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Nu Aquilae

January 01, 1970

Nu Aquilae, Latinized from ν Aquilae, is the Bayer designation for a double star in the constellation of Aquila that lies close to the celestial equator. It has an apparent visual magnitude of 4.72 and so is visible to the naked eye. Based upon an annual parallax shift of only 0.8752 mas (with a 10% margin of error), it is believed to lie approximately 3,700 light-years (1,100 parsecs) from Earth.[1] The variable star NU Aquilae has a similar-looking designation but is a separate and unrelated object.

ν Aquilae
Location of ν Aql (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 26m 31.08926s[1]
Declination +00° 20′ 18.8549″[1]
Apparent magnitude (V) 4.72[2] + 9.6[3]
Characteristics
Spectral type F3 Ib[4] + A1 IV/V[3]
U−B color index +0.60[2]
B−V color index +0.59[2]
Astrometry
Radial velocity (Rv)–2.30[5] km/s
Proper motion (μ) RA: −0.562[1] mas/yr
Dec.: −2.294[1] mas/yr
Parallax (π)0.8752 ± 0.0869 mas[1]
Distance3,700 ± 400 ly
(1,100 ± 100 pc)
Absolute magnitude (MV)−5.58[6]
Details
Mass12.5[4] M☉
Radius71.20+14.45
−10.23[7] R☉
Luminosity7,645±1,464[7] L☉
Surface gravity (log g)1.43[4] cgs
Temperature6,396+516
−564[7] K
Metallicity [Fe/H]−0.03[8] dex
Rotational velocity (v sin i)13[9] km/s
Age15[4] Myr
Other designations
ν Aql, CCDM J19265+0021, WDS J19265+0020, 2MASS J19460427+1145429, Gaia EDR3 4304445468512687744
ν Aql A: 32 Aql, BD+00° 4206, HD 182835, HIP 95585, HR 7387, SAO 124628
ν Aql B: BD+00° 4204, SAO 124623
Database references
SIMBADdata

The spectrum of ν Aql A matches a stellar classification of F3, with the luminosity class of Ib indicating this is a supergiant. This is a massive star, with approximately 12.5 times the mass of the sun,[4] and it spans ~71 times the Sun's girth.[7] It is only 15[4] million years old and is radiating around 7,600 times the luminosity of the Sun.[7] The outer atmosphere has an effective temperature of 6,700 K and it has the yellow-white hue of an F-type star.[10]

ν Aql B is a ninth magnitude star 201 arc-seconds distant.[11] Little is known about it except an approximate spectral classification.[3]

References edit

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ a b c Burnichon, M. L. (1975). "Investigations on the intrinsic properties of high-luminosity blue stars inferred from observations of multiple systems". Astronomy and Astrophysics. 45: 383. Bibcode:1975A&A....45..383B.
  4. ^ a b c d e f Lyubimkov, L. S.; et al. (2010). "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 402 (2): 1369–1379. arXiv:0911.1335. Bibcode:2010MNRAS.402.1369L. doi:10.1111/j.1365-2966.2009.15979.x. S2CID 119096173.
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. ^ Kovtyukh, V. V; Chekhonadskikh, F. A; Luck, R. E; Soubiran, C; Yasinskaya, M. P; Belik, S. I (2010). "Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios". Monthly Notices of the Royal Astronomical Society. 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x.
  7. ^ a b c d e 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.
  8. ^ Lyubimkov, Leonid S; Lambert, David L; Korotin, Sergey A; Rachkovskaya, Tamara M; Poklad, Dmitry B (2015). "Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants". Monthly Notices of the Royal Astronomical Society. 446 (4): 3447. arXiv:1411.2722. Bibcode:2015MNRAS.446.3447L. doi:10.1093/mnras/stu2299. S2CID 118473779.
  9. ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode:1970CoAsi.239....1B.
  10. ^ , Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on December 3, 2013, retrieved 2012-01-16
  11. ^ Mason, Brian D.; et al. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.

External links edit

  • Kaler, James B., "Nu Aquilae", Stars, University of Illinois, retrieved 2017-11-16
  • Image ν Aquilae
  • HR 7387
  • CCDM 19265+0021

January 01, 1970
aquilae, latinized, from, aquilae, bayer, designation, double, star, constellation, aquila, that, lies, close, celestial, equator, apparent, visual, magnitude, visible, naked, based, upon, annual, parallax, shift, only, 8752, with, margin, error, believed, app. Nu Aquilae Latinized from n Aquilae is the Bayer designation for a double star in the constellation of Aquila that lies close to the celestial equator It has an apparent visual magnitude of 4 72 and so is visible to the naked eye Based upon an annual parallax shift of only 0 8752 mas with a 10 margin of error it is believed to lie approximately 3 700 light years 1 100 parsecs from Earth 1 The variable star NU Aquilae has a similar looking designation but is a separate and unrelated object n AquilaeLocation of n Aql circled Observation dataEpoch J2000 Equinox J2000 Constellation Aquila Right ascension 19h 26m 31 08926s 1 Declination 00 20 18 8549 1 Apparent magnitude V 4 72 2 9 6 3 Characteristics Spectral type F3 Ib 4 A1 IV V 3 U B color index 0 60 2 B V color index 0 59 2 AstrometryRadial velocity Rv 2 30 5 km sProper motion m RA 0 562 1 mas yr Dec 2 294 1 mas yrParallax p 0 8752 0 0869 mas 1 Distance3 700 400 ly 1 100 100 pc Absolute magnitude MV 5 58 6 DetailsMass12 5 4 M Radius71 20 14 45 10 23 7 R Luminosity7 645 1 464 7 L Surface gravity log g 1 43 4 cgsTemperature6 396 516 564 7 KMetallicity Fe H 0 03 8 dexRotational velocity v sin i 13 9 km sAge15 4 Myr Other designationsn Aql CCDM J19265 0021 WDS J19265 0020 2MASS J19460427 1145429 Gaia EDR3 4304445468512687744n Aql A 32 Aql BD 00 4206 HD 182835 HIP 95585 HR 7387 SAO 124628n Aql B BD 00 4204 SAO 124623 Database referencesSIMBADdata The spectrum of n Aql A matches a stellar classification of F3 with the luminosity class of Ib indicating this is a supergiant This is a massive star with approximately 12 5 times the mass of the sun 4 and it spans 71 times the Sun s girth 7 It is only 15 4 million years old and is radiating around 7 600 times the luminosity of the Sun 7 The outer atmosphere has an effective temperature of 6 700 K and it has the yellow white hue of an F type star 10 n Aql B is a ninth magnitude star 201 arc seconds distant 11 Little is known about it except an approximate spectral classification 3 References edit a b c d e f Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c Ducati J R 2002 VizieR Online Data Catalog Catalogue of Stellar Photometry in Johnson s 11 color system CDS ADC Collection of Electronic Catalogues 2237 Bibcode 2002yCat 2237 0D a b c Burnichon M L 1975 Investigations on the intrinsic properties of high luminosity blue stars inferred from observations of multiple systems Astronomy and Astrophysics 45 383 Bibcode 1975A amp A 45 383B a b c d e f Lyubimkov L S et al 2010 Accurate fundamental parameters for A F and G type Supergiants in the solar neighbourhood Monthly Notices of the Royal Astronomical Society 402 2 1369 1379 arXiv 0911 1335 Bibcode 2010MNRAS 402 1369L doi 10 1111 j 1365 2966 2009 15979 x S2CID 119096173 Gontcharov G A 2006 Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system Astronomy Letters 32 11 759 771 arXiv 1606 08053 Bibcode 2006AstL 32 759G doi 10 1134 S1063773706110065 S2CID 119231169 Kovtyukh V V Chekhonadskikh F A Luck R E Soubiran C Yasinskaya M P Belik S I 2010 Accurate luminosities for F G supergiants from FeII FeI line depth ratios Monthly Notices of the Royal Astronomical Society 408 3 1568 Bibcode 2010MNRAS 408 1568K doi 10 1111 j 1365 2966 2010 17217 x a b c d e Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR Lyubimkov Leonid S Lambert David L Korotin Sergey A Rachkovskaya Tamara M Poklad Dmitry B 2015 Carbon abundance and the N C ratio in atmospheres of A F and G type supergiants and bright giants Monthly Notices of the Royal Astronomical Society 446 4 3447 arXiv 1411 2722 Bibcode 2015MNRAS 446 3447L doi 10 1093 mnras stu2299 S2CID 118473779 Bernacca P L Perinotto M 1970 A catalogue of stellar rotational velocities Contributi Osservatorio Astronomico di Padova in Asiago 239 1 1 Bibcode 1970CoAsi 239 1B The Colour of Stars Australia Telescope Outreach and Education Commonwealth Scientific and Industrial Research Organisation December 21 2004 archived from the original on December 3 2013 retrieved 2012 01 16 Mason Brian D et al 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 Bibcode 2001AJ 122 3466M doi 10 1086 323920 External links editKaler James B Nu Aquilae Stars University of Illinois retrieved 2017 11 16 Image n Aquilae HR 7387 CCDM 19265 0021 Retrieved from https en wikipedia org w index php title Nu Aquilae amp oldid 1079520561, wikipedia, wiki, book, books, library,

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