HD 53143

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HD 53143
The 74 exocomet belts imaged by ALMA's REASONS survey, showing belts of all shapes, sizes and ages (REASONS comboplot full nonames).jpg
A millimetre image of the disk with the REASONS survey [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Carina [2]
Right ascension 06h 59m 59.65545s [3]
Declination −61° 20′ 10.2546 ″ [3]
Apparent magnitude  (V)6.80 [4]
Characteristics
Spectral type G9 V [5]
U−B color index +0.43 [5]
B−V color index +0.80 [5]
Astrometry
Radial velocity (Rv)+21.3 [6]  km/s
Proper motion (μ)RA: -161.59 [3]   mas/yr
Dec.: +264.67 [3]   mas/yr
Parallax (π)54.57 ± 0.34  mas [3]
Distance 59.8 ± 0.4  ly
(18.3 ± 0.1  pc)
Absolute magnitude  (MV)6.30 [7]
Details
Radius 0.85 ± 0.02 [8]   R☉
Luminosity 0.7 [7]   L☉
Temperature 5,224 [7]   K
Metallicity [Fe/H]0.22 [9]   dex
Rotation 9.6 ± 0.1 days [10]
Rotational velocity (v sin i)4.0 ± 1.0 [8]  km/s
Age 1.01 ± 0.13 [11]   Gyr
Other designations
Gl  260, CD-61° 1535, HD  53143, LTT  2715, SAO  249700, HIP  33690. [12]
Database references
SIMBAD data

HD 53143 is a star in the Carina constellation, located about 59.8 light-years (18.3 parsecs ) from the Earth. With an apparent visual magnitude of 6.80, this star is a challenge to view with the naked eye even under ideal viewing conditions.

Using the technique of gyrochronology, which measures the age of a low-mass star based on its rotation, HD 53143 is about 1,010 ± 130 million years old. [11] Depending on the source, the stellar classification for this star is G9 V [5] or K1V, [7] placing it near the borderline between G-type and K-type main sequence stars. In either case, it is generating energy through the thermonuclear fusion of hydrogen at its core. This star is smaller than the Sun, with about 85% of the Sun's radius. [8] It is emitting only 70% of the Sun's luminosity. The effective temperature of the star's outer envelope is cooler than the Sun at 5,224 K, giving it a golden-orange hue. [7]

Debris disk

Debris disk around the star HD 53143 by the Hubble Space Telescope. The star itself has been hidden by the camera coronograph to make the disk visible. HD 53143.jpg
Debris disk around the star HD 53143 by the Hubble Space Telescope. The star itself has been hidden by the camera coronograph to make the disk visible.

Based upon an excess of infrared emission, a circumstellar debris disk has been found in this system. [13] This disk is inclined at an angle of about 40–50° to the line of sight from the Earth and it has an estimated mass of more than 7 × 1020 kg. (For comparison, the mass of the Moon is 7.3477 × 1022 kg.) This is one of the oldest known debris disk systems and hence may be replenished through the collision of larger bodies. The observed inner edge of the disk is at a distance of 55  Astronomical Units (AU) from the host star, while it stretches out to twice that distance, or 110 AU. This debris disk may extend outside this range, as the measurements are limited by the sensitivity of the instruments. The dust appears evenly distributed with no indication of clumping. [7] The eccentricity of the ring is also one of the highest known, at 0.21. [10]

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<span class="mw-page-title-main">HD 15115</span> F-type subgiant star in the constellation Cetus

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HD 4391 is a triple star system in the constellation Phoenix that is located at a distance of 48.7 light years from the Sun. The primary has a stellar classification of G3V, which is a G-type main sequence star. The physical properties of this star are similar to the Sun, making it a solar analog. However, it is believed to have 22% greater mass than the Sun and is only 1.2 billion years old. The spectrum for this star displays an abnormally low level of beryllium, which may be the result of some form of mixing process.

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<span class="mw-page-title-main">Kappa Reticuli</span> Star system in the constellation Reticulum

Kappa Reticuli (κ Reticuli) is a binary star system in the southern constellation of Reticulum. It is visible to the naked eye, having a combined apparent visual magnitude of +4.71. Based upon an annual parallax shift of 46.12 mas as seen from Earth, it is located 71 light-years from the Sun. Based upon its space velocity components, this star is a member of the Hyades supercluster of stars that share a common motion through space.

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10 Canum Venaticorum is an ordinary star in the northern constellation of Canes Venatici. It has an apparent visual magnitude of 5.95, which, according to the Bortle scale, can be faintly seen with the naked eye from suburban locations. Based upon an annual parallax shift of 0.057 arcseconds, this system is 57.26 light-years from Sun. It is drifting further away with a radial velocity of +80 km/s.

HD 193664 a star in the northern constellation of Draco. HD 193664 is its Henry Draper Catalogue designation. With an apparent magnitude of 5.93, according to the Bortle Scale it is visible to the naked eye from suburban skies. Parallax measurements yield an estimated distance of 57 light years. It has a relatively large proper motion of 0.558 arc seconds per year across the sky, and is drifting closer to the Sun with a radial velocity of −4.7 km/s.

HD 219623 is a solitary star in the northern circumpolar constellation of Cassiopeia. HD 219623 is its Henry Draper Catalogue designation. It has an apparent visual magnitude of 5.59, which lies in the brightness range that is visible to the naked eye. According to the Bortle scale, it can be observed from dark suburban skies. Parallax measurements place it at an estimated distance of around 67.2 light years. It has a relatively high proper motion, advancing 262 mas per year across the celestial sphere.

HD 165185 is the Henry Draper Catalogue designation for a star in the southern zodiac constellation of Sagittarius. It has an apparent visual magnitude of 5.94, which indicates it is a sixth magnitude star that is faintly visible to the naked eye. Parallax measurements give an estimated distance of 55.8 light years from the Sun. It is drifting further away with a heliocentric radial velocity of +15.4 km/s.

HD 189245 is the Henry Draper catalogue designation for a solitary star in the southern constellation of Sagittarius. It has an apparent visual magnitude of 5.66, which means it is faintly visible to the naked eye. Parallax measurements from the Hipparcos satellite indicate a distance of 72 light years from the Sun. It is drifting closer with a heliocentric radial velocity of −13 km/s.

HD 76653 is a single star in the southern constellation Vela. It is faintly visible to the naked eye with an apparent visual magnitude of +5.71. Based upon an annual parallax shift of 41.08 mas as seen from Earth, it is located 79 light years from the Sun. The star is moving closer to the Sun with a radial velocity of −6 km/s. It is a probable co-moving companion of the nearby Delta Velorum; the two have an estimated physical separation of 2.2 ly (0.6605 pc) with similar proper motions. Both are likely members of the Ursa Major association.

References

  1. ↑ Matrà, L.; Marino, S.; Wilner, D. J.; Kennedy, G. M.; Booth, M.; Krivov, A. V.; Williams, J. P.; Hughes, A. M.; Burgo, C. del (2025-01-15). "REsolved ALMA and SMA Observations of Nearby Stars (REASONS): A population of 74 resolved planetesimal belts at millimetre wavelengths". arXiv: 2501.09058 [astro-ph].
  2. ↑ Constellation boundaries, Centre de Données astronomiques de Strasbourg, retrieved 2007-07-24
  3. 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600
  4. ↑ Cousins, A. W. J. (1973), "UBV photometry of some southern stars", Monthly Notes of the Astronomical Society of Southern Africa, 32: 11, Bibcode:1973MNSSA..32...11C
  5. 1 2 3 4 Torres, C. A. O.; et al. (December 2006), "Search for associations containing young stars (SACY). I. Sample and searching method", Astronomy and Astrophysics, 460 (3): 695–708, arXiv: astro-ph/0609258 , Bibcode:2006A&A...460..695T, doi:10.1051/0004-6361:20065602, S2CID   16080025
  6. ↑ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Alan Henry, Batten; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E
  7. 1 2 3 4 5 6 Kalas, Paul; et al. (January 2006), "First Scattered Light Images of Debris Disks around HD 53143 and HD 139664", The Astrophysical Journal, 637 (1): L57–L60, arXiv: astro-ph/0601488 , Bibcode:2006ApJ...637L..57K, doi:10.1086/500305, S2CID   18293244
  8. 1 2 3 Watson, C. A.; et al. (May 2011), "On the alignment of debris discs and their host stars' rotation axis - implications for spin-orbit misalignment in exoplanetary systems", Monthly Notices of the Royal Astronomical Society: Letters , 413 (1): L71 –L75, arXiv: 1009.4132 , Bibcode:2011MNRAS.413L..71W, doi: 10.1111/j.1745-3933.2011.01036.x , S2CID   55106618
  9. ↑ Árnadóttir, A. S.; Feltzing, S.; Lundström, I. (October 2010), "The ability of intermediate-band Strömgren photometry to correctly identify dwarf, subgiant, and giant stars and provide stellar metallicities and surface gravities", Astronomy and Astrophysics, 521: A40, arXiv: 1008.3848 , Bibcode:2010A&A...521A..40A, doi:10.1051/0004-6361/200913544, S2CID   54660535
  10. 1 2 MacGregor, Meredith A.; Hurt, Spencer A.; Stark, Christopher C.; Howard, Ward S.; Weinberger, Alycia J.; Ren, Bin; Schneider, Glenn; Choquet, Elodie; Mawet, Dmitri (2022). "ALMA Images the Eccentric HD 53143 Debris Disk". The Astrophysical Journal Letters. 933 (1): L1. arXiv: 2206.05856 . Bibcode:2022ApJ...933L...1M. doi: 10.3847/2041-8213/ac7729 . S2CID   249626167.
  11. 1 2 Barnes, Sydney A. (November 2007), "Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors", The Astrophysical Journal, 669 (2): 1167–1189, arXiv: 0704.3068 , Bibcode:2007ApJ...669.1167B, doi:10.1086/519295, S2CID   14614725
  12. ↑ "NLTT 17321 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg , retrieved 2007-07-24
  13. ↑ Two new dusty planetary disks may be astrophysical mirrors of our Kuiper Belt, UC Berkeley News, January 19, 2006, retrieved 2007-07-24
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