Planet HQ Tau Ab

Detailed information about planet HQ Tau Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HQ Tau Ab

Mass

—

Mass*sin(i)

50.1 (\begin{matrix} + 29.6 \\ - 32.0 \end{matrix})

M_J 1 publication

Unraveling the binary nature of HQ Tau: A brown dwarf companion revealed using multi-variate Gaussian process

Semi-Major Axis

0.61 (\begin{matrix} + 0.13 \\ - 0.24 \end{matrix})

Orbital Period

125.8 (\begin{matrix} + 31.5 \\ - 55.2 \end{matrix})

day 1 publication

Unraveling the binary nature of HQ Tau: A brown dwarf companion revealed using multi-variate Gaussian process

Eccentricity

—

ω

—

T_peri

—

Radius

— 1 publication

Unraveling the binary nature of HQ Tau: A brown dwarf companion revealed using multi-variate Gaussian process

Inclination

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

1250.0 (\begin{matrix} + 830.0 \\ - 710.0 \end{matrix})

m/s 1 publication

Unraveling the binary nature of HQ Tau: A brown dwarf companion revealed using multi-variate Gaussian process

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Surface gravity log(g/g_H)

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Long et al. (2019) highlight dust depletion towards the inner disc region of HQ Tau, indicating the presence of a dust cavity. Assuming this cavity being produced by a companion, this means that the orbit inclination matches with the disc inclination (i.e. 53.8°), constraining the companion’s mass to about 62 M_Jup.

No link

Star

Name

HQ Tau A

Distance

162.54 (\pm 5.08)

pc 1 publication

Resolved Young Binary Systems and Their Disks

Spectral type

K2.0

Apparent magnitude V

12.02

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.78 M_Sun 1 publication

Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud

Age

0.001 (\begin{matrix} + 0.0006 \\ - 0.0004 \end{matrix})

Gyr 1 publication

Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud

Effective temperature

4900.0 K 1 publication

Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud

Radius

—

Metallicity [Fe/H]

0.01 1 publication

Stellar Properties for a Comprehensive Collection of Star-forming Regions in the SDSS APOGEE-2 Survey

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

04:35:47.3

Dec₂₀₀₀

+22:50:21.7

Alternate Names

—

Joncour et al. (2017): HQ Tau would form a triple or quadruple system with protostar XEST08-049 and proto-brown dwarf KPNO-Tau 9 located 11,884 and 12,571 AUs away respectively. Given the distances, the latter companion would likely orbit the former about 690 AUs away.
Long et al. (2019): Estimated luminosity for HQ Tau A is 4.34 L_Sol.
Pouilly et al. (2024): HQ Tau likely forms a binary system with an M dwarf companion star (m = 0.465 Solar masses) in close orbit (P ∼ 767 d).