Zobrazeno 1 - 10
of 302
pro vyhledávání: '"Sivarani, T."'
Autor:
Shah, Sarang, Subramanian, Smitha, K., Avinash C., Andersen, David R., Skidmore, Warren, Anupama, G. C., Delgado, Francisco, Gillies, Kim, Gopinathan, Maheshwar, Ramaprakash, A. N., Reddy, B. E., Sivarani, T., Subramaniam, Annapurni
Publikováno v:
The Astronomical Journal, 168:59 (28pp), 2024 August
At first light, the Thirty Meter Telescope (TMT) near-infrared (NIR) instruments will be fed by a multiconjugate adaptive optics instrument known as the Narrow Field Infrared Adaptive Optics System (NFIRAOS). NFIRAOS will use six laser guide stars to
Externí odkaz:
http://arxiv.org/abs/2408.08180
Autor:
Bestha, Manjunath, Sivarani, T., Surya, Arun, Yadav, Sudharsan, Unni, Athira, M, Parvathy, Divakar, Devika, Sriram, S., Prakash, Ajin, Hasan, Amirul
We present a conceptual design for a fiber positioning system for multi-object high-resolution spectroscopy, designed to be compatible with the upcoming large telescopes with a wide field of view. The design incorporates multiple Atmospheric Dispersi
Externí odkaz:
http://arxiv.org/abs/2407.15394
There is growing evidence from stellar kinematics and galactic chemical evolution (GCE) suggesting that giant planets (M$_{P}\geq$0.3$M_{J}$) are relatively young compared to the most commonly occurring population of small planets (M$_{P} <$0.3$M_{J}
Externí odkaz:
http://arxiv.org/abs/2404.13398
Autor:
Bestha, Manjunath, Hasan, Amirul, Divakar, Devika, Surya, Arun, Sriram, S., Sivarani, T., Prakash, Ajin, M, Parvathy, Yadav, Sudharsan
Publikováno v:
Proc. SPIE 12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, 126770Q (4 October 2023)
Highly multiplexed spectroscopic surveys have changed the astronomy landscape in recent years. However, these surveys are limited to low and medium spectral resolution. High spectral resolution spectroscopy is often photon starved and will benefit fr
Externí odkaz:
http://arxiv.org/abs/2310.15685
Autor:
Swastik, C., Banyal, Ravinder K., Narang, Mayank, Unni, Athira, Banerjee, Bihan, Manoj, P., Sivarani, T.
The GAIA space mission is impacting astronomy in many significant ways by providing a uniform, homogeneous and precise data set for over 1 billion stars and other celestial objects in the Milky Way and beyond. Exoplanet science has greatly benefited
Externí odkaz:
http://arxiv.org/abs/2307.11442
Autor:
Banyal, Ravinder K., Hasan, Amirul, Kupke, Reni, Varshney, Hari Mohan, Prakash, Ajin, Sivarani, T., Skemer, Andy J., MacDonald, Nick, Sallum, Steph, Deich, Will, Fitzgerald, Michael P., Govinda, K. V., Ratliff, Chris, Sethuram, Ramya, Stelter, Deno, Surya, Arun, Wang, Eric
A next-generation instrument named, Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES), is being planned for the W. M. Keck Observatory. SCALES will have an integral field spectrograph (IFS) and a diffraction-limited imaging c
Externí odkaz:
http://arxiv.org/abs/2208.07523
Autor:
Swastik, C., Banyal, Ravinder K., Narang, Mayank, Manoj, P., Sivarani, T., Rajaguru, S. P., Unni, Athira, Banerjee, Bihan
Publikováno v:
The Astronomical Journal, 164:60 (16pp), 2022 August
The imprints of stellar nucleosynthesis and chemical evolution of the galaxy can be seen in different stellar populations, with older generation stars showing higher $\alpha$-element abundances while the later generations becoming enriched with iron-
Externí odkaz:
http://arxiv.org/abs/2205.15793
Autor:
Schatz, H., Reyes, A. D. Becerril, Best, A., Brown, E. F., Chatziioannou, K., Chipps, K. A., Deibel, C. M., Ezzeddine, R., Galloway, D. K., Hansen, C. J., Herwig, F., Ji, A. P., Lugaro, M., Meisel, Z., Norman, D., Read, J. S., Roberts, L. F., Spyrou, A., Tews, I., Timmes, F. X., Travaglio, C., Vassh, N., Abia, C., Adsley, P., Agarwal, S., Aliotta, M., Aoki, W., Arcones, A., Aryan, A., Bandyopadhyay, A., Banu, A., Bardayan, D. W., Barnes, J., Bauswein, A., Beers, T. C., Bishop, J., Boztepe, T., Côté, B., Caplan, M. E., Champagne, A. E., Clark, J. A., Couder, M., Couture, A., de Mink, S. E., Debnath, S., deBoer, R. J., Hartogh, J. den, Denissenkov, P., Dexheimer, V., Dillmann, I., Escher, J. E., Famiano, M. A., Farmer, R., Fisher, R., Fröhlich, C., Frebel, A., Fryer, C., Fuller, G., Ganguly, A. K., Ghosh, S., Gibson, B. K., Gorda, T., Gourgouliatos, K. N., Graber, V., Gupta, M., Haxton, W., Heger, A., Hix, W. R., Ho, W C. G., Holmbeck, E. M., Hood, A. A., Huth, S., Imbriani, G., Izzard, R. G., Jain, R., Jayatissa, H., Johnston, Z., Kajino, T., Kankainen, A., Kiss, G. G., Kwiatkowski, A., La Cognata, M., Laird, A. M., Lamia, L., Landry, P., Laplace, E., Launey, K. D., Leahy, D., Leckenby, G., Lennarz, A., Longfellow, B., Lovell, A. E., Lynch, W. G., Lyons, S. M., Maeda, K., Masha, E., Matei, C., Merc, J., Messer, B., Montes, F., Mukherjee, A., Mumpower, M., Neto, D., Nevins, B., Newton, W. G., Nguyen, L. Q., Nishikawa, K., Nishimura, N., Nunes, F. M., O'Connor, E., O'Shea, B. W., Ong, W-J., Pain, S. D., Pajkos, M. A., Pignatari, M., Pizzone, R. G., Placco, V. M., Plewa, T., Pritychenko, B., Psaltis, A., Puentes, D., Qian, Y-Z., Radice, D., Rapagnani, D., Rebeiro, B. M., Reifarth, R., Richard, A. L., Rijal, N., Roederer, I. U., Rojo, J. S., K, J. S, Saito, Y., Schwenk, A., Sergi, M. L., Sidhu, R. S., Simon, A., Sivarani, T., Skúladóttir, Á., Smith, M. S., Spiridon, A., Sprouse, T. M., Starrfield, S., Steiner, A. W., Strieder, F., Sultana, I., Surman, R., Szücs, T., Tawfik, A., Thielemann, F., Trache, L., Trappitsch, R., Tsang, M. B., Tumino, A., Upadhyayula, S., Martínez, J. O. Valle, Van der Swaelmen, M., Vázquez, C. Viscasillas, Watts, A., Wehmeyer, B., Wiescher, M., Wrede, C., Yoon, J., Zegers, R G. T., Zermane, M. A., Zingale, M.
Nuclear Astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of
Externí odkaz:
http://arxiv.org/abs/2205.07996
Autor:
Pinto, A. Matas, Spite, M., Caffau, E., Bonifacio, P., Sbordone, L., Sivarani, T., Steffen, M., Spite, F., Francois, P., Di Matteo, P.
Publikováno v:
Astronomy and Astrophysics - A&A, EDP Sciences
Context. The study of old, metal-poor stars deepens our knowledge on the early stages of the universe. In particular, the study of these stars gives us a valuable insight into the masses of the first massive stars and their emission of ionising photo
Externí odkaz:
http://arxiv.org/abs/2110.00243
Autor:
Susmitha, A., Ojha, D. K., Sivarani, T., Ninan, J. P., Bandyopadhyay, A., Surya, Arun, Unni, Athira
We present the abundance analyses of 7 Carbon enhanced metal-poor (CEMP) stars to understand the origin of carbon in them. We used high-resolution optical spectra to derive abundances of various elements. We also used low-resolution Near-Infrared (NI
Externí odkaz:
http://arxiv.org/abs/2105.08083