Power distribution of oscillations in plage region: Joint observations from ALMA, IRIS and AIA.
Narang, Nancy (2020). What causes high-frequency oscillations in active region moss: Waves or/and Reconnection? Show summary
The high temporal, spatial and spectral resolution of Interface Region Imaging Spectrograph (IRIS) has provided new insights into the understanding of different small-scale processes occurring at the chromospheric and transition region heights. I will present a study of the dynamics of high-frequency oscillations of an active region (AR 2376) moss as recorded by simultaneous imaging and spectral data of IRIS. Wavelet transformations and power maps from slit-jaw images in Si IV 1400 Å passband, and sit-and-stare spectroscopic observations of Si IV 1403 Å spectral line reveal the presence of high-frequency oscillations with ~1-2 minutes periods in the bright moss regions. The presence of such low periodicities is further confirmed by intrinsic mode functions (IMFs) as obtained by empirical mode decomposition (EMD) technique. I will show the evidence of the presence of slow waves and reconnection-like events, and that together they cause the high-frequency oscillations in the bright moss regions.

Published Jan. 6, 2020 3:18 PM - Last modified July 2, 2020 2:46 PM