<div dir="ltr"><div><div><div class="gmail_signature"><div dir="ltr">Dear Colleagues,<br><br>We have just published a new paper using EIS/Hinode data titled 'Spectroscopic Observations of a Coronal Loop: Basic Physical Plasma Parameters Along the Full Loop Length', Gupta, G. R.; Tripathi, Durgesh; Mason, Helen, 2015, ApJ, <b>800</b> 140 (arXiv:1412.7428)<br><br>Article can be found here: <a href="http://iopscience.iop.org/0004-637X/800/2/140/article">http://iopscience.iop.org/0004-637X/800/2/140/article</a><br><br></div><div dir="ltr">Abstract: Coronal loops are the basic structures of the solar transition region
and corona. Understanding of the physical mechanisms behind the loop
heating, plasma flows, and filling are still considered a major
challenge in solar physics. The mechanism(s) should be able to supply
mass to the corona from the chromosphere and to heat the plasma over 1
MK within a small distance of a few hundred kilometers from the
chromosphere to the corona. This problem makes coronal loops an
interesting target for detailed study. In this study, we focus on
spectroscopic observations of a coronal loop observed in its full length
in various spectral lines as recorded by the Extreme-ultraviolet
Imaging Spectrometer on board Hinode. We derive physical plasma
parameters such as electron density, temperature, pressure, column
depth, and filling factors along the loop length from one footpoint to
the another. The obtained parameters are used to infer whether the
observed coronal loop is overdense or underdense with respect to
gravitational stratification of the solar atmosphere. These new
measurements of physical plasma parameters, from one footpoint to
another, provide important constraints on the modeling of the mass and
energy balance in coronal loops.<br><br><br>With Regards,<br>Girjesh R. Gupta<br><br>-----------------------------------------------------------------------------------------<br><font><b>Girjesh R. Gupta</b></font><br><font><span style="font-family:arial,helvetica,sans-serif">DST-INSPIRE Faculty Fellow<br></span></font><div dir="ltr" style="font-family:serif"><font><span style="font-family:arial,helvetica,sans-serif">Inter-University Centre for Astronomy & Astrophysics (IUCAA)</span></font></div><div dir="ltr" style="font-family:serif"><font><span style="font-family:arial,helvetica,sans-serif">Ganeshkhind, Pune University Campus</span></font></div><div dir="ltr" style="font-family:serif"><font><span style="font-family:arial,helvetica,sans-serif">Pune 411007<font> </font>India</span></font></div><br>
<b>Tel.</b> : +91 20 2560 4208<br>
<b>Fax </b>: +91 20 2560 4699<br><b>homepage: </b><a href="http://www.iucaa.ernet.in/~girjesh" target="_blank">http://www.iucaa.ernet.in/~girjesh</a><br>-----------------------------------------------------------------------------------------<br></div></div></div>
</div></div>