naa a22 4500 510732291 CHVBK 20180411082957.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1134/S1063772913030050 doi (NATIONALLICENCE)springer-10.1134/S1063772913030050 PG 1316+678: A young pre-cataclysmic binary with weak reflection effects [Elektronische Daten] [V. Shimansky, N. Borisov, I. Bikmaev, N. Sakhibullin, N. Shimanskaya, O. Spiridonova, E. Irtuganov] The PG 1316+678 star is classified as a pre-cataclysmic binary, as is evidenced by its photometric and spectroscopic observations. Its orbital period is determined to be P orb = 3.3803d, which coincides with the photometric period. The intensities of the emission HI and HeI lines are shown to vary synchronously with the brightness of the object (Δm V = 0.065 m , Δm R = 0.08 m ). These variations arise as the UV radiation from the DAO white dwarf is reflected from the surface of the cold companion. The parameters of the binary are estimated and the time of its evolution after the common-envelope phase is determined to be t ≈ 240 000 years. Thus, PG 1316+678 is a young pre-cataclysmic NN Ser variable with the smallest known photometric reflection effect. Pleiades Publishing, Ltd., 2013 Shimansky V. Kazan Federal University, Kazan, Russia aut Borisov N. Special Astrophysical Observatory, Nizhnii Arkhyz, the Republic of Karachaevo-Cherkessia, Russia aut Bikmaev I. Kazan Federal University, Kazan, Russia aut Sakhibullin N. Kazan Federal University, Kazan, Russia aut Shimanskaya N. Kazan Federal University, Kazan, Russia aut Spiridonova O. Special Astrophysical Observatory, Nizhnii Arkhyz, the Republic of Karachaevo-Cherkessia, Russia aut Irtuganov E. Kazan Federal University, Kazan, Russia aut Astronomy Reports SP MAIK Nauka/Interperiodica 57/3(2013-03-01), 212-221 1063-7729 57:3<212 2013 57 11444 https://doi.org/10.1134/S1063772913030050 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913030050 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shimansky V. Kazan Federal University, Kazan, Russia aut NATIONALLICENCE 700 1- Borisov N. Special Astrophysical Observatory, Nizhnii Arkhyz, the Republic of Karachaevo-Cherkessia, Russia aut NATIONALLICENCE 700 1- Bikmaev I. Kazan Federal University, Kazan, Russia aut NATIONALLICENCE 700 1- Sakhibullin N. Kazan Federal University, Kazan, Russia aut NATIONALLICENCE 700 1- Shimanskaya N. Kazan Federal University, Kazan, Russia aut NATIONALLICENCE 700 1- Spiridonova O. Special Astrophysical Observatory, Nizhnii Arkhyz, the Republic of Karachaevo-Cherkessia, Russia aut NATIONALLICENCE 700 1- Irtuganov E. Kazan Federal University, Kazan, Russia aut NATIONALLICENCE 773 0- Astronomy Reports SP MAIK Nauka/Interperiodica 57/3(2013-03-01), 212-221 1063-7729 57:3<212 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer