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Everything that glitters is not gold: V1315 Cas is not a dormant black hole

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574940" target="_blank" >RIV/67985815:_____/23:00574940 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216224:14310/23:00133043

  • Result on the web

    <a href="https://doi.org/10.1093/mnras/stad2137" target="_blank" >https://doi.org/10.1093/mnras/stad2137</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/mnras/stad2137" target="_blank" >10.1093/mnras/stad2137</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Everything that glitters is not gold: V1315 Cas is not a dormant black hole

  • Original language description

    The quest for quiet or dormant black holes has been ongoing since several decades. Ellipsoidal variables possibly indicate the existence of a very high-mass invisible companion and are thought to be one of the best ways to find such dormant black holes. This, however, is not a panacea as we show here with one example. We indeed report the discovery of a new semidetached interacting binary, V1315 Cas, discovered as an ellipsoidal variable. Using data from photometric surveys (ASAS-SN, TESS) and high-resolution spectroscopy, we derived a nearly circular orbit with an orbital period of P-orb = 34.54 d. The binary system consists of an evolved F-type star primary that is likely still filling its Roche lobe and a B-type star secondary. Using PHOEBE2, we derived the following masses and radii: for the primary, M-p = 0.84 +/- 0.03 M-circle dot and R-p = 18.51(-0.07)(+0.12) R-circle dot, for the secondary, M-s = 7.3 +/- 0.3 M-circle dot and R-s = 4.02(-2.0)(+2.3) R-circle dot. Modelling the evolution of the system with MESA, we found an age of similar to 7.7 x 10(7) yr. The system is at the end of a period of rapid non-conservative mass transfer that reversed its mass ratio, while significantly widening its orbit. The primary shows carbon depletion and nitrogen overabundance, indicative of CNO-processed material being exposed due to mass transfer. An infrared excess and stationary H aemission suggest the presence of a circumstellar or circumbinary disc. V1315 Cas will likely become a detached stripped star binary.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Monthly Notices of the Royal Astronomical Society

  • ISSN

    0035-8711

  • e-ISSN

    1365-2966

  • Volume of the periodical

    524

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    13

  • Pages from-to

    5749-5761

  • UT code for WoS article

    001045132300004

  • EID of the result in the Scopus database

    2-s2.0-85168775570