Study of chemically peculiar stars – I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44

Autor: Santosh Joshi, Otto Trust, E Semenko, P E Williams, P Lampens, P De Cat, L Vermeylen, D L Holdsworth, R A García, S Mathur, A R G Santos, D Mkrtichian, A Goswami, M Cuntz, A P Yadav, M Sarkar, B C Bhatt, F Kahraman Aliçavuş, M D Nhlapo, M N Lund, P P Goswami, I Savanov, A Jorissen, E Jurua, E Avvakumova, E S Dmitrienko, N K Chakradhari, M K Das, S Chowdhury, O P Abedigamba, I Yakunin, B Letarte, D Karinkuzhi

Publikováno v: Joshi, S, Trust, O, Semenko, E, Williams, P E, Lampens, P, De Cat, P, Vermeylen, L, Holdsworth, D L, García, R A, Mathur, S, Santos, A R G, Mkrtichian, D, Goswami, A, Cuntz, M, Yadav, A P, Sarkar, M, Bhatt, B C, Aliçavuş, F K, Nhlapo, M D, Lund, M N, Goswami, P P, Savanov, I, Jorissen, A, Jurua, E, Avvakumova, E, Dmitrienko, E S, Chakradhari, N K, Das, M K, Chowdhury, S, Abedigamba, O P, Yakunin, I, Letarte, B & Karinkuzhi, D 2022, ' Study of chemically peculiar stars-I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44 ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 4, pp. 5854-5871 . https://doi.org/10.1093/mnras/stab3158

We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals that the light variations in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a63b2acecc3014793c27f0cec418eb00

An experiment to evaluate the thermal performance of an oil-heating copper spiral coil

Autor: A Mawire, O P Abedigamba

Publikováno v: European Journal of Physics. 34:547-557

An experimental setup to evaluate the thermal performance of an oil-heating copper spiral coil heat exchanger is presented. The thermal performance is evaluated in terms of energy and exergy analyses. Results obtained while increasing the flow-rate o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77447f041fe280c8a1dd7c979d45b9db
https://doi.org/10.1088/0143-0807/34/3/547

Differential rotation in K, G, F and A stars

Autor: L. A. Balona, O. P. Abedigamba

Rotational light modulation in Kepler photometry of K - A stars is used to estimate the absolute rotational shear. The rotation frequency spread in 2562 carefully selected stars with known rotation periods is measured using time-frequency diagrams. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccfb0c5d593891eb40c9a24c37f4276a

Red Clump stars in Kepler open cluster NGC 6819

Autor: T.R. Medupe, O. P. Abedigamba, L.A. Balona

Publikováno v: EPJ Web of Conferences, Vol 101, p 06001 (2015)

We measure the large frequency separation, Δν , and the frequency of maximum amplitude, ν max , for 10 Red Clump (RC) single member (SM) stars in the Kepler open cluster NGC 6819. We derive luminosities and masses for each individual RC star. A co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9eee01fc40ee3785cc0c61a724d7dc88
https://doaj.org/article/1eec126b3ccd47bb809c7456a7ad26d9