| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 34m 27.25928s [1] |
| Declination | +49° 00′ 57.5065″ [1] |
| Apparent magnitude (V) | +4.68 [2] |
| Characteristics | |
| Evolutionary stage | main sequence [3] |
| Spectral type | A5V |
| B−V color index | 0.132±0.005 [2] |
| Astrometry | |
| Radial velocity (Rv) | −18.3±2.8 [4] km/s |
| Proper motion (μ) |
RA: −128.38
[1]
mas/
yr Dec.: +28.05 [1] mas/ yr |
| Parallax (π) | 18.09 ± 0.19 mas [1] |
| Distance | 180 ± 2
ly (55.3 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.85 [5] |
| Details | |
| Mass | 1.74 [6] M☉ |
| Radius | 1.90 [7] R☉ |
| Luminosity | 40.8+1.1 −1.0 [3] L☉ |
| Surface gravity (log g) | 3.97 [6] cgs |
| Temperature | 8,285±282 [6] K |
| Rotational velocity (v sin i) | 159 [3] km/s |
| Age | 310 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
24 Canum Venaticorum is a single [9] star in the northern constellation of Canes Venatici, located 277 light years away from the Sun. [1] This object is visible to the naked eye as a faint white-hued star with an apparent visual magnitude of +4.68. [2] It is moving closer to the Earth with a heliocentric radial velocity of −18 km/s. [4]
This is an A-type main-sequence star with a stellar classification of A4 V, [10] and it is a shell star with rotationally-broadened lines. [11] It is 310 [6] million years old with a projected rotational velocity of 159 km/s. [3] This rate of spin is giving the star an oblate shape with an equatorial bulge that is 7% larger than the polar radius. [12] The star has 1.74 [6] times the mass of the Sun and 1.9 [7] times the Sun's radius. It is radiating 41 [3] times the Sun's luminosity from its photosphere at an effective temperature of 8,285 K. [6]
24 Canum Venaticorum displays a significant infrared excess at wavelengths of 24μm and 70μm, indicating an orbiting circumstellar debris disk. [11] The signature matches a black body temperature of 464 K for an estimated orbital radius of 1.4 AU. [7]
References
- ^ a b c d e f van Leeuwen, F. (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.
- ^ 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.
- ^ a b c d e Zorec, J.; et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b 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.
- ^ Pizzolato, N.; et al. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode: 2000A&A...361..614P
- ^ a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154, Bibcode: 2015ApJ...804..146D, doi: 10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ a b c Patel, Rahul I.; et al. (May 2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood through Precise Calibration of Saturated WISE Photometry", The Astrophysical Journal Supplement Series, 212 (1): 23, arXiv: 1403.3435, Bibcode: 2014ApJS..212...10P, doi: 10.1088/0067-0049/212/1/10, S2CID 119219094, 10.
- ^ "24 CVn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
- ^ Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976.
- ^ Mora, A.; et al. (2001), "EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars", Astronomy & Astrophysics, 378 (1): 116–131, Bibcode: 2001A&A...378..116M, doi: 10.1051/0004-6361:20011098.
- ^ a b Roberge, Aki; Weinberger, Alycia J. (March 2008), "Debris Disks around Nearby Stars with Circumstellar Gas", The Astrophysical Journal, 676 (1): 509–517, arXiv: 0711.4561, Bibcode: 2008ApJ...676..509R, doi: 10.1086/527314, S2CID 18407657.
- ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID 119273474.
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 34m 27.25928s [1] |
| Declination | +49° 00′ 57.5065″ [1] |
| Apparent magnitude (V) | +4.68 [2] |
| Characteristics | |
| Evolutionary stage | main sequence [3] |
| Spectral type | A5V |
| B−V color index | 0.132±0.005 [2] |
| Astrometry | |
| Radial velocity (Rv) | −18.3±2.8 [4] km/s |
| Proper motion (μ) |
RA: −128.38
[1]
mas/
yr Dec.: +28.05 [1] mas/ yr |
| Parallax (π) | 18.09 ± 0.19 mas [1] |
| Distance | 180 ± 2
ly (55.3 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.85 [5] |
| Details | |
| Mass | 1.74 [6] M☉ |
| Radius | 1.90 [7] R☉ |
| Luminosity | 40.8+1.1 −1.0 [3] L☉ |
| Surface gravity (log g) | 3.97 [6] cgs |
| Temperature | 8,285±282 [6] K |
| Rotational velocity (v sin i) | 159 [3] km/s |
| Age | 310 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
24 Canum Venaticorum is a single [9] star in the northern constellation of Canes Venatici, located 277 light years away from the Sun. [1] This object is visible to the naked eye as a faint white-hued star with an apparent visual magnitude of +4.68. [2] It is moving closer to the Earth with a heliocentric radial velocity of −18 km/s. [4]
This is an A-type main-sequence star with a stellar classification of A4 V, [10] and it is a shell star with rotationally-broadened lines. [11] It is 310 [6] million years old with a projected rotational velocity of 159 km/s. [3] This rate of spin is giving the star an oblate shape with an equatorial bulge that is 7% larger than the polar radius. [12] The star has 1.74 [6] times the mass of the Sun and 1.9 [7] times the Sun's radius. It is radiating 41 [3] times the Sun's luminosity from its photosphere at an effective temperature of 8,285 K. [6]
24 Canum Venaticorum displays a significant infrared excess at wavelengths of 24μm and 70μm, indicating an orbiting circumstellar debris disk. [11] The signature matches a black body temperature of 464 K for an estimated orbital radius of 1.4 AU. [7]
References
- ^ a b c d e f van Leeuwen, F. (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.
- ^ 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.
- ^ a b c d e Zorec, J.; et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b 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.
- ^ Pizzolato, N.; et al. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode: 2000A&A...361..614P
- ^ a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154, Bibcode: 2015ApJ...804..146D, doi: 10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ a b c Patel, Rahul I.; et al. (May 2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood through Precise Calibration of Saturated WISE Photometry", The Astrophysical Journal Supplement Series, 212 (1): 23, arXiv: 1403.3435, Bibcode: 2014ApJS..212...10P, doi: 10.1088/0067-0049/212/1/10, S2CID 119219094, 10.
- ^ "24 CVn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
- ^ Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976.
- ^ Mora, A.; et al. (2001), "EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars", Astronomy & Astrophysics, 378 (1): 116–131, Bibcode: 2001A&A...378..116M, doi: 10.1051/0004-6361:20011098.
- ^ a b Roberge, Aki; Weinberger, Alycia J. (March 2008), "Debris Disks around Nearby Stars with Circumstellar Gas", The Astrophysical Journal, 676 (1): 509–517, arXiv: 0711.4561, Bibcode: 2008ApJ...676..509R, doi: 10.1086/527314, S2CID 18407657.
- ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID 119273474.
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