PZ Telescopii

PZ Telescopii

Visual band light curves for PZ Telescopii, adapted from Innis et al. (1990)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Telescopium
Right ascension 18h 53m 05.87351s[2]
Declination −50° 10′ 49.8974″[2]
Apparent magnitude (V) 8.33 - 8.63[3]
Characteristics
Spectral type G9 IV[4] + M7±1[5]
B−V color index +0.784±0.021[6]
Variable type BY Dra[3]
Astrometry
Radial velocity (Rv)−4.2±0.2[6] km/s
Proper motion (μ) RA: +16.272(18) mas/yr[2]
Dec.: −85.519(17) mas/yr[2]
Parallax (π)21.1621 ± 0.0223 mas[2]
Distance154.1 ± 0.2 ly
(47.25 ± 0.05 pc)
Absolute magnitude (MV)4.88[6]
Orbit[7]
Period (P)120+110
−30 yr
Semi-major axis (a)27+14
−4 AU
Eccentricity (e)0.52+0.08
−0.10
Inclination (i)91.73+0.36
−0.32°
Longitude of the node (Ω)238.62+0.21
−0.23°
Periastron epoch (T)1997.2+4.7
−1.8
Argument of periastron (ω)
(secondary)		50+50
−30°
Details[8]
Mass1.13±0.03 M☉
Radius1.23±0.04 R☉
Luminosity0.993+0.004
−0.005[9] L☉
Surface gravity (log g)4.41±0.10 cgs
Temperature5,338±200 K
Metallicity [Fe/H]+0.05±0.20 dex
Rotation0.943±0.002[5]
Rotational velocity (v sin i)69.0±0.1[4] km/s
Age24±3 Myr
B
Mass27+25
−9[7] MJup
Surface gravity (log g)< 4.5[5] cgs
Temperature2,700±100 K
Other designations
PZ Tel, CD−50°12190, HD 174429, HIP 92680, SAO 245781, PPM 347231, WDS J18531-5011AB[10]
Database references
SIMBADdata

PZ Telescopii, also known as HD 174429 or simply PZ Tel, is a young star in the constellation Telescopium. Based on parallax measurements, it is located at a distance of 154 light-years from the Sun. The star is drifting closer with a radial velocity of −4 km/s.[6] It is too faint to be visible to the naked eye and is classified as a BY Draconis variable that ranges in apparent visual magnitude from 8.33 down to 8.63 over a period of 22.581 hours (0.94088 days).[3] It is one of the closest and hence brightest pre-main-sequence stars to Earth.[8]

PZ Telescopii has an effective surface temperature of around 5,338 K (the Sun has an approximate surface temperature of 5,778 K), a mass around 1.13 times, and diameter 1.23 times that of the Sun.[8] The star has a high rate of spin, showing a projected rotational velocity of 69 km/s[4] and a rotation period of 22.6 h.[5] It is radiating about the same luminosity as the Sun. PZ Telescopii was originally considered to be a member of the Beta Pictoris moving group; however in a 2012 paper, James Jenkins of Universidad de Chile and colleagues used three methods to calculate its age and came up with a figure of around 24 million years—significantly older than the 12 million years of the association.[8]

This star has an orbiting debris disk calculated to span from a radius of 35 to 165 astronomical units (AU), as well as a substellar companion with about 36 times the mass of Jupiter orbiting at a distance of about 16 AU, discovered in 2009.[11] The companion, currently known as PZ Tel B, is thought to be a brown dwarf; however it is possible (though very unlikely) that it is an extremely large Jupiter-like planet, in which case it would be PZ Tel b, and the first such planet to be directly imaged.[8] Preliminary orbital elements from 2016 give a best fit orbital period of 622.2 years with an eccentricity of 0.755.[5]

The mass and orbit of this companion were updated in 2023 based on Hipparcos and Gaia astrometry, finding a somewhat lower mass, and an edge-on orbit that is eccentric but less so than previous results.[7] It is now included in the NASA Exoplanet Archive since its nominal mass of 27 MJ is below their upper limit of 30 MJ, although the margin of error is large enough that it is still possible that the mass exceeds 30 MJ.[12][13]

References

  1. ^ Innis, J. L.; Coates, D. W.; Thompson, K.; Lloyd Evans, T. (January 1990). "Observations of active-chromosphere stars III - photometry of PZ Tel 1979-1985". Monthly Notices of the Royal Astronomical Society. 242 (3): 306–310. Bibcode:1990MNRAS.242..306I. doi:10.1093/mnras/242.3.306.
  2. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  4. ^ a b c Torres, C. A. O.; Quast, G. R.; Silva, L. da; Reza, R. de la; Melo, C. H. F.; Sterzik, M. (December 1, 2006). "Search for associations containing young stars (SACY) - I. Sample and searching method". Astronomy & Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. ISSN 0004-6361. S2CID 16080025.
  5. ^ a b c d e Maire, A. -L.; et al. (March 2016). "First light of the VLT planet finder SPHERE. II. The physical properties and the architecture of the young systems PZ Telescopii and HD 1160 revisited". Astronomy & Astrophysics. 587: 24. arXiv:1511.04072. Bibcode:2016A&A...587A..56M. doi:10.1051/0004-6361/201526594. S2CID 44360238. A56.
  6. ^ a b c d 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.
  7. ^ a b c Franson, Kyle; Bowler, Brendan P. (June 2023). "Dynamical Mass of the Young Brown Dwarf Companion PZ Tel B". The Astronomical Journal. 165 (6): 246. arXiv:2304.01302. Bibcode:2023AJ....165..246F. doi:10.3847/1538-3881/acca18.
  8. ^ a b c d e Jenkins, J. S.; Pavlenko, Y. V.; Ivanyuk, O.; Gallardo, J.; et al. (2012). "Benchmark Cool Companions: Ages and Abundances for the PZ Telescopii System". Monthly Notices of the Royal Astronomical Society. 420 (4): 3587–98. arXiv:1111.7001. Bibcode:2012MNRAS.420.3587J. doi:10.1111/j.1365-2966.2011.20280.x. S2CID 18735984.
  9. ^ 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.
  10. ^ "V* PZ Tel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 July 2014.
  11. ^ Biller, Beth A.; Liu, Michael C.; et al. (September 2010). "The Gemini NICI Planet-finding Campaign: Discovery of a Close Substellar Companion to the Young Debris Disk Star PZ Tel". The Astrophysical Journal Letters. 720 (1): L82–L87. arXiv:1007.4808. Bibcode:2010ApJ...720L..82B. doi:10.1088/2041-8205/720/1/L82.
  12. ^ "PZ Tel". NASA Exoplanet Archive. Retrieved 29 May 2023.
  13. ^ "Exoplanet Criteria for Inclusion in the Archive". NASA Exoplanet Archive. Retrieved 29 May 2023.

Read other articles:

Bukadaban Feng

Bukadaban FengSyn Qing FengTitik tertinggiKetinggian6.860 m (22.510 ft)[1]Puncak1.922 m (6.306 ft)[1]Masuk dalam daftarUltraKoordinat36°01′27″N 90°51′57″E / 36.02417°N 90.86583°E / 36.02417; 90.86583Koordinat: 36°01′27″N 90°51′57″E / 36.02417°N 90.86583°E / 36.02417; 90.86583 [1]GeografiLetakProvinsi Xinjiang dan Qinghai,TiongkokPegununganPegunungan Kunlun Bukadaban Feng a...

 

Desi Anwar

Desi AnwarLahir11 Desember 1962 (umur 61)Bandung, Jawa BaratKebangsaanIndonesiaPekerjaanJurnalisDikenal atasPembawa acara berita dan dialog di RCTI, MetroTV dan CNN IndonesiaOrang tuaKhaidir Anwar (ayah)Wahidar (ibu)KerabatDewi Fortuna Anwar (kakak)Sri Danti Anwar (kakak) Desi Anwar (lahir 11 Desember 1962) adalah seorang jurnalis, pembawa acara televisi dan penyiar berita Indonesia. Latar belakang Desi Anwar lahir dari pasangan Khaidir Anwar dan Wahidar, yang berasal dari Minangkabau. ...

 

العلاقات الألمانية الإستونية

العلاقات الألمانية الإستونية ألمانيا إستونيا   ألمانيا   إستونيا تعديل مصدري - تعديل   العلاقات الألمانية الإستونية هي العلاقات الثنائية التي تجمع بين ألمانيا وإستونيا.[1][2][3][4][5] مقارنة بين البلدين هذه مقارنة عامة ومرجعية للدولتين: وجه ال...

Burkina Faso

Questa voce o sezione sugli argomenti Burkina Faso e Africa non cita le fonti necessarie o quelle presenti sono insufficienti. Commento: Diverse frasi senza note Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. Burkina Faso (dettagli) (dettagli) (FR) Unité, progrès, justice(IT) Unità, progresso, giustizia Burkina Faso - Localizzazione Dati amministrativiNome completoBu...

 

Sentris Demokrat Internasional

Sentris Demokrat InternationalSingkatanCDITanggal pendirian1961TujuanDemokrasi KristenHumanisme integralDialog antar-agamaKantor pusatBrussels, BelgiaWilayah layanan Seluruh duniaJumlah anggota 73Bahasa resmi Prancis, Prancis dan SpanyolKetuaAndrés Pastrana ArangoAnak organisasiPemuda Sentris Demokrat InternasionalAfiliasiOrganisasi Demokrat Kristen Amerika (ODCA)Partai Rakyat Eropa (EPP)Institut Demokrat Nasional (NDI)Situs webidc-cdi.com Sentris Demokrat Internasional (Inggris: Centris...

 

Faux-Vésigneul

Pour les articles homonymes, voir Faux. Faux-Vésigneul Paysage de la plaine champenoise, à l'est du village. Administration Pays France Région Grand Est Département Marne Arrondissement Châlons-en-Champagne Intercommunalité Communauté de communes de la Moivre à la Coole Maire Mandat Jean-Christophe Mangeart 2020-2026 Code postal 51320 Code commune 51244 Démographie Populationmunicipale 241 hab. (2021 ) Densité 6,1 hab./km2 Géographie Coordonnées 48° 46′ 52...

Bærum

Lambang Bærum Bærum adalah kotamadya di Akershus, Norwegia. Kotamadya ini memiliki 104.690 penduduk pada Januari 2005. Penduduk tuanya berjumlah (67 tahun ke atas) 13,4%. Pada Juni 2005 pengangguran mencapai 2,2%. Ibu kota kotamadya ini ada di Sandvika Sumber Biro Statistik Norwegia

 

R27 (New York City Subway car)

Retired class of New York City Subway car 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: R27 New York City Subway car – news · newspapers · books · scholar · JSTOR (January 2018) (Learn how and when to remove this message) R27An R27 train on the former QJ service leaving Sheepshead BayIn service1960–...

 

Military Security Command of the Korean People's Army

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: Military Security Command of the Korean People's Army – news · newspapers · books · scholar · JSTOR (February 2021) (Learn how and when to remove this message) Military Security CommandActive1948 - PresentCountry North KoreaAllegiance Kim Jong-unTypeCounte...

2022 United States gubernatorial elections

For related races, see 2022 United States elections. 2022 United States gubernatorial elections ← 2021 November 8, 2022 2023 → 39 governorships36 states; 3 territories   Majority party Minority party   Party Republican Democratic Seats before 28 22 Seats after 26 24 Seat change 2 2 Popular vote 43,126,140 43,336,108 Percentage 49.05% 49.29% Seats up 20 16 Seats won 18 18      Democratic hold     ...

 

Victory in Europe Day

Public holiday commemorating the surrender of Nazi Germany (8 May 1945) Victory in Europe DayWinston Churchill waving to the crowds in Whitehall on 8 May celebrating the end of the war, showing the V of VictoryAlso calledVE DayV-E DayObserved by European states National holiday (8 May): European Union Observances (8 May): Norway Ukraine United Kingdom Full list see belowTypeInternationalSignificanceEnd of World War II in EuropeDate8 MayFrequencyAnnualFirst time8 May 1945;&#...

 

List of Brazilian films of the 2000s

Cinema ofBrazil List of Brazilian films Brazilian Animation Pre 1920 1920s 1930s 1930 1931 1932 1933 19341935 1936 1937 1938 1939 1940s 1940 1941 1942 1943 19441945 1946 1947 1948 1949 1950s 1950 1951 1952 1953 19541955 1956 1957 1958 1959 1960s 1960 1961 1962 1963 19641965 1966 1967 1968 1969 1970s 1970 1971 1972 1973 19741975 1976 1977 1978 1979 1980s 1980 1981 1982 1983 19841985 1986 1987 1988 1989 1990s 1990 1991 1992 1993 19941995 1996 1997 1998 1999 2000s 2000 2001 2002 2003 20042005 2...

1932

1932 – MCMXXXII92 år sedan År1929 | 1930 | 193119321933 | 1934 | 1935 Årtionde1910-talet  | 1920-talet 1930-talet1940-talet | 1950-talet Århundrade1800-talet 1900-talet2000-talet Årtusende1000-talet Året Födda | AvlidnaBildanden | Upplösningar Humaniora och kultur Film | Konst | Litteratur | Musik | Radio | Serier | Teater Samhällsvetenskapoch samhälleKrig | Politik | Sport Teknik och vetenskap Vetenskap Andra tider...

 

Guerre d'Espagne

Pour les articles homonymes, voir Guerre d'Espagne (homonymie). Guerre civile espagnole Dans le sens des aiguilles d'une montre à partir d'en haut à gauche : char T-26 de l'armée républicaine pendant la bataille de Belchite ; Granollers après un bombardement par l'aviation allemande ; bombardement au Sahara ; troupes pendant le Siège de l'Alcázar de Tolède ; canon antiaérien de l'armée nationaliste pendant le siège de Madrid ; volontaires de la Brigad...

 

Warren Moon

American gridiron football player (born 1956) For the Australian footballer, see Warren Moon (soccer). American football player Warren MoonMoon in 2021No. 1Position:QuarterbackPersonal informationBorn: (1956-11-18) November 18, 1956 (age 67)Los Angeles, California, U.S.Height:6 ft 3 in (1.91 m)Weight:221 lb (100 kg)Career informationHigh school:Alexander Hamilton (Los Angeles, California)College:West Los Angeles (1974) Washington (1975–1977)Undrafted:1978Career...

Bierock

Beef-filled pastry BierockTypeSavory bread rollPlace of originEastern EuropeMain ingredientsYeast dough, cabbage, onion, ground beef, seasoningsVariationsCheese  Media: Bierock Bierock is a yeast dough pastry pocket sandwich with savory filling,[1] originating in Russia.[2][3] The dish is common among the Volga German community in the United States and Argentina. It was brought to the United States in the 1870s by German Russian Mennonite immigrants.[4]...

 

Intimidation

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: Intimidation – news · newspapers · books · scholar · JSTOR (November 2022) (Learn how and when to remove this message) Intentional behaviour meant to cause a person humiliation, embarrassment, and discomfort Acted intimidation in professional wrestling Intimida...

 

Prime Minister of Kosovo

Head of Government of Kosovo Prime Minister of the Republic of KosovoKryeministri i Republikës së Kosovës (in Albanian)Премијер Pепубликe Косово (in Serbian)National EmblemIncumbentAlbin Kurtisince 22 March 2021Executive branch of the Government of KosovoStyleHis ExcellencyMember ofAssembly of KosovoNominatorPresident of KosovoAppointerAssembly of KosovoTerm lengthFour yearsRenewableInaugural holderJusuf Zejnullahu (de jure)Bajram Rexhepi (de facto)Formation7 Sept...

75 mm Mle 1905 TR

75 mm Mle 1905 TR7,5 cm FK 235(b)Tipocannone da campagna Origine Germania ImpiegoUtilizzatoriArmata belga WehrmachtMagyar királyi honvédség Conflittiprima guerra mondialeseconda guerra mondiale ProduzioneProgettistaKrupp Data progettazione1905 CostruttoreFonderie Royale de Canons (FRC) Date di produzione1905-1914 Entrata in servizio1907 Ritiro dal servizio1945 Numero prodotto348 VariantiMle TRA DescrizionePeso1.190 kg Lunghezza canna1.744 mm (30...

 

Israël antique

Vous lisez un « article de qualité » labellisé en 2013. Sauf précision contraire, les dates de cet article sont sous-entendues « avant l'ère commune » (AEC), c'est-à-dire « avant Jésus-Christ ». Chronologie des principales périodes de l'histoire de l'Israël antique. Écouter cet article Première partie (info sur le fichier)Deuxième partie (info sur le fichier) Ces fichiers audio ont été réalisés à partir de la version du 11 janvier 2022, et ...