Статья

Time delays in PG 1115+080: new estimates

V. G. Vakulik1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineV. M. Shulga2Institute of Radio Astronomy of Nat.Ac.Sci. of Ukraine, Krasnoznamennaya 4, 61002 Kharkov, UkraineR. E. Schild3Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAV. S. Tsvetkova2Institute of Radio Astronomy of Nat.Ac.Sci. of Ukraine, Krasnoznamennaya 4, 61002 Kharkov, UkraineV. N. Dudinov1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineA. A. Minakov2Institute of Radio Astronomy of Nat.Ac.Sci. of Ukraine, Krasnoznamennaya 4, 61002 Kharkov, UkraineS. N. Nuritdinov4Astronomical Institute of Ac.Sci.of Uzbekistan, Astronomicheskaya 33, Tashkent, UzbekistanB. P. Artamonov5Sternberg Astronomical Institute, Universitetski Ave. 13, Moscow, RussiaA. Ye. Kochetov1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineG. V. Smirnov1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineA. A. Sergeyev1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineV. V. Konichek1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineI. Ye. Sinelnikov1Institute of Astronomy of Kharkov National University, Sumskaya 35, 61022 Kharkov, UkraineV. V. Bruevich5Sternberg Astronomical Institute, Universitetski Ave. 13, Moscow, RussiaT. Akhunov4Astronomical Institute of Ac.Sci.of Uzbekistan, Astronomicheskaya 33, Tashkent, UzbekistanO. Burkhonov4Astronomical Institute of Ac.Sci.of Uzbekistan, Astronomicheskaya 33, Tashkent, Uzbekistan

Monthly Notices of the Royal Astronomical Society Lettersjournal2009en

ABI

Аннотация

Abstract We report new estimates of the time delays in the quadruple gravitationally lensed quasar PG 1115+080, obtained from the monitoring data in filter R with the 1.5-m telescope at the Maidanak Mountain (Uzbekistan, Central Asia) in 2004–2006. The time delays are 16.4 d between images C and B and 12 d between C and A1+A2, with image C leading for both pairs. The only known estimates of the time delays in PG 1115 are those based on observations by Schechter et al. –23.7 and 9.4 d between images C and B, and C and A1+A2, respectively, – and as revised by Barkana –25 and 13.3 d for the same image components, but with the use of another method. The new values of time delays in PG 1115+080 may be expected to provide larger estimates of the Hubble constant, thus decreasing a diversity between the H0 estimates taken from gravitationally lensed quasars and those taken from other methods.

Темы

Galaxies: Formation, Evolution, Phenomena Pulsars and Gravitational Waves Research Cosmology and Gravitation Theories

Идентификаторы

DOI: 10.1111/j.1745-3933.2009.00770.x

Цитирования и источники

Цитирований: 1 Использованных источников: 29

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