By analyzing the information from ESA’s XMM-Newton and Gaia satellites, astronomers from the Leibniz Institute for Astrophysics Potsdam (AIP) in Germany and elsewhere have detected a brand new magnetic cataclysmic variable system, most probably of the polar sort. The discovering was reported in a analysis paper revealed March 21 on the pre-print server arXiv.
CVs are binary star systems comprising a white dwarf and a standard star companion. They irregularly improve in brightness by a big issue, then drop again right down to a quiescent state. Polars are a subclass of cataclysmic variables distinguished from different CVs by the presence of a really sturdy magnetic discipline of their white dwarfs.
A workforce of astronomers led by AIP’s Samet Okay, has recognized a brand new cataclysmic variable, which obtained designation XMM J152737.4-205305.9 (or XMM 152737 for brief), by correlating the CV candidate catalog launched by Gaia Information Launch 3 (DR3) with the XMM-Newton archive.
“With the intention to detect and establish new magnetic cataclysmic variables, we correlated the supply coordinates on this catalog [DR3] inside the XMM-Newton’s information archive,” the researchers wrote within the paper.
Based on the research, XMM 152737 has a singular interval that corresponds with the synchronous rotation attribute noticed in polars. The system shows harmonics in its energy spectrum and has a comparatively brief orbital interval, which is often noticed in identified polars.
The supply was discovered to showcase two distinct dips that exhibit a recurring sample with a exact interval of roughly 112.4 minutes. The scientists defined that such dips could also be attributable to an eclipse of the white dwarf by the donor star or an obscuration of the accretion area on the white dwarf by the accretion stream.
The observations present that XMM 152737 has outstanding emission strains similar to hydrogen and helium. This discovering strongly means that the article is a polar-type cataclysmic variable.
The research discovered that XMM 152737 is situated some 3,770 light years away from the Earth and its X-ray luminosity is estimated to be between 30 and 60 nonillion erg/s. Assuming that the system is eclipsing, the authors of the paper calculated that the white dwarf and the secondary star have lots of 0.8 and 0.14 solar lots, respectively.
Summing up the outcomes, the researchers famous that additional observations of XMM 152737 are required with a purpose to decide the origin of the noticed dips on this system. This might shed extra gentle on the properties of this cataclysmic variable and ensure its polar classification.
Extra data:
Samet Okay et al, Discovery of the magnetic cataclysmic variable XMM J152737.4-205305.9 with a deep eclipse-like characteristic, arXiv (2024). DOI: 10.48550/arxiv.2403.14278
Journal data:
arXiv
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