58 Aquarii

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58 Aquarii
Observation data
Epoch J2000       Equinox J2000
Constellation Aquarius
Right ascension 22h 31m 41.31672s [1]
Declination −10° 54′ 19.8148″ [1]
Apparent magnitude  (V)6.39 [2]
Characteristics
Evolutionary stage Main sequence (Aa + Ab)
White dwarf (B) [3]
Spectral type A9/F0 V [4] + K + WD [3]
B−V color index 0.290±0.009 [2]
Astrometry
Radial velocity (Rv)+4.0±4.3 [5]  km/s
Proper motion (μ)RA: +77.347  mas/yr [1]
Dec.: −52.472  mas/yr [1]
Parallax (π)13.4137 ± 0.1535  mas [1]
Distance 243 ± 3  ly
(74.6 ± 0.9  pc)
Absolute magnitude  (MV)2.12 [2]
Orbit
PrimaryAa
CompanionAb
Period (P)830±73 [6] days
Semi-major axis (a)2.3±0.1  AU [3]
Position (relative to A) [3]
ComponentB
Angular distance 132″
Projected separation 9,940 AU
Details
Aa
Mass 1.68 [3]   M☉
Radius 2.4 [3]   R☉
Luminosity 11.73 [2]   L☉
Surface gravity (log g)4.040+0.065
−0.104 [7]   cgs
Temperature 6,990 [3]   K
Metallicity [Fe/H]0.014+0.150
−0.120 [7]   dex
Rotational velocity (v sin i)30.0±10.0 [8]  km/s
Age 1.4 [3]   Gyr
Ab
Mass 0.74 [3]   M☉
Radius 0.67 [3]   R☉
Temperature 4,540 [3]   K
B
Mass 0.70 [3]   M☉
Temperature 9,500 [3]   K
Other designations
CD−11° 5855, GC  31468, HD  213464, HIP  111200, HR  8583, SAO  165147 [9]
Database references
SIMBAD data

58 Aquarii, abbreviated 58 Aqr, is a triple star system [3] in the constellation of Aquarius. 58 Aquarii is its Flamsteed designation. It is a sixth magnitude star with an apparent visual magnitude of 6.39, [2] which means it is a challenge to view with the naked eye. Based upon an annual parallax shift of 13.4  mas , [1] it is located at a distance of 243  light years.

The primary component, named 58 Aquarii Aa, has a stellar classification of A9/F0 V, [4] matching a main sequence star with a spectrum showing mixed traits of an A/F-type. It is a chemically peculiar Am star, showing metallic lines with no magnetic field. [8] The star has 1.7 times the mass of the Sun and 2.4 times the Sun's radius. [3] It is radiating 12 [2] times the Sun's luminosity from its photosphere at an effective temperature of 7,000 K. [3]

The secondary component, named 58 Aquarii Ab, is a K-type dwarf, with around 70% of the Sun's size and an effective temperature around 4,540  K , separated by 2.3  astronomical units from Aa. It was initially uncovered via astrometry from the Hipparcos spacecraft, and later detected via interferometric observations by Idel Waisberg et al. This inner system will become a common envelope binary, when 58 Aquarii Aa expands in the red giant phase. Mass transfer between components is also expected to occur. [3]

The tertiary component, named 58 Aquarii B, is a widely-separated white dwarf, located at 9,940  astronomical units from the inner pair. [3]

Related Research Articles

<span class="mw-page-title-main">Gamma Aquarii</span> Star in the constellation Aquarius

Gamma Aquarii, or γ Aquarii, is a binary star system in the constellation of Aquarius. It has an apparent visual magnitude of 3.849, making it one of the brighter members of the constellation. Based upon parallax measurements taken during the Hipparcos mission, this star is located at a distance of approximately 164 light-years from the Sun. It is drifting closer to the Sun with a radial velocity of −16 km/s. In 1998, Olin J. Eggen included this star as a candidate member of the Hyades Supercluster.

<span class="mw-page-title-main">Beta Aquarii</span> Double star in the constellation Aquarius

Beta Aquarii is a single yellow supergiant star in the constellation of Aquarius. It has the official name Sadalsuud and the Bayer designation β Aquarii, abbreviated Beta Aqr or β Aqr. Based upon parallax measurements obtained during the Hipparcos mission, this component is located at a distance of approximately 540 light years (165 parsecs) from the Sun. It is drifting further away with a radial velocity of 6.5 km/s. The star serves as an IAU radial velocity standard.

<span class="mw-page-title-main">Epsilon Aquarii</span> Binary star in the constellation Aquarius

Epsilon Aquarii, Latinized from ε Aquarii, is a binary star in the equatorial zodiac constellation of Aquarius, located near the western constellation border with Capricornus. It has the proper name Albali, now formally recognized by the IAU. It is visible to the naked eye with an apparent visual magnitude of 3.77, and has an absolute magnitude of −0.46. Based upon parallax measurements taken by the Gaia spacecraft, it is located at a distance of approximately 244 light-years (75 pc) from Earth. The star is drifting closer with a radial velocity of −20 km/s.

<span class="mw-page-title-main">Zeta Sagittarii</span> Triple star system in the constellation Sagittarius

Zeta Sagittarii is a triple star system and the third-brightest star in the constellation of Sagittarius after Kaus Australis and Nunki. Based upon parallax measurements, it is about 88 light-years from the Sun.

<span class="mw-page-title-main">Sigma Sculptoris</span> Variable star in the constellation Sculptor

Sigma Sculptoris, Latinized from σ Sculptoris, is a binary star in the southern constellation of Sculptor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.54. Based upon an annual parallax shift of 14.04 mas as seen from Earth, it is located about 232 light years from the Sun.

<span class="mw-page-title-main">Gamma Trianguli Australis</span> Star in the constellation Triangulum Australe

Gamma Trianguli Australis, Latinized from γ Trianguli Australis, is a single, white-hued star in the southern constellation of Triangulum Australe. Along with Alpha and Beta Trianguli Australis it forms a prominent triangular asterism that gives the constellation its name. It is the third-brightest member of this constellation with an apparent visual magnitude of +2.87. Based upon parallax measurements, Gamma Trianguli Australis is located at a distance of about 190 light-years from Earth.

<span class="mw-page-title-main">Phi Aquarii</span> Star in the constellation Aquarius

Phi Aquarii, Latinized from φ Aquarii, is the Bayer designation for a binary star system in the equatorial constellation of Aquarius. It is visible to the naked eye with a combined apparent visual magnitude of +4.223. Parallax measurements indicate its distance from Earth is roughly 222 light-years, and it is drifting further away with a radial velocity of +2.5 km/s. It is 1.05 degrees south of the ecliptic so it is subject to lunar occultations.

<span class="mw-page-title-main">91 Aquarii</span> Triple star system in the constellation Aquarius

91 Aquarii is a triple star system in the equatorial constellation of Aquarius. It also bears the Bayer designation Psi1 Aquarii. It is visible to the naked eye with an apparent visual magnitude of +4.248. Parallax measurements yield an estimated distance of around 150 light-years from Earth. An extrasolar planet is known to orbit the main star.

94 Aquarii is a triple star system in the equatorial constellation of Aquarius. 94 Aquarii is the Flamsteed designation. The brightest member has an apparent visual magnitude of 5.19, making it visible to the naked eye. The parallax measured by the Gaia spacecraft yields a distance estimate of around 73 light-years from Earth.

5 Aquarii is a single star in the zodiac constellation of Aquarius, located about 830 light years away from the Sun, based on parallax. 5 Aquarii is the Flamsteed designation. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.55. This object is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.

15 Aquarii, abbreviated 15 Aqr, is a single, blue-white star in the zodiac constellation of Aquarius. 15 Aquarii is the Flamsteed designation. It is a dim star that is just visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.83. Based upon an annual parallax shift of 4.6 mas, it is located around 710 light years away. At that distance, the visual magnitude is diminished by an extinction of 0.18 due to interstellar dust. It is moving closer to the Earth with a heliocentric radial velocity of −9 km/s. Relative to its neighbors, 15 Aqr has a peculiar velocity of 28.7+2.9
−3.1 km/s and may be a runaway star.

56 Aquarii, abbreviated 56 Aqr, is a star in the constellation of Aquarius. 56 Aquarii is its Flamsteed designation. It is a sixth magnitude star, having an apparent visual magnitude of 6.36, and thus is a challenge to view with the naked eye. Based upon an annual parallax shift of 5.07 mas, it is located around 643 light years from the Earth. At that distance, the visual magnitude is diminished by an extinction of 0.12 due to interstellar dust. The star is moving closer with a heliocentric radial velocity of −28 km/s. It is a candidate runaway star showing a transverse peculiar velocity of 213.87 km/s.

20 Aquarii, abbreviated 20 Aqr, is a star in the constellation Aquarius. 20 Aquarii is the Flamsteed designation. It is a dim star with an apparent visual magnitude of 6.38. Based upon an annual parallax shift of 15.34 mas, it is located 213 light years away but is moving closer to the Earth with a heliocentric radial velocity of −23 km/s. The star is predicted to come to within 110 light-years in around 1.9 million years.

<span class="mw-page-title-main">29 Aquarii</span> Binary star in the constellation Aquarius

29 Aquarii is a binary star system located around 590 light years away from the Sun in the equatorial constellation of Aquarius. 29 Aquarii is the Flamsteed designation; the system also bears the variable star designation DX Aquarii. It is a challenge to view with the naked eye, appearing as a dim star with a combined apparent visual magnitude of 6.39. The system is moving further from the Earth with a heliocentric radial velocity of about +15 km/s.

Omega<sup>1</sup> Aquarii Star in the constellation Aquarius

Omega1 Aquarii, Latinized from ω1 Aquarii, is the Bayer designation for a binary star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 4.96, this star is faintly visible to the naked eye from the suburbs. The distance to this star can be estimated from the parallax as approximately 138 light-years.

<span class="mw-page-title-main">EW Aquarii</span> Variable star in the constellation Aquarius

EW Aquarii, or HR 8102, is a variable star in the equatorial constellation of Aquarius. With an apparent visual magnitude that fluctuates around 6.47, it is a dim star near the lower limit of visibility to the naked eye. The star is located at a distance of approximately 439 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −39 km/s. The star is positioned near the ecliptic and thus is subject to lunar occultations. It may be a member of the Hyades Group.

4 Aquarii is a binary star system in the constellation Aquarius, located approximately 198 light years away from the Sun. 4 Aquarii is the Flamsteed designation. It is visible to the naked eye as a dim, yellow-white hued star with a combined apparent visual magnitude of 5.99. The system is moving closer to the Earth with a heliocentric radial velocity of −21.5 km/s.

<span class="mw-page-title-main">Lambda Muscae</span> Star in the constellation Musca

Lambda Muscae, Latinized from λ Muscae, and often catalogued HD 102249 or HIP 57363, is a triple star system and the fourth-brightest star in the Southern Hemisphere constellation of Musca. Lambda Muscae visibly makes up the far end of the tail of the visual Musca constellation. It is one of the stars catalogued in astronomer Johann Bayer's 1603 publications Uranometria.

8 Aquarii is a blue-white sub-giant of the spectral class A4IV in the constellation Aquarius. 8 Aquarii is the Flamsteed designation. It is approximately 298 light-years away from Earth, based on parallax. It is approximately 1.7 solar masses and about 3 times hotter than the Sun and thus allows lines of ionized metals with an abundance of metals.

<span class="mw-page-title-main">Gamma Piscis Austrini</span> Triple star system in the constellation Piscis Austrinus

Gamma Piscis Austrini, Latinized from γ Piscis Austrini, is three-star system in the southern constellation of Piscis Austrinus. It is visible to the naked eye with a combined apparent visual magnitude of +4.448. Based upon an annual parallax shift of 15.1 mas as seen from the Earth, the system is located about 216 light years from the Sun.

References

  1. 1 2 3 4 5 6 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.
  2. 1 2 3 4 5 6 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Waisberg, Idel; Klein, Ygal; Katz, Boaz (2023-10-01). "Hidden Companions to Intermediate-mass Stars. XI. Uncovering a 0.7 M☉, 2.3 au Companion in the Astrometric Binary HIP 111200 = 58 Aquarii". Research Notes of the American Astronomical Society. 7 (10): 225. Bibcode:2023RNAAS...7..225W. doi: 10.3847/2515-5172/ad05d0 . ISSN   2515-5172.
  4. 1 2 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  5. ↑ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 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. ↑ Perryman, M. A. C.; et al. (April 1997), "The HIPPARCOS Catalogue", Astronomy & Astrophysics , 323: L49 –L52, Bibcode:1997A&A...323L..49P
  7. 1 2 Huber, Daniel; et al. (2016), "The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8", The Astrophysical Journal Supplement Series, 224 (1): 2, arXiv: 1512.02643 , Bibcode:2016ApJS..224....2H, doi: 10.3847/0067-0049/224/1/2 , S2CID   118621218.
  8. 1 2 Paunzen, E.; et al. (February 2013), "A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society, 429 (1): 119–125, arXiv: 1211.1535 , Bibcode:2013MNRAS.429..119P, doi: 10.1093/mnras/sts318 , S2CID   119231581.
  9. ↑ "58 Aqr". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved October 24, 2018.
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