Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 08m 03.3106s [1] |
Declination | −77° 39′ 17.4912″ [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: −22.437±0.061
[1]
mas/
yr Dec.: 1.305±0.059 [1] mas/ yr |
Parallax (π) | 5.4105 ± 0.0388 mas [1] |
Distance | 603 ± 4
ly (185 ± 1 pc) |
Absolute magnitude (MV) | +2.47 [6] |
Details | |
Mass | 2.5 [3] M☉ |
Radius | 1.7 [7] R☉ |
Luminosity | 33 [7] L☉ |
Surface gravity (log g) | 4.30 [7] cgs |
Temperature | 10,500 [7] K |
Age | 3 [3] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 97048 or CU Chamaeleontis is a Herbig Ae/Be star 603 ly 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]
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]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ([[]]s) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
protoplanetary disk | 40–850 AU | 40 ° | — | |||
b | 2.5±0.5 MJ | 130 | — | — | 40 ° | — |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 08m 03.3106s [1] |
Declination | −77° 39′ 17.4912″ [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: −22.437±0.061
[1]
mas/
yr Dec.: 1.305±0.059 [1] mas/ yr |
Parallax (π) | 5.4105 ± 0.0388 mas [1] |
Distance | 603 ± 4
ly (185 ± 1 pc) |
Absolute magnitude (MV) | +2.47 [6] |
Details | |
Mass | 2.5 [3] M☉ |
Radius | 1.7 [7] R☉ |
Luminosity | 33 [7] L☉ |
Surface gravity (log g) | 4.30 [7] cgs |
Temperature | 10,500 [7] K |
Age | 3 [3] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 97048 or CU Chamaeleontis is a Herbig Ae/Be star 603 ly 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]
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]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ([[]]s) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
protoplanetary disk | 40–850 AU | 40 ° | — | |||
b | 2.5±0.5 MJ | 130 | — | — | 40 ° | — |