HD 44506

Last updated
HD 44506
HD44506LightCurve.png
A light curve for HD 44506, plotted from TESS data [1]
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 20m 36.23979s [2]
Declination −34° 08′ 38.9169″ [2]
Apparent magnitude  (V)5.52 [3] (5.48 - 5.55) [4]
Characteristics
Spectral type B3 V [5]
U−B color index −0.89 [6]
B−V color index −0.20 [6]
Variable type suspected [4]
Astrometry
Radial velocity (Rv)54±4 [7]  km/s
Proper motion (μ)RA: +0.641  mas/yr [2]
Dec.: +20.709  mas/yr [2]
Parallax (π)1.7701 ± 0.0990  mas [2]
Distance 1,800 ± 100  ly
(560 ± 30  pc)
Absolute magnitude  (MV)−3.28 [8]
Details
Mass 12.2±0.3 [9]   M☉
Radius 13.5+0.1
−0.2 [2]   R☉
Luminosity (bolometric)18,951 [10]   L☉
Surface gravity (log g)3.21 [2]   cgs
Temperature 16,838 [11]   K
Metallicity [Fe/H]−0.7801 [2]   dex
Rotational velocity (v sin i)220±22 [12]  km/s
Age 13±2 [9]   Myr
Other designations
90 G. Columbae [13] , CD−34°2806, CPD−34°898, GC  8180, HD  44506, HIP  30143, HR  2288, SAO  196707 [14]
Database references
SIMBAD data

HD 44506 is a solitary, [15] blue hued star located in the southern constellation Columba. The object is also called HR 2288, which is its Bright Star Catalog designation. It has an average apparent magnitude of 5.52, [3] making it faintly visible to the naked eye under ideal conditions. HD 44506 is located relatively far at a distance of 1,800 light years based on Gaia DR3 parallax measurements [2] but is receding with a heliocentric radial velocity of 54  km/s . [7]

Emission lines were first noticed in HD 44506's spectrum in 1964. [16] They were again observed by Karl G. Heinze. [17] It has been suspected to be variable since 1963, [18] but a 1977 search for β Cepheids found inconclusive results; the star is variable in the visual passband but not the ultraviolet passband. [19] As of 2017, the GCVS lists HD 44506 as a suspected variable. [4] In 1982, HD 44506 was officially catalogued as a Be star by Mecerdes Jaschek and Daniel Egret. [20]

This is a hot B-type main-sequence star with a stellar classification of B3 V. [5] It has 12.2 times the mass of the Sun and is estimated to be 13 million years old. HD 44506 has a radius of 13.5  R☉ and an effective temperature of 16,838  K . This yields a bolometric luminosity 18,951 times that of the Sun from its photosphere. Like many hot stars it spins rapidly, having a projected rotational velocity of 220  km/s . [12]

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<span class="mw-page-title-main">HD 24479</span> Star in the constellation Camelopardalis

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<span class="mw-page-title-main">HD 203842</span> Star in the constellation Equuleus

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<span class="mw-page-title-main">HD 93833</span> Star in the constellation Sextans

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<span class="mw-page-title-main">2 Piscis Austrini</span> Star in the constellation Microscopium

2 Piscis Austrini, also known as HD 200763 or simply 2 PsA, is a solitary orange hued star located in the southern constellation Microscopium. It was once part of Piscis Austrinus, the southern fish. The object has an apparent magnitude of 5.2, making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from the Gaia satellite, it is estimated to be 354 light years away from the Solar System. However, it is receding with a poorly constrained heliocentric radial velocity of 3.1 km/s. At its current distance, 2 PsA's brightness is diminished by 0.11 magnitudes due to interstellar dust. It has an absolute magnitude of 0.19.

<span class="mw-page-title-main">HD 26764</span> Star in the constellation Camelopardalis

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HD 89571 is a binary star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with a combined apparent magnitude of 5.51 and is estimated to be 142 light years away from the Solar System. However, it is receding with a heliocentric radial velocity of 3.5 km/s.

<span class="mw-page-title-main">HD 26755</span> Binary star system in Camelopardalis

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<span class="mw-page-title-main">HD 22764</span> Double star; Camelopardalis

HD 22764, also known as HR 1112, is an orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.78, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,770 light years based on Gaia DR3 parallax measurements but is approaching the Solar System with a heliocentric radial velocity of −12.5 km/s. At its current distance, HD 22764's brightness is diminished by 0.66 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 170642</span> A-type dwarf; Corona Australis

HD 170642, also designated as HR 6942 or rarely 13 G. Coronae Australis, is a single star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a white hued star with an apparent magnitude of 5.16. The object is located relatively close at a distance of 229 light years based on Hipparcos parallax measurements, but it is approaching the Solar System with a somewhat constrained heliocentric radial velocity of −6 km/s. At its current distance, HD 170642's brightness is diminished by 0.28 magnitudes due to interstellar dust. It has an absolute magnitude of +0.93.

<span class="mw-page-title-main">HD 31134</span> Star in the constellation of Camelopardalis

HD 31134, also designated as HR 1561, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued star with an apparent magnitude of 5.74. Gaia DR3 parallax measurements place it 473 light years away. It appears to be approaching the Solar System with a heliocentric radial velocity of −15.1 km/s. At its current distance, HD 31134's brightness is diminished by 0.35 magnitudes due to interstellar dust. It has an absolute magnitude of +0.19.

HD 200779 is a solitary star located in the equatorial constellation Equuleus, the foal. It has an apparent magnitude of 8.27, making it readily visible in binoculars but not to the naked eye. The object is located relatively close at a distance of 49 light years based on Gaia DR3 parallax measurements, which makes it the nearest star in Equuleus. It is classified as a high proper motion star, with a total proper motion of 569 mas/yr.

<span class="mw-page-title-main">32 Leonis Minoris</span> Star in the constellation Leo Minor

32 Leonis Minoris, also known as HD 90840, is a solitary star located in the northern constellation Leo Minor. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.78. The object is located relatively far at a distance of 729 light-years based on Gaia DR3 parallax measurements and it is currently receding with a heliocentric radial velocity of 2 km/s, which is somewhat constrained. At its current distance, 32 LMi's brightness is diminished by 0.14 magnitudes due to interstellar extinction and it has an absolute magnitude of −1.02.

<span class="mw-page-title-main">HD 24141</span> Am star?; Camelopardalis

HD 24141, also known as HR 1192, is a star located in the northern constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.79. The object is located relatively close at a distance of 176 light-years based on Gaia DR3 parallax measurements and it is slowly drifting closer with a heliocentric radial velocity of −0.2 km/s. At its current distance, HD 24141's brightness is diminished by 0.17 magnitudes due to interstellar extinction and it has an absolute magnitude of +2.28.

<span class="mw-page-title-main">HD 33541</span> Spectroscopic binary; Camelopardalis

HD 33541, also known as HR 1683, is a white-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.83, making it faintly visible to the naked eye. Gaia DR3 parallax measurements imply a distance of 358 light years and it is currently receding with a heliocentric radial velocity of 9.9 km/s. At its current distance HD 33541's brightness is diminished by 0.16 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.58.

<span class="mw-page-title-main">HD 27322</span> A-type dwarf; Camelopardalis

HD 27322, also known as HR 1342, is a binary star located in the northern circumpolar constellation Camelopardalis. The visible component is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.92. The object is located relatively close at a distance of 313 light-years based on Gaia DR3 parallax measurements, and it is drifting closer with a heliocentric radial velocity of approximately −13 km/s. At its current distance, HD 27322's brightness is diminished by 0.24 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.98.

<span class="mw-page-title-main">HD 28780</span> A-type star in the constellation Camelopardalis

HD 28780, also known as HR 1440, is a solitary white-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.91, making it faintly viisble to the naked eye under ideal conditions. Gaia DR3 parallax measurements imply a distance of 488 light-years, and it is currently drifting closer with a heliocentric radial velocity of −22.6 km/s. At its current distance, HD 28780's brightness is diminished by 0.33 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.26.

<span class="mw-page-title-main">HD 21819</span> A-type main-sequence star; Camelopardalis

HD 21819, also designated as HR 1073, is a solitary star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.97, making faintly visible to the naked eye under ideal conditions. The object is located relatively close at a distance of 248 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of −6.5 km/s. At its current distance, HD 21819's brightness is diminished by an interstellar extinction of 0.17 magnitudes and it has an absolute magnitude of +1.62.

References

  1. ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 13 December 2022.
  2. 1 2 3 4 5 6 7 8 9 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. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  4. 1 2 3 Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN   1562-6881. ISSN   1063-7729. S2CID   125853869.
  5. 1 2 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume III: Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
  6. 1 2 Deutschman, W. A.; Davis, R. J.; Schild, R. E. (February 1976). "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-β photoelectric observations". The Astrophysical Journal Supplement Series. 30: 97. Bibcode:1976ApJS...30...97D. doi: 10.1086/190359 . eISSN   1538-4365. ISSN   0067-0049.
  7. 1 2 Gontcharov, G. A. (November 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. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  8. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  9. 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (October 12, 2010). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1). Oxford University Press (OUP): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x . ISSN   0035-8711.
  10. ↑ Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (April 2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv: 1003.2335 . Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. eISSN   1521-3994. ISSN   0004-6337. S2CID   111387483.
  11. ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x . eISSN   1365-2966. ISSN   0035-8711.
  12. 1 2 Slettebak, A. (September 1982). "Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars". The Astrophysical Journal Supplement Series. 50: 55. Bibcode:1982ApJS...50...55S. doi: 10.1086/190820 . eISSN   1538-4365. ISSN   0067-0049.
  13. ↑ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  14. ↑ "HD 44506". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved November 9, 2022.
  15. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711.
  16. ↑ Jaschek, C.; Jaschek, M.; Kucewicz, B. (1964). "A Survey of Southern Be Stars". Zeitschrift für Astrophysik. 59: 108. Bibcode:1964ZA.....59..108J. ISSN   0372-8331.
  17. ↑ Henize, K. G. (April 1976). "Observations of southern emission-line stars". The Astrophysical Journal Supplement Series. 30: 491. Bibcode:1976ApJS...30..491H. doi: 10.1086/190369 . eISSN   1538-4365. ISSN   0067-0049.
  18. ↑ Cousins, A. W. J.; Stoy, R. H. (1963). Photoelectric magnitudes and colours of southern stars. Bibcode:1963pmcs.book.....C.
  19. ↑ Balona, L. A. (1977). "A search for β Canis Majoris stars". Memoirs of the Royal Astronomical Society. 84: 101. Bibcode:1977MmRAS..84..101B.
  20. ↑ Jaschek, M.; Egret, D. (April 1982). Catalog of Be stars. Vol. 98. pp. 261–263. Bibcode:1982IAUS...98..261J. doi:10.1007/978-94-009-8565-0_44 (inactive 1 January 2025). ISBN   978-90-277-1367-4.{{cite book}}: CS1 maint: DOI inactive as of January 2025 (link)

Further reading

Jerzykiewicz, M.; Sterken, C. (1977). "Search for beta Cephei stars south of declination -20 . I. Incidence of light variability among early B giants and subgiants - summer objects". Acta Astronomica. 27: 365–387. Bibcode:1977AcA....27..365J. ISSN   0001-5237.

Buscombe, W. (1 May 1970). "Line Strengths for Southern OB Stars -- IV: Emission-Line Profiles". Monthly Notices of the Royal Astronomical Society. 148 (1): 79–85. Bibcode:1970MNRAS.148...79B. doi: 10.1093/mnras/148.1.79 . eISSN   1365-2966. ISSN   0035-8711.

Jakate, S. M. (April 1979). "A search for Beta Cephei stars. III - Photometric studies of southern B-type stars". The Astronomical Journal. 84: 552. Bibcode:1979AJ.....84..552J. doi: 10.1086/112448 . ISSN   0004-6256.

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