V718 Persei is a young star in the constellation of Perseus, located in the young open cluster IC 348. The star has several designations derived from the cluster in which it belongs (H 187, TJ 108, HMW 15, LRL 35, NTC 5401, LNB 90—all require the prefix "IC 348"). The star shows hints of an occulting body of unclear nature, likely planetary.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 44m 39.241s |
| Declination | +32° 07′ 35.52″ |
| Apparent magnitude (V) | 15.82 |
| Characteristics | |
| Spectral type | K3V |
| Variable type | Eclipsing system[2] |
| Astrometry | |
| Distance | ≈1043 ly (≈320[1] pc) |
| Details | |
| Mass | 1.6[1] M☉ |
| Radius | ≈2.3 R☉ |
| Luminosity | 3.4[1] L☉ |
| Temperature | 5100-5350[1] K |
| Age | 5 million years |
| Other designations | |
| Database references | |
| SIMBAD | data |
A planetary system?
editIn 2008 Grinin et al. invoke the possible presence of a substellar object to explain peculiar and periodic eclipses occurring to the young star every 4.7 years.[1] The presence of a planetary object is still invoked in a recent research.[3] They infer a maximum mass of 6 times that of Jupiter for the perturbing object and an orbital separation of 3.3 astronomical units.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | ≤6 MJ | 3.3 | 1715.5 | 0 | — | — |
References
edit- ^ a b c d e f Grinin; Stempels, H. C.; Gahm, G. F.; Sergeev, S.; Arkharov, A.; Barsunova, O.; Tambovtseva, L. (2008). "The unusual pre-main-sequence star V718 Per (HMW 15)". Astronomy and Astrophysics. 489 (3): 1233–1238. arXiv:0808.1069. Bibcode:2008A&A...489.1233G. doi:10.1051/0004-6361:200810349. S2CID 59133715.
- ^ "V0718 Per". The International Variable Star Index. AAVSO. Retrieved 17 February 2022.
- ^ Herbst; et al. (2010). "The Light Curve of V713 Per (HMW 15): Evidence for Gravitational Sculpting by an Object Embedded in the Circumstellar Disk". American Astronomical Society, AAS Meeting#215,#429.31. 215: 429.31. Bibcode:2010AAS...21542931H.
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