title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð´Ð²Ð¾Ð¹Ð½ÑÑ Ð·Ð²ÐµÐ·Ð´Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ñ Ð¼Ð¸Ð»Ð»Ð¸ÑÐµÐºÑÐ½Ð´Ð½ÑÐ¼ Ð¿ÑÐ»ÑÑÐ°ÑÐ¾Ð¼
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Studding binaries with millisecond pulsar
Creators: name: ÐÐ¾Ð±Ð°ÐºÐ¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: ÐÑÐ»ÑÑÐ°ÑÑ
ÐÑÑÑÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð½Ð°Ð±Ð»ÑÐ´ÐµÐ½Ð¸Ñ
Ð½ÐµÐ¹ÑÑÐ¾Ð½Ð½ÑÐµ Ð·Ð²ÐµÐ·Ð´Ñ
Ð¼Ð¸Ð»Ð»Ð¸ÑÐµÐºÑÐ½Ð´Ð½ÑÐµ Ð¿ÑÐ»ÑÑÐ°ÑÑ
Ð±ÐµÐ»ÑÐµ ÐºÐ°ÑÐ»Ð¸ÐºÐ¸

description: ÐÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÐºÐ¾Ð¼Ð¿Ð°Ð½ÑÐ¾Ð½Ð° Ð¼Ð¸Ð»Ð»Ð¸ÑÐµÐºÑÐ½Ð´Ð½Ð¾Ð³Ð¾ Ð¿ÑÐ»ÑÑÐ°ÑÐ° J0621+2514 Ð² Ð´Ð²Ð¾Ð¹Ð½Ð¾Ð¹ Ð·Ð²ÐµÐ·Ð´Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ðµ c Ð¾ÑÐ±Ð¸ÑÐ°Ð»ÑÐ½ÑÐ¼ Ð¿ÐµÑÐ¸Ð¾Ð´Ð¾Ð¼ 1.25 Ð´Ð½Ñ. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¿ÐµÑÐ²ÑÑ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ¿ÐµÐºÑÑÐ¾ÑÐºÐ¾Ð¿Ð¸ÑÐµÑÐºÐ¸Ñ Ð´Ð°Ð½Ð½ÑÑ Ð´Ð»Ñ ÑÑÐ¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ, Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ Ð½Ð° ÐÐ¾Ð»ÑÑÐ¾Ð¼ ÐÐ°Ð½Ð°ÑÑÐºÐ¾Ð¼ ÑÐµÐ»ÐµÑÐºÐ¾Ð¿Ðµ (GTC). ÐÐ½Ð°Ð»Ð¸Ð· Ð¿Ð¾ÐºÐ°Ð·Ð°Ð», ÑÑÐ¾ ÐºÐ¾Ð¼Ð¿Ð°Ð½ÑÐ¾Ð½Ð¾Ð¼ Ð¿ÑÐ»ÑÑÐ°ÑÐ° ÑÐ²Ð»ÑÐµÑÑÑ Ð¼Ð°Ð»Ð¾Ð¼Ð°ÑÑÐ¸Ð²Ð½ÑÐ¹, Ñ Ð¼Ð°ÑÑÐ¾Ð¹ MÐº = (0.11 Â± 0.05)M sun Ð¸ ÑÐ°Ð´Ð¸ÑÑÐ¾Ð¼ R, Ð»ÐµÐ¶Ð°ÑÐ¸Ð¼ Ð² Ð¿ÑÐµÐ´ÐµÐ»Ð°Ñ 0.018 â 0.025 Rsun , Ð±ÐµÐ»ÑÐ¹ ÐºÐ°ÑÐ»Ð¸Ðº Ñ Ð³ÐµÐ»Ð¸ÐµÐ²ÑÐ¼ ÑÐ´ÑÐ¾Ð¼ Ð¸ Ð²Ð¾Ð´Ð¾ÑÐ¾Ð´Ð½Ð¾Ð¹ Ð°ÑÐ¼Ð¾ÑÑÐµÑÐ¾Ð¹. ÐÐ·Ð¼ÐµÑÐµÐ½Ñ ÐµÐ³Ð¾ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ°, Teff = 9694 Â± 112 Ð Ð¸ Ð°Ð¼Ð¿Ð»Ð¸ÑÑÐ´Ð° Ð»ÑÑÐµÐ²Ð¾Ð¹ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ ÐµÐ³Ð¾ Ð²ÑÐ°ÑÐµÐ½Ð¸Ñ Ð¿Ð¾ Ð¾ÑÐ±Ð¸ÑÐµ, Kk = 168 Â± 54ÐºÐ¼/c Ð¡ ÑÑÐµÑÐ¾Ð¼ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ Ð´Ð°Ð½Ð½ÑÑ Ð¸ ÑÑÐ½ÐºÑÐ¸Ð¸ Ð¼Ð°ÑÑ Ð´Ð²Ð¾Ð¹Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð½Ð¾Ð¹ Ð² ÑÐ°Ð´Ð¸Ð¾-Ð½Ð°Ð±Ð»ÑÐ´ÐµÐ½Ð¸ÑÑ Ð¾ÑÐµÐ½ÐµÐ½Ñ Ð²Ð¾Ð·ÑÐ°ÑÑ Ð±ÐµÐ»Ð¾Ð³Ð¾ ÐºÐ°ÑÐ»Ð¸ÐºÐ° â¼ 1.8 Ð¼Ð»ÑÐ´. Ð»ÐµÑ Ð¸ Ð¼Ð°ÑÑÐ° Ð¿ÑÐ»ÑÑÐ°ÑÐ° M = (0.8 Â± 0.5) Msun
description: he subject of this work is "The study of binary stellar systems with millisecond pulsars". We report the results of optical spectral observations of the millisecond pulsar J0621+2514 in a binary stellar system obtained with the 10.4 meters Gran Telescopio CANARIAS (GTC). We made the spectroscopy of the pulsar companion counterpart found early using direct broadband optical imaging. The candidate perfectly coincides by position with the pulsar. We show that its spectrum contains Blamer absorption lines from HÎ± through HÎ´ and it is consistent with a spectrum of a white dwarf (WD) with a hydrogen atmosphere, which thus can be classified as a DA WD. Using the spectral data and WD atmosphere models, we estimate the candidate mass MÐº = (0.11 Â± 0.05)Msun , the effective temperature Teff = 9694 Â± 112, and the amplitude of its radial velocity Kk = 168 Â± 54km/c at the binary orbit likely suggesting that it is indeed the companion of the pulsar. The derived WD proprieties are consistent with a lowâmass helium core WD with a thin hydrogen atmosphere. Using the WD parameters and available radio data, we estimate the characteristic age of the WD â¼ 1.8 Gy and the pulsar mass Mp = (0.8 Â± 0.5)Msun .