▲ 摘要:在许多星系团的中心,炽热(大约107开尔文)星系团内介质可变得足够致密,以至于其本应在短时间内冷却。然而,在大质量中心星系中测量到的恒星形成率很低,且冷却气体中没有软X射线,这表明大多数气体从未冷却过。这就是所谓的冷却流问题。
Together, they also manage two other large-cap growth strategies, Alger Focus Equity and Alger Spectra. Supporting the managers is a team of four seasoned analysts, averaging 20 years of industry ...