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Peculiar velocities of SNe Ia in clusters of galaxiesстатья
- Авторы: Balakina E., Pruzhinskaya M.
- Сборник: ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021
- Год издания: 2022
- Место издания: Janus-K 127411, Москва, Учинская ул., д. 1
- Первая страница: 351
- Последняя страница: 353
- DOI: 10.51194/vak2021.2022.1.1.140
- Аннотация: The study of the accelerating expansion of the Universe is possible because of the standardization procedure of Type Ia Supernovae (SNe). However, we still observe the residual dispersion on the Hubble diagram that could be related to environmental effects and unknown peculiar velocities of SNe Ia. In this analysis, we continue to study the peculiar velocities of SNe inside galaxy clusters and their influence on distance modulus measurements. We perform the fit for a low redshift z ≤ 0.15 sample with a fixed value of Ωm for C11 and G10 models and calculate wRMS value to estimate the impact of the peculiar velocity effect. We get the wRMS = 0.1643 for the C11 sample with SNe Ia in clusters if we use the galaxy cluster z_cl instead of the host galaxy z_host, wRMS = 0.1696 in the original data (for G10 wRMS = 0.1617 and wRMS = 0.1643, respectively). The results show the decreasing of residual dispersion on the Hubble diagram. Therefore, this effect is considerable for supernovae in clusters and should be taken into account in future cosmological analyses.
- Добавил в систему: Балакина Елена Алексеевна