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67 papers · 1 filter
Metal Enrichment via Ram Pressure Stripping in the IGM of the Compact Galaxy Group RGH 80
Haijuan Cui, Haiguang Xu, Junhua Gu +4
By creating and analyzing the two dimensional gas temperature and abundance maps of the RGH 80 compact galaxy group with the high-quality Chandra data, we detect a high-abundance (…
A Search for Infall Evidence in EGOs I: the Northern Sample
Xi Chen, Zhi-Qiang Shen, Jing-jing Li +2
We report the first systematic survey of molecular lines (including HCO+ (1-0) and 12CO, 13CO, C18O (1-0) lines at 3 mm band) towards a new sample of 88 massive young stellar objec…
Stellar Ages and Metallicities of Central and Satellite Galaxies: Implications for Galaxy Formation and Evolution
Anna Pasquali, Anna Gallazzi, Fabio Fontanot +4
Using a large SDSS galaxy group catalogue, we study how the stellar ages and metallicities of central and satellite galaxies depend on stellar mass and halo mass. We find that sate…
Twelve years of X-ray and optical variability in the Seyfert galaxy NGC 4051
E. Breedt, I. M. McHardy, P. Arevalo +7
We discuss the origin of the optical variations in the Narrow line Seyfert 1 galaxy NGC 4051 and present the results of a cross-correlation study using X-ray and optical light curv…
The Stellar Mass Components of Galaxies: Comparing Semi-Analytical Models with Observation
Lei Liu, Xiaohu Yang, H. J. Mo +2
We compare the stellar masses of central and satellite galaxies predicted by three independent semianalytical models with observational results obtained from a large galaxy group c…
Electron heating and acceleration by magnetic reconnection in hot accretion flows
Jian Ding, Feng Yuan, Edison Liang
Both analytical and numerical works show that magnetic reconnection must occur in hot accretion flows. This process will effectively heat and accelerate electrons. In this paper we…