Astronomy:HD 141943
280px Image (top) and artistic illustration (bottom) of HD 141943, the two images on the left | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lupus[1] |
| Right ascension | 15h 53m 27.29s[2] |
| Declination | −42° 16′ 00.7″[2] |
| Apparent magnitude (V) | 7.98[3] |
| Characteristics | |
| Evolutionary stage | PMS[4] |
| Spectral type | G2[3] |
| Astrometry | |
| Proper motion (μ) | RA: −43.236[2] mas/yr Dec.: −65.588[2] mas/yr |
| Parallax (π) | 16.6271 ± 0.0221[2] mas |
| Distance | 196.2 ± 0.3 ly (60.14 ± 0.08 pc) |
| Details | |
| Mass | 1.09[5] M☉ |
| Radius | 1.35[6] R☉ |
| Luminosity | 2.07[6] L☉ |
| Surface gravity (log g) | 4.22[6] cgs |
| Temperature | 5,963[6] K |
| Rotation | 2.2 days[5] |
| Rotational velocity (v sin i) | 24.4[5] km/s |
| Age | 30[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 141943 is a young pre-main sequence G-type star with a circumstellar disk.[7] 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.[8] 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.[9]
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.[4]
Magnetic field
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.[12]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 "V* NZ Lup". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+NZ+Lup.
- ↑ 4.0 4.1 Soummer, Rémi; Perrin, Marshall D.; Pueyo, Laurent; Choquet, Élodie; Chen, Christine; Golimowski, David A.; Hagan, J. Brendan; Mittal, Tushar et al. (2014). "Five Debris Disks Newly Revealed in Scattered Light from the Hubble Space Telescope NICMOS Archive". The Astrophysical Journal 786 (2): L23. doi:10.1088/2041-8205/786/2/L23. Bibcode: 2014ApJ...786L..23S.
- ↑ 5.0 5.1 5.2 5.3 Grandjean, A.; Lagrange, A.-M.; Meunier, N.; Rubini, P.; Desidera, S.; Galland, F.; Borgniet, S.; Zicher, N. et al. (2021). "A SOPHIE RV search for giant planets around young nearby stars (YNS). A combination with the HARPS YNS survey". Astronomy and Astrophysics 650. doi:10.1051/0004-6361/202039672. Bibcode: 2021A&A...650A..39G.
- ↑ 6.0 6.1 6.2 6.3 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ information@eso.org. "Circumstellar disks HD 141943 and HD 191089" (in en). https://www.esahubble.org/images/opo1416a/.
- ↑ "Astronomical Forensics Uncover Planetary Disks in Hubble Archive - NASA Science" (in en-US). 2014-04-24. https://science.nasa.gov/missions/hubble/astronomical-forensics-uncover-planetary-disks-in-hubble-archive/.
- ↑ Marsden, S. C.; Jardine, M. M.; Ramírez Vélez, J. C.; Alecian, E.; Brown, C. J.; Carter, B. D.; Donati, J.-F.; Dunstone, N. et al. (May 2011). "Magnetic fields and differential rotation on the pre-main sequence - I. The early-G star HD 141943 - brightness and magnetic topologies" (in en). Monthly Notices of the Royal Astronomical Society 413 (3): 1922–1938. doi:10.1111/j.1365-2966.2011.18367.x. ISSN 0035-8711. Bibcode: 2011MNRAS.413.1922M.
- ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html.
- ↑ "NZ Lup". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=136678.
- ↑ Marsden, S. C.; Jardine, M. M.; Ramírez Vélez, J. C.; Alecian, E.; Brown, C. J.; Carter, B. D.; Donati, J.-F.; Dunstone, N. et al. (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. doi:10.1111/j.1365-2966.2011.18272.x. ISSN 0035-8711.
 |  |
