UX Lyncis

UX Lyncis

A visual band light curve for UX Lyncis. The top panel shows the variation over a period of years, and the lower plot shows the variation over a period of months. Adapted from Percy and Wilson (2001)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 09h 03m 47.10789s[2]
Declination +38° 44′ 31.6542″[2]
Apparent magnitude (V) 6.6 - 6.78[3]
Characteristics
Evolutionary stage AGB[4]
Spectral type M3III[5] or M6III[6]
B−V color index 1.356±0.011[7]
Variable type SRb:[4]
Astrometry
Radial velocity (Rv)+38.60±0.64[7] km/s
Proper motion (μ) RA: −17.176[2] mas/yr
Dec.: −20.823[2] mas/yr
Parallax (π)3.6035 ± 0.4422 mas[2]
Distanceapprox. 900 ly
(approx. 280 pc)
Absolute bolometric
magnitude
 (Mbol)
−0.15[7]
Details
Radius128.38+0.92
−9.89
[2] R
Luminosity1,766±242[2] L
Temperature3302+135
−11
[2] K
Other designations
UX Lyn, BD+39°2193, HD 77443, HIP 44481, SAO 61226, IRAS 09005+3856[8]
Database references
SIMBADdata

UX Lyncis is a variable star in the faint northern constellation of Lynx, positioned about 3° to the south of the 4th magnitude star 10 Ursae Majoris.[9] This is a red-hued star near the lower threshold of visibility to the naked eye, having an apparent visual magnitude that fluctuates around 6.70.[7] It is located at a distance of approximately 900 light years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +39 km/s.[7]

The stellar classification of this star is M3III,[5] while the infrared spectrum matches a class of M6III.[6] It is an aging red giant on the asymptotic giant branch that has exhausted the supply of both hydrogen and helium in its core, then cooled and expanded. At present it has 128[2] times the radius of the Sun, which is equivalent to 0.60 AU or 60% of the distance from the Sun to the Earth. On average, it radiates a luminosity approximately 1,766 times that of the Sun from its swollen photosphere at an effective temperature of 3,302 K.[2] Infrared observations show little or no evidence for an oxygen-rich dusty shell around the star.[4]

The variability of this star was reported by R. L. Walker in 1970 from the U.S. Naval Observatory.[10] It was given its variable star designation in 1973.[11] UX Lyncis has been classified as a semiregular variable ranging from magnitude 6.6 down to 6.78.[3] Its changes in brightness are complex, with a shorter period of 37.3 days due to the star's pulsations, and a longer period of 420 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode.[1] There is some evidence for an additional weak variability with a 29 day period.[12]

References

  1. ^ a b Percy, John R.; et al. (2001). "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods". The Publications of the Astronomical Society of the Pacific. 113 (786): 983–96. Bibcode:2001PASP..113..983P. doi:10.1086/322153.
  2. ^ a b c d e f g h i j k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. ^ a b Watson, Christopher (4 January 2010). "UX Lyncis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2016.
  4. ^ a b c Sloan, G. C.; Price, S. D. (December 1998). "The Infrared Spectral Classification of Oxygen-rich Dust Shells". The Astrophysical Journal Supplement Series. 119 (2): 141–158. Bibcode:1998ApJS..119..141S. doi:10.1086/313156.
  5. ^ a b Sato, K.; Kuji, S. (November 1990). "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington". Astronomy & Astrophysics Supplement Series. 85: 1069. Bibcode:1990A&AS...85.1069S.
  6. ^ a b Lebzelter, T.; Hron, J. (December 2003). "Technetium and the third dredge up in AGB stars. I. Field stars". Astronomy and Astrophysics. 411 (3): 533–542. arXiv:astro-ph/0310018. Bibcode:2003A&A...411..533L. doi:10.1051/0004-6361:20031458. S2CID 18879265.
  7. ^ a b c d e Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  8. ^ "UX Lyn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-22.
  9. ^ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. Vol. 2. Sky Publishing Corporation and the European Space Agency. p. 620. ISBN 0-933346-83-2.
  10. ^ Walker, R. L. (July 1970). "Light Variations of BD+39°2193". Information Bulletin on Variable Stars. 447: 1. Bibcode:1970IBVS..447....1W.
  11. ^ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (October 1973). "59th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 834. Bibcode:1973IBVS..834....1K. Retrieved 21 December 2024.
  12. ^ Percy, John R.; et al. (April 2003). "Multiperiodicity in Five Small-Amplitude Pulsating Red Giants". The Publications of the Astronomical Society of the Pacific. 115 (806): 479–483. Bibcode:2003PASP..115..479P. doi:10.1086/374199. S2CID 120018973.

Read other articles:

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: List of Australian Army medical units in World War I – news · newspapers · books · scholar · JSTOR (September 2008) (Learn how and when to remove this template message) Australian Field Dressing Station during the Battle of Messines, 7 June 1917 The following ...

 

Синелобый амазон Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:ЗавропсидыКласс:Пт�...

 

Histological stain method H&E redirects here. For other uses, see H&E (disambiguation). Main types of staining seen on H&E stain. Retina (part of the eye) stained with hematoxylin and eosin, cell nuclei stained blue-purple and extracellular material stained pink. Hematoxylin and eosin stain (or haematoxylin and eosin stain or hematoxylin-eosin stain; often abbreviated as H&E stain or HE stain) is one of the principal tissue stains used in histology.[1][2][3...

Allemagneau Concours Eurovision 2022 Données clés Pays  Allemagne Chanson Rockstars Interprète Malik Harris Sélection nationale Radiodiffuseur NDR Type de sélection Germany 12 points Concours Eurovision de la chanson 2022 Position en demi-finale Qualifiée d'office en tant que membre du Big 5 Position en finale 25e et dernier (6 points) 2021 2023 modifier L'Allemagne est l'un des quarante pays participants du Concours Eurovision de la chanson 2022, qui se déroule à Turin en Itali...

 

ONE Championship Combat sport events in 2021 2021 in ONE ChampionshipInformationFirst dateJanuary 22, 2021Last dateDecember 18, 2021EventsTotal events39One Championship24Road To Events15FightsTotal fights274Title fights27← 2020 in ONE2022 in ONE → The year 2021 was the 11th year in the history of the ONE Championship, a mixed martial arts, kickboxing and Muay Thai promotion based in Singapore. ONE Championship 2021 Awards The following fighters won the ONE Championship y...

 

University in Cergy-Pontoise, France Cergy-Pontoise UniversityUniversité de Cergy-PontoiseLatin: Universitas CergiacumTypePublicActive1991–2020Endowment€122 MPresidentFrançois GerminetVice-presidentLouis L'HaridonAcademic staff1,003Administrative staff666Students11,338LocationCergy-Pontoise, FranceAffiliationsUniversity of Paris-SeineWebsitewww.u-cergy.fr Cergy-Pontoise University (French: Université de Cergy-Pontoise) was a French university, located in Cergy-Pontoise, France. On 1 Ja...

1793 expedition during the War of the First Coalition French expedition to SardiniaPart of War of the PyreneesContemporary print of the French bombardment of Cagliari, 1793Date21 December 1792 – 25 May 1793LocationSardinia, Mediterranean Sea40°00′N 09°00′E / 40.000°N 9.000°E / 40.000; 9.000Result Spanish-Sardinian victoryBelligerents Sardinia Spain FranceCommanders and leaders Domenico Millelire Juan de Lángara Laurent TruguetStrength 10,000 5,000Mediter...

 

Torre LapillofrazioneTorre Lapillo – VedutaTorre Lapillo LocalizzazioneStato Italia Regione Puglia Provincia Lecce Comune Porto Cesareo TerritorioCoordinate40°16′51″N 17°50′25″E / 40.280833°N 17.840278°E40.280833; 17.840278 (Torre Lapillo)Coordinate: 40°16′51″N 17°50′25″E / 40.280833°N 17.840278°E40.280833; 17.840278 (Torre Lapillo) Altitudine1 m s.l.m. Abitanti360 Altre informazioniCod. postale73010 Pr...

 

Pour les articles homonymes, voir Hughes. Karen HughesFonctionsSecrétaire d'État adjointe chargée de la diplomatie publique (en)29 juillet 2005 - 14 décembre 2007Margaret D. Tutwiler (en)James K. Glassman (en)Conseiller du Président20 janvier 2001 - 8 juillet 2002Dan Bartlett (en)Directrice de la communication de la Maison-Blanche20 janvier - 2 octobre 2001AmbassadriceBiographieNaissance 27 décembre 1956 (67 ans)ParisNationalités américainefrançaiseFormation Université m�...

First director of the FBI, from 1908 to 1912 This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Stanley Finch – news · newspapers · books · scholar · JSTOR (June 2007) (Learn how and when to remove this message) Stanley FinchChief of the Bureau of InvestigationIn officeJuly 26, 1908 – April 30, 1912P...

 

أستون أبتس   الإحداثيات 51°52′23″N 0°46′13″W / 51.872952777778°N 0.77017222222222°W / 51.872952777778; -0.77017222222222   [1] تقسيم إداري  البلد المملكة المتحدة[2]  التقسيم الأعلى باكينغهامشير  [لغات أخرى]‏  معلومات أخرى HP22  رمز الهاتف 01296  رمز جيونيمز 7290777،  و115930...

 

العلاقات البنمية الزامبية بنما زامبيا   بنما   زامبيا تعديل مصدري - تعديل   العلاقات البنمية الزامبية هي العلاقات الثنائية التي تجمع بين بنما وزامبيا.[1][2][3][4][5] مقارنة بين البلدين هذه مقارنة عامة ومرجعية للدولتين: وجه المقارنة بنما زامبيا �...

هيرفي رونار (بالفرنسية: Hervé Renard)‏    معلومات شخصية الميلاد 30 سبتمبر 1968 (العمر 55 سنة)إيكس ليه با،  فرنسا الطول 180 سنتيمتر  مركز اللعب مدافع الجنسية فرنسا  معلومات النادي النادي الحالي منتخب فرنسا لكرة القدم للسيدات (مدرب) المسيرة الاحترافية1 سنوات فريق م. (هـ.) 1983–1...

 

Text, melody and figured bass of the hymn, Georg Neumark 1657 Organ recording of the hymn Wer nur den lieben Gott läßt walten (He who allows dear God to rule him) is a 1641 hymn by Georg Neumark, who also composed the melody for it. It has seven verses and deals with the Christian putting their trust in God. Its author referred to it as a Trostlied or song of consolation and it first appeared in his Fortgepflantzer musikalisch-poetischer Lustwald (published in Jena in 1657). It also appeare...

 

فيليز موستار تأسس عام 1922 البلد البوسنة والهرسك  الدوري دوري البوسنة والهرسك الممتاز  الموقع الرسمي الموقع الرسمي  الطقم الرسمي الطقم الأساسي الطقم الاحتياطي تعديل مصدري - تعديل   نادي فيليز موستار لكرة القدم (بالبوسنوية: Fudbalski Klub Velež Mostar)‏ هو ناد بوسني لكرة قدم م�...

US congress bill Robert F. Broussard, who proposed the bill in 1910 Two hippopotamuses in their natural habitat, which is not Louisiana House Resolution 23261, also known as the American Hippo bill, was a bill introduced by Representative Robert F. Broussard of Louisiana in 1910 to authorize the importation and release of hippopotamus into the bayous of the state.[1][2] Overview Broussard argued the hippos would eat the invasive water hyacinth that was clogging the rivers and ...

 

Men's relay at the Biathlon World Championships 2020VenueSouth Tyrol ArenaLocationAntholz-Anterselva, ItalyDates22 FebruaryCompetitors108 from 27 nationsTeams27Winning time1:12:35.9Medalists  Émilien JacquelinMartin FourcadeSimon DesthieuxQuentin Fillon Maillet   France Vetle Sjåstad ChristiansenJohannes DaleTarjei BøJohannes Thingnes Bø   Norway Erik LesserPhilipp HornArnd PeifferBenedikt Doll   Germany← 20...

 

Max Theodor Felix von Laue Premio Nobel per la fisica 1914 Max Theodor Felix von Laue (Pfaffendorf, 9 ottobre 1879 – Berlino, 24 aprile 1960) è stato un fisico e cristallografo tedesco, vincitore del Premio Nobel per la fisica nel 1914 per la scoperta della diffrazione dei raggi X da parte dei cristalli. Inoltre s'impegnò anche in ottica, cristallografia, meccanica quantistica, superconduttività e nella teoria della relatività. Von Laue occupò anche numerose posizioni amministrativ...

This article is about the chemical engineer. For other uses, see Bosch (disambiguation). German chemist and engineer (1874–1940) Carl BoschBosch c. 1929Born(1874-08-27)27 August 1874Cologne, German EmpireDied26 April 1940(1940-04-26) (aged 65)Heidelberg, GermanyEducationTechnische Universität BerlinLeipzig UniversityKnown forBosch reactionBosch–Meiser urea processHaber–Bosch processAwards Liebig Medal (1919) Werner von Siemens Ring (1924) Nobel Prize in Chemistry (1931)...

 

駐米大使としてジェラルド・R・フォード大統領(左)と握手する東郷文彦(1976年) 東郷 文彦(とうごう ふみひこ、1915年〈大正4年〉8月18日 - 1985年〈昭和60年〉4月9日)は、日本の昭和時代の外交官。外務事務次官から駐米大使を務めるなど日本の戦後外交の主軸を担ったアメリカスクール外交官の一人であった。 旧姓は本城。東郷茂徳の娘だった東郷いせと結婚し婿�...