HW Vigro

HW Virgo (hw Virginis, hw Vir)^[1]^[2]^[3] — Quyoshdan taxminan 590 yorugʻlik yili masofada joylashgan Algol tipidagi tutunli qoʻshaloq yulduz (Yulduzning xususiyatlariga va Yulduz qiymatiga koʻra, Hipparcos sunʼiy yoʻldoshi tomonidan olingan trigonometrik parallaks Virgo yulduz turkumidagi juda yuqori xato^[4]^[5] qiymatiga ega).

Tizim B spektral tipidagi kichik mitti va qizil mittidan iborat. Ikki yulduz bir-birining atrofida 0,116795 kunlik davr bilan aylanadi^[6]^[7].

Taklif etilgan sayyoralar tizimi

2008-yilda tizimdagi tutilish parametrlarida oʻzgarishlarga asoslanib, ikkita yirik Sayyora ikki yulduz atrofida aylanayotganligi aniqlandi: biri Yupiter massasining 8,47 massasiga ega^[8], ikkinchisi Yupiter massasining 19,2 massasiga ega, aylanma davrlari navbati bilan 9,1 va 15,8-yil. Keyinchalik, taxmin qilingan tizim barqaror emasligi, maʼlumotlarning noaniqliklari doirasida ruxsat etilgan parametr maydonida oʻrtacha umr koʻrish vaqti 1000-yildan kam boʻlganligi koʻrsatildi. Dinamik ravishda barqaror orbita yechimi 14,3 massasi bilan orbitaga aylanadigan Yupiter massasining 12-yil va 65 massasining orbitadagi Yupiter 55yil^[9] bilan ishlaydigan ob’yektda olingan boʻlsa-da, tashqi ob’yektning orbital parametrlari yuqori darajada aniqlanmagan, bu ham modelning toʻgʻriligini shubha ostiga qoʻyadi^[10]. Ushbu tizimni modellash muammolari va ushbu turdagi bir nechta boshqa qoʻshaloq sayyoralar atrofida taxmin qilingan sayyoralarning mavjudligi haqida maʼlumot olishda ishlatiladigan tutilish parametrlarining oʻzgarishi noaniq kelib chiqishi boʻlgan degan taxminga olib keladi^[11].

Yana qarang

Manbalar

↑ F.; Van Leeuwen. Validation of the new Hipparcos reduction^(ingl.) // Astronomy and Astrophysics. — EDP Sciences, 2007. — Vol. 474, no. 2. — P. 653. — DOI:10.1051/0004-6361:20078357. — Bibcode:2007A&A...474..653V. —

Arxiv
0708.1752

.

↑ E.; Høg; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. The Tycho-2 catalogue of the 2.5 million brightest stars^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2000. — Vol. 355. — P. L27. — DOI:10.1888/0333750888/2862. — Bibcode:2000A&A...355L..27H.

↑ L. A.; Almeida; Jablonski, F.; Tello, J.; Rodrigues, C. V. A photometric and spectroscopic study of NSVS 14256825: The second sdOB+dM eclipsing binary^(ingl.) // Monthly Notices of the Royal Astronomical Society : journal. — Oxford University Press, 2012. — Vol. 423. — P. 478. — DOI:10.1111/j.1365-2966.2012.20891.x. — Bibcode:2012MNRAS.423..478A. —

Arxiv
1203.1266

.

↑ Lee, Jae Woo; Kim, Seung-Lee; Kim, Chun-Hwey; Koch, Robert H.; Lee, Chung-Uk; Kim, Ho-Il; Park, Jang-Ho. The sdB+M Eclipsing System HW Virginis and its Circumbinary Planets^(ingl.) // The Astronomical Journal : journal. — IOP Publishing, 2009. — Vol. 137, no. 2. — P. 3181—3190. — DOI:10.1088/0004-6256/137/2/3181. — Bibcode:2009AJ....137.3181L. —

Arxiv
0811.3807

.

↑ Kiss, L. L.; Csák, B.; Szatmáry, K.; Furész, G.; Sziládi, K. Spectrophotometry and period analysis of the sdB eclipsing binary HW Virginis^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2000. — Vol. 364. — P. 199—204. — Bibcode:2000A&A...364..199K. —

Arxiv
astro-ph/0010446

.

↑ Gaia DR2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018. — Vol. 1345.
↑ Beers T. C., Placco V. M., Carollo D., Rossi S., Lee Y. S., Norris J. E., Dietz S., Masseron T. Bright metal-poor stars from the Hamburg/ESO Survey. II. A chemodynamical analysis (англ.) // Astrophys. J. / E. Vishniac — IOP Publishing, 2017. — Vol. 835, Iss. 1. — P. 81–81. — ISSN 0004-637X; 1538-4357 — doi:10.3847/1538-4357/835/1/81 — arXiv:1611.03762
↑ Lohr M. E., Norton A. J., Payne S. G., West R. G., Wheatley P. J. Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries (англ.) // Astron. Astrophys. / T. Forveille — EDP Sciences, 2015. — Vol. 578. — P. 136–136. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361/201525747 — arXiv:1505.00941

↑ Horner, J.; Hinse, T. C.; Wittenmyer, R. A.; Marshall, J. P.; Tinney, C. G. A dynamical analysis of the proposed circumbinary HW Virginis planetary system^(ingl.) // Monthly Notices of the Royal Astronomical Society : journal. — Oxford University Press, 2012. — Vol. 427, no. 4. — P. 2812—2823. — DOI:10.1111/j.1365-2966.2012.22046.x. — Bibcode:2012MNRAS.427.2812H. —

Arxiv
1209.0608

.

↑ Beuermann, K.; Dreizler, S.; Hessman, F. V.; Deller, J. The quest for companions to post-common envelope binaries. III. A reexamination of HW Virginis^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2012. — Vol. 543. — P. id.A138. — DOI:10.1051/0004-6361/201219391. — Bibcode:2012A&A...543A.138B. —

Arxiv
1206.3080

.

↑ Jonathan Horner; Robert Wittenmyer; Tobias Hinse; Jonathan Marshall; Alex Mustill (2014). "Wobbling Ancient Binaries - Here Be Planets?". arXiv:1401.6742 [astro-ph.EP].

[hipparcos-1] F.; Van Leeuwen. Validation of the new Hipparcos reduction^(ingl.) // Astronomy and Astrophysics. — EDP Sciences, 2007. — Vol. 474, no. 2. — P. 653. — DOI:10.1051/0004-6361:20078357. — Bibcode:2007A&A...474..653V. —

Arxiv

0708.1752

.

[tycho2-2] E.; Høg; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. The Tycho-2 catalogue of the 2.5 million brightest stars^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2000. — Vol. 355. — P. L27. — DOI:10.1888/0333750888/2862. — Bibcode:2000A&A...355L..27H.

[3] L. A.; Almeida; Jablonski, F.; Tello, J.; Rodrigues, C. V. A photometric and spectroscopic study of NSVS 14256825: The second sdOB+dM eclipsing binary^(ingl.) // Monthly Notices of the Royal Astronomical Society : journal. — Oxford University Press, 2012. — Vol. 423. — P. 478. — DOI:10.1111/j.1365-2966.2012.20891.x. — Bibcode:2012MNRAS.423..478A. —

Arxiv

1203.1266

.

[lee2008-4] Lee, Jae Woo; Kim, Seung-Lee; Kim, Chun-Hwey; Koch, Robert H.; Lee, Chung-Uk; Kim, Ho-Il; Park, Jang-Ho. The sdB+M Eclipsing System HW Virginis and its Circumbinary Planets^(ingl.) // The Astronomical Journal : journal. — IOP Publishing, 2009. — Vol. 137, no. 2. — P. 3181—3190. — DOI:10.1088/0004-6256/137/2/3181. — Bibcode:2009AJ....137.3181L. —

Arxiv

0811.3807

.

[5] Kiss, L. L.; Csák, B.; Szatmáry, K.; Furész, G.; Sziládi, K. Spectrophotometry and period analysis of the sdB eclipsing binary HW Virginis^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2000. — Vol. 364. — P. 199—204. — Bibcode:2000A&A...364..199K. —

Arxiv

astro-ph/0010446

.

[6] Gaia DR2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018. — Vol. 1345.

[7] Beers T. C., Placco V. M., Carollo D., Rossi S., Lee Y. S., Norris J. E., Dietz S., Masseron T. Bright metal-poor stars from the Hamburg/ESO Survey. II. A chemodynamical analysis (англ.) // Astrophys. J. / E. Vishniac — IOP Publishing, 2017. — Vol. 835, Iss. 1. — P. 81–81. — ISSN 0004-637X; 1538-4357 — doi:10.3847/1538-4357/835/1/81 — arXiv:1611.03762

[8] Lohr M. E., Norton A. J., Payne S. G., West R. G., Wheatley P. J. Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries (англ.) // Astron. Astrophys. / T. Forveille — EDP Sciences, 2015. — Vol. 578. — P. 136–136. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361/201525747 — arXiv:1505.00941

[horner2012-9] Horner, J.; Hinse, T. C.; Wittenmyer, R. A.; Marshall, J. P.; Tinney, C. G. A dynamical analysis of the proposed circumbinary HW Virginis planetary system^(ingl.) // Monthly Notices of the Royal Astronomical Society : journal. — Oxford University Press, 2012. — Vol. 427, no. 4. — P. 2812—2823. — DOI:10.1111/j.1365-2966.2012.22046.x. — Bibcode:2012MNRAS.427.2812H. —

Arxiv

1209.0608

.

[beuermann2012-10] Beuermann, K.; Dreizler, S.; Hessman, F. V.; Deller, J. The quest for companions to post-common envelope binaries. III. A reexamination of HW Virginis^(ingl.) // Astronomy and Astrophysics : journal. — EDP Sciences, 2012. — Vol. 543. — P. id.A138. — DOI:10.1051/0004-6361/201219391. — Bibcode:2012A&A...543A.138B. —

Arxiv

1206.3080

.

[11] Jonathan Horner; Robert Wittenmyer; Tobias Hinse; Jonathan Marshall; Alex Mustill (2014). "Wobbling Ancient Binaries - Here Be Planets?". arXiv:1401.6742 [astro-ph.EP].

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