Planet Ross 458 (AB) c

Name Ross 458 (AB) c
Planet Status Confirmed
Discovered in 2010
Mass 11.3 ( -4.5 +4.5 ) MJ
Mass*sin(i)
Semi-Major Axis 1168.0 AU
Orbital Period
Eccentricity
ω
Tperi
Radius 1.07 ( -0.07 +0.07 ) RJ
Inclination
Update 2016-02-23
Detection Method Imaging
Mass Detection Method
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature 670.0 K
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH) 4.35
Alternate Names Ross 458C, WISEPC J130041.65+122114.6 , HIP 63510C

Star

Ross 458 (AB)
Name Ross 458 (AB)
Distance 11.7 (± 0.2) pc
Spectral type M0.5
Apparent magnitude V 9.76
Mass 0.6 (± 0.08) MSun
Age 0.475 (± 0.325) Gyr
Effective temperature
Radius
Metallicity [Fe/H] 0.0
Detected Disc
Magnetic Field
RA2000 13:00:47.0
Dec2000 +12:22:33
Alternate Names DT Virginis, HIP 63510, GI 494
Planetary system 1 planet

Remarks

Binary star. The secondary component has a M7.5 spectral type with mass 0.06-0.09 Msun. The two red dwarfs are separated by 5 AU and orbit with a period of 14.5 yr.

More data

Atmospheric parameters

Temperatures

Data Source Type Result Value Result Figure Notes Reference

Molecules

Molecule Data Source Type Result Value Result Figure Notes Reference
CH4 Measurements Detected None 2010 - BURGASSER A.
H2 Measurements Detected None 2010 - BURGASSER A.
H2O Measurements Detected None 2010 - BURGASSER A.
K Measurements Detected None 2010 - BURGASSER A.

Observability Predictor

Remarks

Note: the values of radius, mass, log(g) and effective temperature are given by the average of the results of Dupuy & Kraus (2013) computed for the ages of 180 and 800 Myr. The error is simply the deviation between the two values (the deviation is 20K for the effective temperature and 0.25 for log(g) ).

Note: there is agreement that the spectrum is best reproduced by models with clouds. Morley et al. (2012) propose sulfite clouds with fsed=3, expected in T dwarfs conditions.

(Burningham et al. 2011): spectral type T8.5p±0.5 (where p stands for peculiarity, in this case an unusually enhanved K band flux).


Related publications

Cloud Atlas: Rotational Spectral Modulations and potential Sulfide Clouds in the Planetary-mass, Late T-type Companion Ross 458C
2019 MANJAVACAS E., APAI D., LEW B., ZHOU Y., SCHNEIDER G. et al.
ApJ. Letters, 875, L15
paper  arxiv  

Imaging Extrasolar Giant Planets
2016 BOWLER B.
PASP, 128, 102001
paper  arxiv  ADS  

The Brown-dwarf Atmosphere Monitoring (BAM) Project II: Multi-epoch monitoring of extremely cool brown dwarfs
2015 RAJAN A., PATIENCE J., WILSON P., BULGER J., DE ROSA R. & 4 co-authors
MNRAS, 448, 3775
paper   arxiv   ADS  

Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs
2014 METCHEV S., HEINZE A., APAI D., FLATEAU D., RADIGAN J. et 5 co-authors
ApJ, 799, 154
paper  arxiv   ADS  

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects
2013 DUPUY T. & KRAUS A.
Science, 341, 1492
paper   arxiv   ADS  

76 T dwarfs from the UKIDSS LAS: benchmarks, kinematics and an updated space density
2013 BURNINGHAM B., CARDOSO C., SMITH L., LEGGETT S., SMART R. & 32 co-authors
MNRAS, 433, 457
paper   arxiv   ADS  

Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function
2012 KIRKPATRICK J., GELINO C., CUSHING M., MACE G., GRIFFITH R. & 10 additional authors
ApJ, 753, 156
paper   arxiv   ADS  

Direct Imaging of Extra-solar Planets - Homogeneous Comparison of Detected Planets and Candidates
2012 NEUHAUSER R. & SCHMIDT T.
in "Topics in Adaptive Optics", Chap 3
Full text  arxiv   ADS  

The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs
2012 FAHERTY J., BURGASSER A., WALTER F., VAN DER BLIEK N., SHARA M. & 4 co-authors
ApJ, 752, 56
paper   arxiv   ADS  

The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition
2012 DUPUY T. & LIU M.
ApJ Suppl., 201, 19
paper   arxiv   ADS  

Neglected Clouds in T and Y Dwarf Atmospheres
2012 MORLEY C., FORTNEY J., MARKEY M., VISSCHER C., SAUMON D. & LEGGETT S.
ApJ, 756, 172
paper   arxiv   ADS  

The properties of the T8.5p dwarf Ross 458C
2011 BURNINGHAM B., LEGGET S., HOMEIER D., SAUMON D., LUCAS P. & 10 additional authors
MNRAS, 414, 3590
paper   arxiv   ADS  

A Search for High Proper Motion T Dwarfs with PAN-STARRS1 + 2MASS + WISE
2011 LIU M., DEACON N., MAGNIER E., DUPUY T., ALLER K. & 12 co-authors
ApJ Letters, 70, L32
paper   arxiv   ADS  

Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data
2011 SCHOLZ R.-D., BIHAIN G., SCHNURR O. & STORM J.
Astron. Astrophys, 532, L5
paper   arxiv   ADS  

The Ultra Cool Brown Dwarf Companion of WD 0806-661B: Age, Mass, and Formation Mechanism
2011 RODRIGUEZ D., ZUCKERMAN B., MELIS C. & SONG I.
ApJ. Letters, 732, L29
paper   arxiv   ADS  

A new benchmark T8-9 brown dwarf and a couple of new mid-T dwarfs from the UKIDSS DR5+ LAS
2010 GOLDMAN B., MARSAT S., HENNING Th., CLEMENS C. & GREINER J.
MNRAS, 404, 1140
paper   arxiv   ADS  

Clouds in the Coldest Brown Dwarfs: Fire Spectroscopy of Ross 458C
2010 BURGASSER A., SIMCOE R., BOCHANSKI J., SAUMON D., MAMAJEK E. & 5 additional authors
ApJ., 725, 1045
paper   arxiv   ADS