论文标题
从乳白色磁盘中的相对论效应中偏离径向迁移
Spurious Radial Migration from Relativistic Effects in the Milky-Way Disk
论文作者
论文摘要
重力红移在乳状路的潜力中的梯度引起了明显的偏移径向迁移。我表明，这种效果与局部加速度仅相关，该加速度最近是由Gaia EDR3测量的，这意味着$ [-2.4x10^{ - 2}/（R/8KPC）] km/s/s/kpc的光谱偏移。横向多普勒效应产生可比的贡献。两种相对论效应的虚假径向速度等于在宇宙时代越过乳白色磁盘的主要部分，并且必须在未来对恒星的实际径向迁移的测量中进行纠正。
The gradient of the gravitational redshift in the potential of the Milky-Way induces an apparent spurious radial migration. I show that this effect is simply related to the local acceleration, which was measured recently by Gaia eDR3, implying a spectroscopic shift of $[-2.4x10^{-2}/(r/8kpc)] km/s/kpc. The transverse Doppler effect yields a comparable contribution. The spurious radial velocity from both relativistic effects amounts to crossing a major portion of the Milky-Way disk during the age of the universe, and must be corrected for in any future measurement of the actual radial migration of stars.
