Zobrazeno 1 - 10
of 213
pro vyhledávání: '"Das, H K"'
Autor:
Ramaprakash, A. N., Rajarshi, C. V., Das, H. K., Khodade, P., Modi, D., Panopoulou, G., Maharana, S., Blinov, D., Angelakis, E., Casadio, C., Fuhrmann, L., Hovatta, T., Kiehlmann, S., King, O. G., Kylafis, N., Kougentakis, A., Kus, A., Mahabal, A., Marecki, A., Myserlis, I., Paterakis, G., Paleologou, E., Liodakis, I., Papadakis, I., Papamastorakis, I., Pavlidou, V., Pazderski, E., Pearson, T. J., Readhead, A. C. S., Reig, P., Slowikowska, A., Tassis, K., Zensus, J. A.
We present the design and performance of RoboPol, a four-channel optical polarimeter operating at the Skinakas Observatory in Crete, Greece. RoboPol is capable of measuring both relative linear Stokes parameters $q$ and $u$ (and the total intensity $
Externí odkaz:
http://arxiv.org/abs/1902.08367
We interpret the relation between the polarizing efficiency $P_{\max}/E(B-V)$ and the wavelength of the maximum polarization $\lambda_{\max}$ observed for 17 objects (including 243 stars) separated into two groups: "dark clouds" and "open clusters".
Externí odkaz:
http://arxiv.org/abs/1509.06000
Autor:
Panopoulou, G. V., Tassis, K., Blinov, D., Pavlidou, V., King, O. G., Paleologou, E., Ramaprakash, A., Angelakis, E., Balokovic, M., Das, H. K., Feiler, R., Hovatta, T., Khodade, P., Kiehlmann, S., Kus, A., Kylafis, N., Liodakis, I., Mahabal, A., Modi, D., Myserlis, I., Papadakis, I., Papamastorakis, I., Pazderska, B., Pazderski, E., Pearson, T. J., Rajarshi, C., Readhead, A. C. S., Reig, P., Zensus, J. A.
Publikováno v:
Mon. Not. R. Astron. Soc., 452 (2015), 715-726
The stages before the formation of stars in molecular clouds are poorly understood. Insights can be gained by studying the properties of quiescent clouds, such as their magnetic field structure. The plane-of-the-sky orientation of the field can be tr
Externí odkaz:
http://arxiv.org/abs/1503.03054
Autor:
Riddle, Reed L., Tokovinin, Andrei, Mason, Brian D., Hartkopf, William I., Roberts, Jr., Lewis C., Baranec, Christoph, Law, Nicholas M., Bui, Khanh, Burse, Mahesh P., Das, H. K., Dekany, Richard G., Kulkarni, Shrinivas, Punnadi, Sujit, Ramaprakash, A. N., Tendulkar, Shriharsh P.
Publikováno v:
2015, ApJ, 799, 4
We conducted a survey of nearby binary systems composed of main sequence stars of spectral types F and G in order to improve our understanding of the hierarchical nature of multiple star systems. Using Robo-AO, the first robotic adaptive optics instr
Externí odkaz:
http://arxiv.org/abs/1411.0682
Autor:
Law, Nicholas M., Morton, Tim, Baranec, Christoph, Riddle, Reed, Ravichandran, Ganesh, Ziegler, Carl, Johnson, John Asher, Tendulkar, Shriharsh P., Bui, Khanh, Burse, Mahesh P., Das, H. K., Dekany, Richard G., Kulkarni, Shrinivas, Punnadi, Sujit, Ramaprakash, A. N.
The Robo-AO Kepler Planetary Candidate Survey is designed to observe every Kepler planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or responsible for t
Externí odkaz:
http://arxiv.org/abs/1312.4958
A quantitative interpretation of the observed relation between the interstellar linear polarization curve parameters $K$ and $\lambda_{\max}$ characterizing the width and the wavelength of a polarization maximum, respectively, is given. The observati
Externí odkaz:
http://arxiv.org/abs/1303.1033
Autor:
Terziev, Emil, Law, Nicholas M., Arcavi, Iair, Baranec, Christoph, Bloom, Joshua S., Bui, Khanh, Burse, Mahesh P., Chorida, Pravin, Das, H. K., Dekany, Richard G., Kraus, Adam L., Kulkarni, S. R., Nugent, Peter, Ofek, Eran O., Punnadi, Sujit, Ramaprakash, A. N., Riddle, Reed, Tendulkar, Shriharsh P.
The direct detection of binary systems in wide-field surveys is limited by the size of the stars' point-spread-functions (PSFs). A search for elongated objects can find closer companions, but is limited by the precision to which the PSF shape can be
Externí odkaz:
http://arxiv.org/abs/1210.4550
We compiled the polarimetric data for a sample of lines of sight with known abundances of Mg, Si, and Fe. We correlated the degree of interstellar polarization $P$ and polarization efficiency (the ratio of $P$ to the colour excess $E(B-V)$ or extinct
Externí odkaz:
http://arxiv.org/abs/1203.3677
Autor:
Law, Nicholas M., Kraus, Adam L., Street, Rachel, Fulton, Benjamin J., Hillenbrand, Lynne A., Shporer, Avi, Lister, Tim, Baranec, Christoph, Bloom, Joshua S., Bui, Khanh, Burse, Mahesh P., Cenko, S. Bradley, Das, H. K., Davis, Jack. T. C., Dekany, Richard G., Filippenko, Alexei V., Kasliwal, Mansi M., Kulkarni, S. R., Nugent, Peter, Ofek, Eran O., Poznanski, Dovi, Quimby, Robert M., Ramaprakash, A. N., Riddle, Reed, Silverman, Jeffrey M., Sivanandam, Suresh, Tendulkar, Shriharsh
We present three new eclipsing white-dwarf / M-dwarf binary systems discovered during a search for transiting planets around M-dwarfs. Unlike most known eclipsing systems of this type, the optical and infrared emission is dominated by the M-dwarf com
Externí odkaz:
http://arxiv.org/abs/1112.1701
We extend and investigate the spheroidal model of interstellar dust grains used to simultaneously interpret the observed interstellar extinction and polarization curves. We compare our model with similar models recently suggested by other authors, st
Externí odkaz:
http://arxiv.org/abs/1001.0655