UDK 53 Физика
UDK 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
UDK 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
UDK 523 Солнечная система
UDK 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
UDK 52-1 Метод изучения
UDK 52-6 Излучение и связанные с ним процессы
GRNTI 41.00 АСТРОНОМИЯ
GRNTI 29.35 Радиофизика. Физические основы электроники
GRNTI 29.31 Оптика
GRNTI 29.33 Лазерная физика
GRNTI 29.27 Физика плазмы
GRNTI 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
OKSO 03.06.01 Физика и астрономия
OKSO 03.05.01 Астрономия
OKSO 03.04.03 Радиофизика
BBK 2 ЕСТЕСТВЕННЫЕ НАУКИ
BBK 223 Физика
TBK 614 Астрономия
TBK 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
A deep RATAN-600 Zenith Field (RZF) survey at wavelength ${\lambda}$ = 7.6 cm on the declination of the 3C84 radio source. In the center of the survey region, 448 objects were detected, and 73 of them have ultra-steep spectra (USS), which are the main indicator for finding possible candidates for distant galaxies. Optical identifications for 31 of the USS objects were made using the SDSS surveys have been used. It turns out that 23 objects are galaxies and 8 are star-forming objects. Photometric redshifts ($z_{\rm ph}$) and radio luminosities at 3.9 and 1.4 GHz ($L_{3.9}$ and $L_{1.4}$) are determined for 31 objects with spectral indices $\alpha < -1.1$, $S_{\rm \nu} \sim \nu^\alpha$ for objects with published photometric data. In the sample of USS objects, 15 galaxies have $z_{\rm ph}< 0.5$, and 8 of them have relatively high $L_{1.4} > 10^{26}$ W/Hz of type FR II. Seven galaxies at $z_{\rm ph} > 0.5$ are also of type FR II. Five sources are of intermediate type FR I-FR II. Only three radio galaxies at $z_{\rm ph}<0.5$ turned out to be a rare nearby galaxy with relatively low $L_{1.4}<10^{25}$ W/Hz (FR I). These radio sources are either located in the dense intergalactic medium of rich clusters or are confined within their host galaxies. Almost all of these sources can be observed with the SAO 6-m telescope. Galaxies with $L_{1.4} > 10^{26}$ W/Hz (FR II) have magnitudes $18
surveys; radio continuum: general; radio continuum: galaxies; galaxies: active
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