HD 97048
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 8.38 - 8.48[2] |
| Characteristics | |
| Evolutionary stage | Herbig Ae/Be[3] |
| Spectral type | A0Vep[4] |
| Variable type | INA[2] |
| Astrometry | |
| Radial velocity (Rv) | 34.00±2.5[5] km/s |
| Proper motion (μ) | RA: Script error: No such module "val".[1] mas/yr Dec.: Script error: No such module "val".[1] mas/yr |
| Parallax (π) | 5.4105±0.0388 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +2.47[6] |
| Details | |
| Mass | 2.5[3] Template:Solar mass |
| Radius | 1.7[7] Template:Solar radius |
| Luminosity | 33[7] Template:Solar luminosity |
| Surface gravity (log g) | 4.30[7] cgs |
| Temperature | 10,500[7] K |
| Age | 3[3] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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HD 97048 or CU Chamaeleontis is a Herbig Ae/Be star Script error: No such module "val". away in the constellation Chamaeleon. It is a variable star embedded in a dust cloud containing a stellar nursery, and is itself surrounded by a dust disk.
HD 97048 is a young star still contracting towards the main sequence. Its brightness varies between magnitudes 8.38 and 8.48 and it is classified as an Orion variable.[2] It was given the variable star designation CU Chamaeleontis in 1981.[9] Its spectrum is also variable. The spectral class is usually given as A0 or B9, sometimes with a giant luminosity class, sometimes main sequence. The spectrum shows strong variable emission lines indicative of a shell surrounding the star.[10]
HD 97048 is a member of the Chamaeleon T1 stellar association and is still embedded within the dark molecular cloud that it is forming from. It illuminates a small reflection nebula against the dark cloud.[11]
Planetary system
This star has a substantial dust disk having a central cavity with a 40−46 AU radius[3] The disk has a carbon monoxide gas velocity kink and intensity gap at 130 AUs, which is suspected to be caused by a superjovian planet.[12] In 2019, HCO+ ion and Hydrogen cyanide emission was detected from the disk, suggesting a large amount of gas is orbiting beyond 200 AU radius.[13]
In the system a kink in the velocity of carbon monoxide gas (CO 3–2) as well as a gap in the dust emission of the disk are seen as evidence for a jovian protoplanet. The protoplanet is located at 130 au from the star and has a mass of about 2.5 Jupiter masses. It is one of the lowest mass protoplanets discovered as of 2023.[14]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet disk
|- | b | Script error: No such module "val". [[Jupiter mass|Template:MvarJ]] | 130 | — | — | 40° | — |- |}Script error: No such module "Check for unknown parameters".
References
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