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AS 314

V452 Scuti
Data pengamatan
Epos J2000      Ekuinoks J2000
Rasi bintang Scutum
Asensio rekta  18j 39m 26.10612d[1]
Deklinasi  -13° 50′ 47.1892″[1]
Magnitudo tampak (V) 9.85[2]
Ciri-ciri
Kelas spektrum A0Ia+[3]
Indeks warna U−B +0.12[2]
Indeks warna B−V +0.89[2]
Jenis variabel cLBV[4]
Astrometri
Kecepatan radial (Rv)−50.00[3] km/s
Gerak diri (μ) RA: 1.87[1] mdb/thn
Dek.: -9.55[1] mdb/thn
Paralaks (π)429±1,68[1] mdb
Jarak8,000[5] pc
Magnitudo mutlak (MV)−8.0[3]
Detail
Luminositas79,400[5] L
Suhu10,200[5] K
Penamaan lain
V452 Sct, BD -13°5061, HIP 91477, 2MASS J18392610-1350470
Referensi basis data
SIMBADdata

AS 314, juga dikenal sebagai V452 Scuti, adalah bintang hiper raksasa putih dan kandidat variabel biru bercahaya yang terletak di konstelasi dari Scutum. AS 314 memiliki magnitudo 9,85 dan dapat dilihat dengan teleskop kecil.

Karakteristik

AS 314 belum dipelajari dengan baik hingga tahun 2000, ketika Miroshnichenko et al menentukan jarak untuk bintang ini sekitar 10 kilo parsec (32.600 tahun cahaya), dengan luminositasnya 160.000 kali matahari (L), dan radius 200 kali jari-jari matahari (R), serta massa awal 20 massa matahari (M). Ia kehilangan 2 × 10−5 M setiap tahun (dengan kata lain, 1 M setiap 50.000 tahun) melalui angin bintang yang sangat kuat.[6]

Kelebihan inframerah pada Bintang ini, menunjukkan bahwa itu diselimuti amplop cincin bintang dari debu, yang mungkin menghasilkan ledakan di masa lalu sebagai variabel biru bercahaya, karena lokasinya di diagram Hertzsprung-Russell, posisinya dekat zona yang diduduki oleh bintang-bintang;[6][7] bagaimanapun, bintang ini belum diklasifikasikan sebagai variabel biru bercahaya, tetapi baru sebagai kandidat.[8]

Referensi

  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752alt=Dapat diakses gratis. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Kozok, J. R. (1985). "Photometric observations of emission B-stars in the southern Milky Way". Astronomy and Astrophysics Supplement Series. 61: 387. Bibcode:1985A&AS...61..387K. 
  3. ^ a b c Miroshnichenko, A. S.; Chentsov, E. L.; Klochkova, V. G. (2000). "AS?314: A dusty A?type hypergiant" (PDF). Astronomy and Astrophysics Supplement Series. 144 (3): 379. Bibcode:2000A&AS..144..379M. doi:10.1051/aas:2000216. 
  4. ^ Nazé, Y.; Rauw, G.; Hutsemékers, D. (2012). "The first X-ray survey of Galactic luminous blue variables". Astronomy & Astrophysics. 538: A47. arXiv:1111.6375alt=Dapat diakses gratis. Bibcode:2012A&A...538A..47N. doi:10.1051/0004-6361/201118040. 
  5. ^ a b c van Genderen, A.M. (2001). "S Doradus variables in the Galaxy and the Magellanic Clouds". Astronomy & Astrophysics. 366 (2): 508–531. Bibcode:2001A&A...366..508V. doi:10.1051/0004-6361:20000022alt=Dapat diakses gratis. 
  6. ^ a b Miroshnichenko, A. S.; Chentsov, E. L.; Klochkova, V. G. (2000-06). "AS 314: A dusty A–type hypergiant". Astronomy and Astrophysics Supplement Series. 144 (3): 379–389. doi:10.1051/aas:2000216. ISSN 0365-0138. 
  7. ^ Clark, J. S.; Larionov, V. M.; Arkharov, A. (2005-04-25). "On the population of galactic Luminous Blue Variables". Astronomy & Astrophysics. 435 (1): 239–246. doi:10.1051/0004-6361:20042563. ISSN 0004-6361. 
  8. ^ Nazé, Y.; Rauw, G.; Hutsemékers, D. (2012-01-31). "The first X-ray survey of Galactic luminous blue variables". Astronomy & Astrophysics. 538: A47. doi:10.1051/0004-6361/201118040. ISSN 0004-6361. 

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