HD 141943

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HD 141943
Circumstellar Disks HD 141943 and HD 191089.jpg
Image (top) and artistic illustration (bottom) of HD 141943, the two images on the left
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Lupus [1]
Right ascension 15h 53m 27.29s [2]
Declination −42° 16′ 00.7″ [2]
Apparent magnitude  (V)7.98 [3]
Characteristics
Spectral type G2 [3]
Astrometry
Proper motion (μ)RA: -43.236 mas/yr [2]
Dec.: -65.588 mas/yr [2]
Parallax (π)16.6271±0.0221  mas [2]
Distance 196.2 ± 0.3  ly
(60.14 ± 0.08  pc)
Other designations
NZ Lup, NSV 20423, CD−41 10403, CPD−41 7375, HD 141943, SAO 226339, PPM 321158, TYC 7846-1538-1 [3]
Database references
SIMBAD data

HD 141943 is a young pre-main sequence G-type star with a circumstellar disk. [4] Due to the similarity between HD 141943 and the Sun (Sun-like), it resembles what the Sun would have looked like during the epoch of terrestrial planet formation in Solar System history. [5] Reconstruction of brightness maps of HD 141943 reveal a weak polar spot that changed little in latitude over the 4 year period in which it was observed. It also revealed significant amounts of low latitude features on HD 141943. [6]

It is a potential excellent candidate for telescopes such as the Hubble Space Telescope (HST), the Gemini Planet Imager (GPI) and the Very-Large Telescope (VLT) for follow-up observations of possible planet formation around HD 141943. [7]

Magnetic field

A light curve for NZ Lupi, plotted from TESS data. The 2.2194 day period is marked in red. NZLupLightCurve.png
A light curve for NZ Lupi, plotted from TESS data. The 2.2194 day period is marked in red.

The coronal magnetic field of HD 141943 is dominated by a dipole which shows evidence of a possible tilt. The star also has a high differential rotation, about 8 times the value of the magnetic features of the Sun and 5 times the brightness features. This makes it similar to K-type stars. [10]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 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 3 "V* NZ Lup". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 28 May 2025.
  4. ↑ information@eso.org. "Circumstellar disks HD 141943 and HD 191089". www.esahubble.org. Retrieved 2025-05-27.
  5. ↑ "Astronomical Forensics Uncover Planetary Disks in Hubble Archive - NASA Science". 2014-04-24. Retrieved 2025-05-27.
  6. ↑ Marsden, S. C.; Jardine, M. M.; Ramírez Vélez, J. C.; Alecian, E.; Brown, C. J.; Carter, B. D.; Donati, J.-F.; Dunstone, N.; Hart, R.; Semel, M.; Waite, I. A. (May 2011). "Magnetic fields and differential rotation on the pre-main sequence - I. The early-G star HD 141943 - brightness and magnetic topologies". Monthly Notices of the Royal Astronomical Society. 413 (3): 1922–1938. arXiv: 1101.5859 . Bibcode:2011MNRAS.413.1922M. doi: 10.1111/j.1365-2966.2011.18367.x . ISSN   0035-8711.
  7. ↑ Soummer, Rémi; Perrin, Marshall D.; Pueyo, Laurent; Choquet, Élodie; Chen, Christine; Golimowski, David A.; Brendan Hagan, J.; Mittal, Tushar; Moerchen, Margaret; n'Diaye, Mamadou; Rajan, Abhijith; Wolff, Schuyler; Debes, John; Hines, Dean C.; Schneider, Glenn (2014). "FIVE DEBRIS DISKS NEWLY REVEALED IN SCATTERED LIGHT FROM THE HUBBLE SPACE TELESCOPE NICMOS ARCHIVE". The Astrophysical Journal. 786 (2): L23. arXiv: 1404.5614 . doi:10.1088/2041-8205/786/2/L23.
  8. ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 28 May 2025.
  9. ↑ "NZ Lup". The International Variable Star Index. AAVSO. Retrieved 28 May 2025.
  10. ↑ Marsden, S. C.; Jardine, M. M.; Ramírez Vélez, J. C.; Alecian, E.; Brown, C. J.; Carter, B. D.; Donati, J.-F.; Dunstone, N.; Hart, R.; Semel, M.; Waite, I. A. (2011-05-21). "Magnetic fields and differential rotation on the pre-main sequence – II. The early-G star HD 141943 – coronal magnetic field, Hα emission and differential rotation". Monthly Notices of the Royal Astronomical Society. 413 (3): 1939–1948. arXiv: 1101.5866 . doi: 10.1111/j.1365-2966.2011.18272.x . ISSN   0035-8711.
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