Notes for HD 41004 A

update: 15 August 2004

The planet(s):

• Detection method: Radial velocity
• Basic data:

  Name:	HD 41004 A b
  M.sini:	2.3 MJ
  Semi-major axis:	1.31 AU
  Orbital period:	655 ± 37 d.
  Eccentricity:	0.39 ± 0.17
  omega (deg):	114 ± 10
  T_peri (JD-2400000):	51914 ± 14
  Inclination:	-

• Remarks:
  1 July: Planet in a hierarchic quadruple system: A 2.3 M_Jup planet orbiting a K2V star plus a 19 M_Jup brown dwarf orbiting a M4V star
• References:
  1. SANTOS N., MAYOR M., NAEF D., PEPE F., QUELOZ D., UDRY S., BURNET M., CLAUSEN J., HELT B., OLSON E. & PRITCHARD J., 2002b
     The CORALIE survey for southern extra-solar planets IX. A 1.3-day period brown dwarf disguised as a planet.
     Astron. & Astrophys., 392, 215
     paper
  2. ZUCKER S. et al, 2003
     to be submitted
  3. ZUCKER S., MAZEH T., SANTOS N., UDRY S. & MAYOR M., 2003
     Multi-order TODCOR: application to observations taken with the CORALIE echelle spectrograph.
     Astron. & Astrophys., 404, 775
     paper
  4. ZUCKER S., MAZEH T., SANTOS N. UDRY S. & MAYOR M., 2004
     Multi-order TODCOR: Application to observations taken with the CORALIE echelle spectrograph II. A planet in the system HD41004.
     Astron. & Astrophys., in press
     preprint
• Other web pages:
  1. Data at Geneva Observatory

The star:

• Distance: 42.5 pc
• Spectral type: K1V
• Apparent magnitude: V = 8.65
• Coordinates (2000):     RA = 05 59 49.6493       DEC = -48 14 22.889
• Metallicity: [Fe/H] = -0.09 ± 0.10
• Mass (M_sun): M = 0.7
• Age (Gyr): A = 1.6
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter ` HD 41004 ' in the `objects' field)