H2O MegaMasers：一个RadioAstron的成功故事
H2O MegaMasers: a RadioAstron success story
摘要：
射电天文学空间-VLBI飞行任务成功地探测到了地空基线很长的河外H2O MegaMaser发射区，基线范围在1.4至26.7地球直径之间。两个星系，NGC 3079和NGC 4258，在基线长于一个ED的初步结果表明，在这些星系的脉泽环境和激发条件是明显不同的。在更长的基线上对NGC 4258的进一步观测将揭示更多单个发射区域的物理学。
英文摘要：
The RadioAstron space-VLBI mission has successfully detected extragalactic H2O MegaMaser emission regions at very long Earth to space baselines ranging between 1.4 and 26.7 Earth Diameters (ED). The preliminary results for two galaxies, NGC3079 and NGC4258, at baselines longer than one ED indicate masering environments and excitation conditions in these galaxies that are distinctly different. Further observations of NGC4258 at longer baselines will reveal more of the physics of individual emission regions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
