TEPCat: TrES-4


 

This page summarises the information held within TEPCat for the transiting planetary system TrES-4. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007ApJ...667L.195M  
Date of discovery paper 2007 / 6 / 18 y / m / d
Right ascension 17 53 13.06 h m s
Declination +37 12 42.4 d m s
V-band apparent magnitude 11.59 mag
K-band apparent magnitude 10.33 mag
Transit duration 0.1524
( 3.658 )
day
hour
Transit depth 1.1 %
Time of mid-transit   2454230.90560 ± 0.00030     HJD or BJD
Orbital period 3.55392771 ± 0.00000047 days
Reference for orbital ephemeris   2015A+A...575L..15S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6295 ± 65 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.28 ± 0.09 dex
Stellar mass 1.45 ± 0.05   Msun
Stellar radius 1.831 ± 0.08 Rsun
Stellar logarithmic surface gravity 4.09 ± 0.03 c.g.s.
Stellar mean density 0.246 +0.030 −0.022
( 0.347 +0.042 −0.031 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.016 −0.0  
Orbital semimajor axis   0.0516 ± 0.0005  AU
Planetary mass 0.494 ± 0.035
( 157 ± 11 )
Mjup
Mearth
Planetary radius 1.838 +0.081 −0.090
( 20.60 + 0.91 − 1.01 )
Rjup
Rearth
Planetary surface gravity 2.82 +0.34 −0.31
2.45 +0.05 −0.05
m/s2
log(cgs)
Planetary mean density 0.075 +0.012 −0.010
( 0.099 +0.016 −0.013 )
ρjup
g cm-3
Planetary equilibrium temperature 1795 +35 −39 K
Reference of detailed study 2015A+A...575L..15S  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Narita et al. (2010)   6.3   ±   4.7  

 

 

TrES-4 has been examined as part of the Homogeneous Studies of Transiting Extrasolar Planets project. The details from this work have been given below. In most instances they are the same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses. Separate statistical and systematic errorbars are given where relevant.

Measured parameters Value Unit
Orbital velocity amplitude 97.4 ± 7.2 m/s
Stellar effective temperature 6200 ± 75 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.14 ± 0.09 dex
Orbital inclination 82.33 ± 0.47   degrees
Fractional stellar radius (R* / a) 0.1697 ± 0.0064  
Fractional planetary radius (Rpl / a)   0.01650 ± 0.00059   
Light curve analysis reference 2012MNRAS.426.1291S  
 
Derived parameters Value Unit
Stellar mass 1.339 ± 0.084 ± 0.016 Msun
Stellar radius 1.834 ± 0.087 ± 0.007 Rsun
Stellar logarithmic surface gravity 4.038 ± 0.033 ± 0.002 c.g.s.
Stellar mean density 0.217 ± 0.025 ρsun
Orbital semimajor axis   0.0502 ± 0.0010 ± 0.0002  AU
Planetary mass 0.897 ± 0.075 ± 0.007 Mjup
Planetary radius 1.735 ± 0.072 ± 0.007 Rjup
Planetary surface gravity 7.39 ± 0.76 m/s2
Planetary mean density 0.161 ± 0.021 ± 0.001 ρjup
Planetary equilibrium temperature 1805 ± 40 K
Safronov number 0.0387 ± 0.0033 ± 0.0002  
Main analysis reference 2012MNRAS.426.1291S  

 


Page generated on 2017/12/15           John Southworth   (Keele University, UK)