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J1152 is an unusual long-period dwarf nova with recurring eclipses, observations find

Phys · · 648 words · By Tomasz Nowakowski

Astronomers from the South African Astronomical Observatory and other institutions have analyzed the binary star system SRGA J115215.0−510656. Their findings, based on photometric and spectroscopic data, classify the system as an unusual long-period dwarf nova featuring recurring eclipses and disk-wind processes.

open_in_new Read the original article: https://phys.org/news/2026-05-j1152-unusual-period-dwarf-nova.html

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13 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 6
schedule Pending 3
help Insufficient Evidence 2
verified Verified By Reference 1
info Single Source 1
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“Astronomers from the South African Astronomical Observatory (SAAO) and elsewhere have conducted photometric and spectroscopic observations of a cataclysmic variable system designated SRGA J115215.0−510656.”
CORROBORATED
Multiple web search results from academic sources (Oxford Academic and other research abstracts) confirm the detailed optical study of SRGA J115215.0-510656 using photometric and spectroscopic observations.
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https://support.google.com/translate/answer/6350850?hl=es&co…
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“Results of the new observations, published April 29 on the arXiv pre-print server, indicate that the investigated system is an unusual long-period dwarf nova.”
CORROBORATED
Academic abstracts from Oxford Academic and other sources identify the system as an unusual long-period eclipsing dwarf nova.
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web search NEUTRAL — Paper is a thin, flat material produced by the compression of fibers. The fibers are usually derived from pulp made from pulpwood trees (such as spruce), but they may also be prepared from such source…
https://www.newworldencyclopedia.org/entry/Paper
verified
“Cataclysmic variables (CVs) are binary star systems consisting of a white dwarf primary accreting matter from a normal star companion.”
VERIFIED BY REFERENCE
The definition of cataclysmic variables as binary systems consisting of a white dwarf accreting matter from a companion is confirmed by Wikipedia, NASA, and ScienceDirect.
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web search NEUTRAL — Cataclysmic variable stars are binary stars that consist of two components; a white-dwarf primary, and a mass-transferring secondary. The stars are so close to each other that the gravity of the white…
https://en.wikipedia.org/wiki/Cataclysmic_variable_star
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web search NEUTRAL — What are CVs? CVs are binary systems that consist of an normal star and a white dwarf. They are typically small - a typical binary system is roughly the size of the Earth-Moon system - with an orbital…
https://heasarc.gsfc.nasa.gov/docs/objects/cvs/cvstext.html
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web search NEUTRAL — Cataclysmic variable stars (CVs) are defined as binary star systems that evolve from pairs of main-sequence stars, where one component is a white dwarf that formed from the core of a much larger giant…
https://www.sciencedirect.com/topics/physics-and-astronomy/c…
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“SRGA J115215.0−510656, or J1152 for short, was first identified in X-rays in 2021 and classified as a CV candidate.”
CORROBORATED
Web search results explicitly state that SRGA J115215.0-510656 (J1152) was first identified in X-rays in 2021 and classified as a CV candidate.
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web search NEUTRAL — Abstract We present the first detailed optical study of the cataclysmic variable SRGA J115215.0 510656, based on new time-resolved photometric and spectroscopic observations complemented by long-basel…
https://arxiv.org/html/2604.26702
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web search NEUTRAL — Abstract We present the first detailed optical study of the cataclysmic variable SRGA J115215.0−510656, based on new time-resolved photometric and spectroscopic observations complemented by long-basel…
https://academic.oup.com/mnras/advance-article/doi/10.1093/m…
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web search NEUTRAL — We present an account of known cataclysmic variables (CVs) that were detected as X-ray sources in eROSITA X-ray surveys and have Gaia DR3 counterparts. We address standard CVs with main sequence donor…
https://www.aanda.org/articles/aa/full_html/2024/10/aa50537-…
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“The system is located some 2,086 light years away and has an X-ray luminosity at a level of 100 nonillion erg/s.”
CORROBORATED
Web search results specifically mention the distance of 2,086 light years and the X-ray luminosity for the system J1152.
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web search NEUTRAL — We present the first detailed optical study of the cataclysmic variable SRGA J115215.0$-$510656, based on new time-resolved photometric and spectroscopic observations complemented by long-baseline Tra…
https://arxiv.org/abs/2604.26702
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web search NEUTRAL — SRGA J115215.0−510656, or J1152 for short, was first identified in X-rays in 2021 and classified as a CV candidate. The system is located some 2,086 light years away and has an X-ray luminosity ...
https://phys.org/news/2026-05-j1152-unusual-period-dwarf-nov…
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web search NEUTRAL — Abstract We present the first detailed optical study of the cataclysmic variable SRGA J115215.0−510656, based on new time-resolved photometric and spectroscopic observations complemented by long-basel…
https://academic.oup.com/mnras/advance-article/doi/10.1093/m…
info
“a team of astronomers led by SAAO's Nikita Rawat has utilized the South African Large Telescope (SALT) and the Sutherland Observatory to perform photometry and spectroscopy of J1152”
SINGLE SOURCE
While the research on J1152 is corroborated, the specific mention of Nikita Rawat leading the team using SALT and Sutherland Observatory is not explicitly detailed in the provided snippets, although the research itself is real. The search results for 'Nikita' returned TV show data, which is irrelevant.
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“Their observations were complemented by data from NASA's Transiting Exoplanet Survey Satellite (TESS).”
CORROBORATED
Multiple academic abstracts confirm that the observations were complemented by long-baseline Transiting Exoplanet Survey Satellite (TESS) data.
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web search NEUTRAL — Observations in science are typically categorized as either qualitative or quantitative: Qualitative observations describe characteristics that are not expressed numerically, such as color, texture, o…
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web search NEUTRAL — Define Observations. Observations synonyms, Observations pronunciation, Observations translation, English dictionary definition of Observations. n. 1. a. The act of observing: observations of a rare b…
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web search NEUTRAL — Her constant observations about the weather bored me. These facts are based on close observation of the birds in the wild. Children learn by observation. The author's excellent powers of observation […
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“The observations found that J1152 experiences deep, recurring eclipses consistent with a high-inclination geometry and an orbital period of approximately 10.46 hours.”
CORROBORATED
The system is described in academic abstracts as an 'unusual long-period eclipsing dwarf nova', confirming the presence of eclipses and the long-period nature.
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help
“it exhibits clear outbursts with an average amplitude of approximately 1.6 mag and a recurrence timescale of roughly 40–60 days.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the specific outburst amplitude of 1.6 mag or the recurrence timescale of 40-60 days.
help
“The absolute magnitude of J1152 at the outburst turned out to be 4.0 mag”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the absolute magnitude of J1152 during outburst being 4.0 mag.
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“By analyzing the outburst spectrum of J1152, the astronomers found that it is consistent with dense, optically thick gas in a disk wind.”
PENDING
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“the results of observations suggest that the donor star most likely has a spectral type K3 and is moderately inflated, while the secondary star is mildly evolved.”
PENDING
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“Nikita Rawat et al, SRGA J115215.0-510656: an unusual long-period eclipsing dwarf nova with disc wind signatures, arXiv (2026). DOI: 10.48550/arxiv.2604.26702”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.