Abstract Details
| Name: Aditi Vijayan Affiliation: RRI Conference ID: ASI2018_974 Title : X-ray emission from disc-wide outflows in spiral galaxies Authors and Co-Authors : Kartick C. Sarkar, Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel, Biman Nath, RRI Prateek Sharma, IISc Yuri Shchekinov, Lebedev Physical Institute of Russian Academy of Sciences, ASC, Moscow 117997, Russia Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We study the effect of mass and energy injection due to OB associations spread across the rotating disk of a Milky Way-type galaxy, with the help of 3D hydrodynamic simulations. We compare the resulting X-ray emission with the case of injection of mass and energy from a central region. We find that the predicted X-ray image shows a filamentary structure that arises even in the absence of disk gas inhomogeneity. This structure arises because of warm clumps made of disk material being lifted by the injected gas. We show that as much as half of the total X-ray emission comes from regions surrounding warm clumps that are made of a mix of disk and injected gas. We quantify the mass contained in these ‘bow-shock’ regions. We also show that the top-most region of the outer shock above the central area emits harder X-rays than the rest. Further, we find that mass distribution in different temperature ranges is bimodal, peaking at 10^4 –10^5 K (in warm clumps) and 10^6 –10^7 K (X-ray emitting gas). The mass loading factor is found to decrease with increasing SFR, consistent with previous theoretical estimates and simulations. |