caa a22 4500 44534573X CHVBK 20180317142828.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11207-010-9625-1 doi (NATIONALLICENCE)springer-10.1007/s11207-010-9625-1 Acoustic Power Absorption and its Relation toVector Magnetic Field of a Sunspot [Elektronische Daten] [S. Gosain, S. Mathew, P. Venkatakrishnan] The distribution of acoustic power over sunspots shows an enhanced absorption near the umbra - penumbra boundary. Previous studies revealed that the region of enhanced absorption coincides with the region of strongest transverse potential field. The aim of this paper is to i) utilize the high-resolution vector magnetograms derived using Hinode SOT/SP observations and study the relationship between the vector magnetic field and power absorption and ii) study the variation of power absorption in sunspot penumbrae due to the presence of spine-like radial structures. It is found that i) both potential and observed transverse fields peak at a similar radial distance from the center of the sunspot, and ii) the magnitude of the transverse field, derived from Hinode observations, is much larger than the potential transverse field derived from SOHO/MDI longitudinal-field observations. In the penumbra, the radial structures called spines (intra-spines) have stronger (weaker) field strength and are more vertical (horizontal). The absorption of acoustic power in the spine and intra-spine shows different behavior, with the absorption being larger in the spine as compared to the intra-spine. Springer Science+Business Media B.V., 2010 Acoustic waves nationallicence Field inclination nationallicence Magnetic field nationallicence p -mode absorption nationallicence Sunspots nationallicence Gosain S. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut Mathew S. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut Venkatakrishnan P. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut Solar Physics Springer Netherlands 268/2(2011-02-01), 335-348 0038-0938 268:2<335 2011 268 11207 https://doi.org/10.1007/s11207-010-9625-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9625-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gosain S. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut NATIONALLICENCE 700 1- Mathew S. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut NATIONALLICENCE 700 1- Venkatakrishnan P. Udaipur Solar Observatory, Post Box 198, 313001, Dewali, Udaipur, India aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 268/2(2011-02-01), 335-348 0038-0938 268:2<335 2011 268 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer