HARIS UMMATH
@unitywomenscollege.in
Assistant Professor
KAHM Unity Women's College, Manjeri
Haris is an Assistant Professor and PhD scholar specializing in image processing and deep learning techniques. Haris has contributed significantly to academic workshops and courses, including coordinating IoT certification courses and facilitating large-scale student participation in NPTEL courses as a SPOC for the NPTEL chapter. He is also actively involved in community service by serving as an NSS Programme Officer for his college.
RESEARCH, TEACHING, or OTHER INTERESTS
Computer Science, Artificial Intelligence, Computer Vision and Pattern Recognition, Computer Graphics and Computer-Aided Design
Scopus Publications
Scopus Publications
Haris U, Kabeer V, and Afsal K
Springer Science and Business Media LLC
U. Haris, V. S. Parvathi, S. B. Gudennavar, S. G. Bubbly, J. Murthy, and U. J. Sofia
American Astronomical Society
ABSTRACT We report interstellar silicon (Si) depletion and dust-phase column densities of Si along 131 Galactic sight lines using archival observations. The data were corrected for differences in the assumed oscillator strength. This is a much larger sample than previous studies but confirms the majority of results, which state that the depletion of Si is correlated with the average density of hydrogen along the line of sight ( 〈 n ( H ) 〉 ) as well as the fraction of hydrogen in molecular form (f(H2)). We also find that the linear part of the extinction curve is independent of Si depletion. Si depletion is correlated with the bump strength (c 3/R V ) and the FUV curvature (c 4/R V ) suggesting that silicon plays a significant role in both the 2175 Å bump and the FUV rise.
U. Haris, V. S. Parvathi, S. B. Gudennavar, and J. Murthy
AIP
We report interstellar Si depletion and dust-phase column densities of Si along 131 Galactic sight lines using previously reported gas-phase Si II column densities, after correcting for the differences in oscillator strengths. With our large sample, we could reproduce the previously reported correlations between depletion of Si and average density of hydrogen along the line of sight ( ) as well as molecular fraction of hydrogen (f(H2). We have also studied the variation of amount of Si incorporated in dust with respect to different extinction parameters. With the limitations we have with the quality of data, we could find a strong relation between the Si dust and extinction. While we cannot predict the density dependent distribution of size of Si grains, we discuss about the large depletion fraction of Si and the bigger size of the silicate grains.
RECENT SCHOLAR PUBLICATIONS
Publications
10.1007/s11042-023-18025-7