Solar Atmospheric Heating, Observations and Simulations, Plasma Physics, Magnetohydrodynamics, Radiative Transfer
Background
Ph.D. in Astrophysics (Indian Institute of Astrophysics)
Thesis Title: Study of Small-Scale Features Observed in Solar Atmosphere
Awards
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SPD, AAS: Thomas Metcalf Award for Joint HINODE 11/ IRIS 8 Meeting (2017)
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CSIR, India: Senior Research Fellowship (2016-2019)
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CSIR, India: Junior Research Fellowship (2013-2015)
Publications
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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]
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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]
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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
Publications
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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