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- W4385328081 abstract "We present a deep search for and analysis of X-ray sources in a sample of dwarf galaxies (M$_{r}$ < -15.5 mag) located within twelve galaxy clusters from the Kapteyn IAC WEAVE INT Cluster Survey (KIWICS) of photometric observations in the $textit{r}$ and $textit{g}$ using the Wide Field Camera (WFC) at the 2.5-m Isaac Newton telescope (INT). We first investigated the optical data, identified 2720 dwarf galaxies in all fields and determined their characteristics; namely, their colors, effective radii, and stellar masses. We then searched the $textit{Chandra}$ data archive for X-ray counterparts of optically detected dwarf galaxies. We found a total of 20 X-ray emitting dwarf galaxies, with X-ray flux ranging from 1.7$times10^{-15}$ to 4.1$times10^{-14}$ erg cm$^{-2}$ s$^{-1}$ and X-ray luminosities varying from 2$times10^{39}$ to 5.4$times10^{41}$ erg s$^{-1}$. Our results indicate that the X-ray luminosity of the sources in our sample is larger than the Eddington luminosity limit for a typical neutron star, even at the lowest observed levels. This leads us to conclude that the sources emitting X-rays in our sample are likely black holes. Additionally, we have employed a scaling relation between black hole and stellar mass to estimate the masses of the black holes in our sample, and have determined a range of black hole masses from 4.6$times10^{4}$ to 1.5$times10^{6}$ M$_odot$. Finally, we find a trend between X-ray to optical flux ratio and X-ray flux. We discuss the implications of our findings and highlight the importance of X-ray observations in studying the properties of dwarf galaxies." @default.
- W4385328081 created "2023-07-28" @default.
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- W4385328081 date "2023-07-26" @default.
- W4385328081 modified "2023-10-17" @default.
- W4385328081 title "The nature of the X-ray sources in dwarf galaxies in nearby clusters from the KIWICS" @default.
- W4385328081 doi "https://doi.org/10.48550/arxiv.2307.14230" @default.
- W4385328081 hasPublicationYear "2023" @default.
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