From Wikipedia, the free encyclopedia
HD 146624
Observation data
Epoch J2000       Equinox J2000
Constellation Scorpius
Right ascension 16h 18m 17.89900s [1]
Declination −28° 36′ 50.4721″ [1]
Apparent magnitude (V) 4.80 [2]
Characteristics
Spectral type A0 V [3]
B−V color index +0.008±0.018 [2]
Astrometry
Radial velocity (Rv)−13.0±0.8 [4] km/s
Proper motion (μ) RA: −31.971 [1]  mas/ yr
Dec.: −101.295 [1]  mas/ yr
Parallax (π)23.0018 ± 0.3267  mas [1]
Distance142 ± 2  ly
(43.5 ± 0.6  pc)
Absolute magnitude (MV)1.14 [5]
Details
Mass1.49 [3] or 2.13±0.02 [6]  M
Radius1.60 [7]  R
Luminosity21.46+0.53
−0.51
[6]  L
Surface gravity (log g)3.99±0.13 [8]  cgs
Temperature9,441+109
−108
[6]  K
Metallicity [Fe/H]−0.27±0.12 [8]  dex
Rotational velocity (v sin i)39 [6] km/s
Age10 [3]  Myr
Other designations
d Sco, CD−28° 12037, FK5 3288, HD 146624, HIP 79881, HR 6070, SAO 184301 [9]
Database references
SIMBAD data

HD 146624 (d Scorpii) is a single, [3] white-hued star in the southern zodiac constellation of Scorpius. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.80. [2] The distance to HD 146624 can be estimated from its annual parallax shift of 23.0  mas, [1] yielding a separation of 142  light years. At that distance, the visual magnitude is reduced by an extinction of 0.17 due to interstellar dust. [5] It is a member of the Beta Pictoris moving group, a set of ~12 million year old stars that share a common motion through space. [10]

This is an A-type main-sequence star with a stellar classification of A0 V, [3] and is suspected to be chemically peculiar. [11] [6] It is a young star, just 10 [3] million years old, with a projected rotational velocity of 39 km/s. [6] The mass of the star is greater than the Sun's, with De Rosa et al. (2014) estimating 1.49 [3] times the mass of the Sun, while Zorec and Royer (2012) gives a multiplier of 2.13±0.02. [6] It has 1.60 [7] times the Sun's radius and shines with 21 times the Sun's luminosity from its photosphere at an effective temperature of 9,441 K. [6]

The star displays an infrared excess, suggesting a circumstellar disk of orbiting material. This has a mean temperature of 280 K, matching a disk radius of 4.20  AU. [7]

References

  1. ^ a b c d e f 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.
  2. ^ a b c 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.
  3. ^ a b c d e f g De Rosa, R. J.; et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216, arXiv: 1311.7141, Bibcode: 2014MNRAS.437.1216D, doi: 10.1093/mnras/stt1932, S2CID  88503488.
  4. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID  59451347, A61.
  5. ^ a b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv: 1606.09028, Bibcode: 2012AstL...38..694G, doi: 10.1134/S1063773712110035, S2CID  119108982.
  6. ^ a b c d e f g h Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID  55586789.
  7. ^ a b c Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series, 225 (1): 24, arXiv: 1606.01134, Bibcode: 2016ApJS..225...15C, doi: 10.3847/0067-0049/225/1/15, S2CID  118438871, 15.
  8. ^ a b Prugniel, Ph.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv: 1104.4952, Bibcode: 2011A&A...531A.165P, doi: 10.1051/0004-6361/201116769, S2CID  54940439.
  9. ^ "HD 146624". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-03.
  10. ^ Zuckerman, B.; Song, Inseok; Bessell, M. S.; Webb, R. A. (November 2001), "The β Pictoris Moving Group", The Astrophysical Journal, 562 (1): L87–L90, Bibcode: 2001ApJ...562L..87Z, doi: 10.1086/337968, S2CID  120493760.
  11. ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode: 2009A&A...498..961R, doi: 10.1051/0004-6361/200810788.
From Wikipedia, the free encyclopedia
HD 146624
Observation data
Epoch J2000       Equinox J2000
Constellation Scorpius
Right ascension 16h 18m 17.89900s [1]
Declination −28° 36′ 50.4721″ [1]
Apparent magnitude (V) 4.80 [2]
Characteristics
Spectral type A0 V [3]
B−V color index +0.008±0.018 [2]
Astrometry
Radial velocity (Rv)−13.0±0.8 [4] km/s
Proper motion (μ) RA: −31.971 [1]  mas/ yr
Dec.: −101.295 [1]  mas/ yr
Parallax (π)23.0018 ± 0.3267  mas [1]
Distance142 ± 2  ly
(43.5 ± 0.6  pc)
Absolute magnitude (MV)1.14 [5]
Details
Mass1.49 [3] or 2.13±0.02 [6]  M
Radius1.60 [7]  R
Luminosity21.46+0.53
−0.51
[6]  L
Surface gravity (log g)3.99±0.13 [8]  cgs
Temperature9,441+109
−108
[6]  K
Metallicity [Fe/H]−0.27±0.12 [8]  dex
Rotational velocity (v sin i)39 [6] km/s
Age10 [3]  Myr
Other designations
d Sco, CD−28° 12037, FK5 3288, HD 146624, HIP 79881, HR 6070, SAO 184301 [9]
Database references
SIMBAD data

HD 146624 (d Scorpii) is a single, [3] white-hued star in the southern zodiac constellation of Scorpius. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.80. [2] The distance to HD 146624 can be estimated from its annual parallax shift of 23.0  mas, [1] yielding a separation of 142  light years. At that distance, the visual magnitude is reduced by an extinction of 0.17 due to interstellar dust. [5] It is a member of the Beta Pictoris moving group, a set of ~12 million year old stars that share a common motion through space. [10]

This is an A-type main-sequence star with a stellar classification of A0 V, [3] and is suspected to be chemically peculiar. [11] [6] It is a young star, just 10 [3] million years old, with a projected rotational velocity of 39 km/s. [6] The mass of the star is greater than the Sun's, with De Rosa et al. (2014) estimating 1.49 [3] times the mass of the Sun, while Zorec and Royer (2012) gives a multiplier of 2.13±0.02. [6] It has 1.60 [7] times the Sun's radius and shines with 21 times the Sun's luminosity from its photosphere at an effective temperature of 9,441 K. [6]

The star displays an infrared excess, suggesting a circumstellar disk of orbiting material. This has a mean temperature of 280 K, matching a disk radius of 4.20  AU. [7]

References

  1. ^ a b c d e f 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.
  2. ^ a b c 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.
  3. ^ a b c d e f g De Rosa, R. J.; et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216, arXiv: 1311.7141, Bibcode: 2014MNRAS.437.1216D, doi: 10.1093/mnras/stt1932, S2CID  88503488.
  4. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID  59451347, A61.
  5. ^ a b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv: 1606.09028, Bibcode: 2012AstL...38..694G, doi: 10.1134/S1063773712110035, S2CID  119108982.
  6. ^ a b c d e f g h Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID  55586789.
  7. ^ a b c Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series, 225 (1): 24, arXiv: 1606.01134, Bibcode: 2016ApJS..225...15C, doi: 10.3847/0067-0049/225/1/15, S2CID  118438871, 15.
  8. ^ a b Prugniel, Ph.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv: 1104.4952, Bibcode: 2011A&A...531A.165P, doi: 10.1051/0004-6361/201116769, S2CID  54940439.
  9. ^ "HD 146624". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-03.
  10. ^ Zuckerman, B.; Song, Inseok; Bessell, M. S.; Webb, R. A. (November 2001), "The β Pictoris Moving Group", The Astrophysical Journal, 562 (1): L87–L90, Bibcode: 2001ApJ...562L..87Z, doi: 10.1086/337968, S2CID  120493760.
  11. ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode: 2009A&A...498..961R, doi: 10.1051/0004-6361/200810788.

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