Discovery and origin of the radio emission from the multiple
stellar system KQ Vel

J 2022

Discovery and origin of the radio emission from the multiple stellar system KQ Vel

LETO, P.; L. M. OSKINOVA; C. S. BUEMI; M. E. SHULTZ; F. CAVALLARO et al.

Základní údaje

Originální název

Discovery and origin of the radio emission from the multiple stellar system KQ Vel

Autoři

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford University Press, 2022, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL, URL

Impakt faktor

Impact factor: 4.800

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/22:00127681

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

stars: early-type; stars: individual: KQVel; stars: magnetic field; stars: neutron; radio continuum: stars

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 4. 1. 2023 13:15, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

KQ Vel is a binary system composed of a slowly rotating magnetic Ap star with a companion of unknown nature. In this paper, we report the detection of its radio emission. We conducted a multifrequency radio campaign using the ATCA interferometer (band-names: 16 cm, 4 cm, and 15 mm). The target was detected in all bands. The most obvious explanation for the radio emission is that it originates in the magnetosphere of the Ap star, but this is shown unfeasible. The known stellar parameters of the Ap star enable us to exploit the scaling relationship for non-thermal gyro-synchrotron emission from early-type magnetic stars. This is a general relation demonstrating how radio emission from stars with centrifugal magnetospheres is supported by rotation. Using KQ Vel’s parameters the predicted radio luminosity is more than five orders of magnitudes lower than the measured one. The extremely long rotation period rules out the Ap star as the source of the observed radio emission. Other possible explanations for the radio emission from KQ Vel, involving its unknown companion, have been explored. A scenario that matches the observed features (i.e. radio luminosity and spectrum, correlation to X-rays) is a hierarchical stellar system, where the possible companion of the magnetic star is a close binary (possibly of RS CVn type) with at least one magnetically active late-type star. To be compatible with the total mass of the system, the last scenario places strong constraints on the orbital inclination of the KQ Vel stellar system.

Citovat

LETO, P.; L. M. OSKINOVA; C. S. BUEMI; M. E. SHULTZ; F. CAVALLARO; C. TRIGILIO; G. UMANA; L. FOSSATI; I. PILLITTERI; Jiří KRTIČKA; R. IGNACE; C. BORDIU; F. BUFANO; G. CATANZARO; L. CERRIGONE; M. GIARRUSSO; A. INGALLINERA; S. LORU; S. P. OWOCKI; K. A. POSTNOV; S. RIGGI; J. ROBRADE a F. LEONE. Discovery and origin of the radio emission from the multiple stellar system KQ Vel. Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2022, roč. 515, č. 4, s. 5523-5538. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stac2163.

@article{2243516,
   author = {Leto, P. and Oskinova, L. M. and Buemi, C. S. and Shultz, M. E. and Cavallaro, F. and Trigilio, C. and Umana, G. and Fossati, L. and Pillitteri, I. and Krtička, Jiří and Ignace, R. and Bordiu, C. and Bufano, F. and Catanzaro, G. and Cerrigone, L. and Giarrusso, M. and Ingallinera, A. and Loru, S. and Owocki, S. P. and Postnov, K. A. and Riggi, S. and Robrade, J. and Leone, F.},
   article_number = {4},
   doi = {https://doi.org/10.1093/mnras/stac2163},
   keywords = {stars: early-type; stars: individual: KQVel; stars: magnetic field; stars: neutron; radio continuum: stars},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Discovery and origin of the radio emission from the multiple stellar system KQ Vel},
   url = {https://arxiv.org/pdf/2207.14075.pdf},
   volume = {515},
   year = {2022}
}

TY  - JOUR
ID  - 2243516
AU  - Leto, P. - Oskinova, L. M. - Buemi, C. S. - Shultz, M. E. - Cavallaro, F. - Trigilio, C. - Umana, G. - Fossati, L. - Pillitteri, I. - Krtička, Jiří - Ignace, R. - Bordiu, C. - Bufano, F. - Catanzaro, G. - Cerrigone, L. - Giarrusso, M. - Ingallinera, A. - Loru, S. - Owocki, S. P. - Postnov, K. A. - Riggi, S. - Robrade, J. - Leone, F.
PY  - 2022
TI  - Discovery and origin of the radio emission from the multiple stellar system KQ Vel
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 515
IS  - 4
SP  - 5523-5538
EP  - 5523-5538
PB  - Oxford University Press
SN  - 00358711
KW  - stars: early-type
KW  - stars: individual: KQVel
KW  - stars: magnetic field
KW  - stars: neutron
KW  - radio continuum: stars
UR  - https://arxiv.org/pdf/2207.14075.pdf
N2  - KQ Vel is a binary system composed of a slowly rotating magnetic Ap star with a companion of unknown nature. In this paper, we report the detection of its radio emission. We conducted a multifrequency radio campaign using the ATCA interferometer (band-names: 16 cm, 4 cm, and 15 mm). The target was detected in all bands. The most obvious explanation for the radio emission is that it originates in the magnetosphere of the Ap star, but this is shown unfeasible. The known stellar parameters of the Ap star enable us to exploit the scaling relationship for non-thermal gyro-synchrotron emission from early-type magnetic stars. This is a general relation demonstrating how radio emission from stars with centrifugal magnetospheres is supported by rotation. Using KQ Vel’s parameters the predicted radio luminosity is more than five orders of magnitudes lower than the measured one. The extremely long rotation period rules out the Ap star as the source of the observed radio emission. Other possible explanations for the radio emission from KQ Vel, involving its unknown companion, have been explored. A scenario that matches the observed features (i.e. radio luminosity and spectrum, correlation to X-rays) is a hierarchical stellar system, where the possible companion of the magnetic star is a close binary (possibly of RS CVn type) with at least one magnetically active late-type star. To be compatible with the total mass of the system, the last scenario places strong constraints on the orbital inclination of the KQ Vel stellar system.
ER  -

LETO, P.; L. M. OSKINOVA; C. S. BUEMI; M. E. SHULTZ; F. CAVALLARO; C. TRIGILIO; G. UMANA; L. FOSSATI; I. PILLITTERI; Jiří KRTIČKA; R. IGNACE; C. BORDIU; F. BUFANO; G. CATANZARO; L. CERRIGONE; M. GIARRUSSO; A. INGALLINERA; S. LORU; S. P. OWOCKI; K. A. POSTNOV; S. RIGGI; J. ROBRADE a F. LEONE. Discovery and origin of the radio emission from the multiple stellar system KQ Vel. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2022, roč.~515, č.~4, s.~5523-5538. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stac2163.

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