Notes for Epsilon Eridani

Alias HD 22049

update: 5 February 2005

The planet(s):

Detection method: Radial velocity and astrometry

Basic data:

Name:	epsilon Eridani b	epsilon Eridani c??
M.sini:	0.86 M_J	0.1 M_J??
Semi-major axis:	3.3 AU	40 AU??
Orbital period:	2502.1 ± 20.1 d.	280 yr.??
Eccentricity:	0.608 ± 0.041	0.3??
Omega (deg):	34
T_peri (JD-2450000):	-869.74
Inclination:	-

Remarks:
20 oct. 2002: The hypothetical planet epsilon Eridani c is suspected from the dust ring morphology (Quillen & Thorndike 2002)
2001: Marcy et al. claim that " The Doppler behavior of magnetically active stars remains poorly explored, because so few stars are as active as Epsilon Eridani. Thus, Campbell's interpretation of a planet remains controversial. "
References:
1. BENEDICT F., McARTHUR E., HATZES A., NELAN E., COCHRAN W., GATEWOOD G., MARCY G., BUTLER P. & McGRATH M., 2003
  HST Fine Guidance Sensor Astrometry of the Extrasolar Planet Candidates \epsilon Eri and \upsilon And - A Progress Report.
  BAAS, 35, issue 4, N. 7.10
  abstract
2. BENEDICT F., McARTHUR B. & he Are There Planets or Not? Team, 2004
  A Mass for the Extrasolar Planet \epsilon Eri b.
  BAAS, 36 No. 4, #41.02
  abstract
3. BURROWS A., SUDARSKY D. & HUBENY I., 2004
  Spectra and Diagnostics for the Direct Detection of Wide-Separation Extrasolar Giant Planets.
  ApJ. , submitted
  preprint
4. CAMPBELL B., WALKER G. & YANG S., 1988
  A search for substellar companions to solar-type stars.
  ApJ., 331, 902
  abstract
5. DAS S. & BACKMAN D., 1992
  Epsilon Eridani's Planetary Companion and Circumstellar Dust.
  BAAS, 24, 1228
  abstract
6. DELLER A. & MADDISON S., 2005
  Numerical Modelling of Dusty Debris Disks.
  ApJ, accepted
  preprint
7. GATEWOOD G., 2000
  The Actual Mass of the Object Orbiting Epsilon Eridani.
  BAAS, 32, 32.01
  abstract
8. GREAVES J., HOLLAND W. WYATT M ., DENT W., ROBSON E., COULSON I., JENNESS T., MORIARTY-SCHIEVEN G., DAVIS G., BUTNER H., GEAR W., DOMINIK C. & WALKER H., 2004
  Structure in the \epsilon Eridani Debris Disk.
  ApJ. Letters, February 1
  paper
9. GREAVES J., HOLLAND W., MORIARTY-SCHIVEN G., DENT W. ZUCKERMAN B., McCARTHY Ch., WEBB R., H.M. BUTNER H., GEAR W. & WALKER H., 1998a
  A dust ring around Epsilon Eridani : analogue to the young Solar System
  ApJ.L., 506, L133
  paper
10. GREAVES J., HOLLAND W., JAYAWARDHANA R.,DENT W., WYATT M ., 2004
  A search for debris discs around stars with giant planets.
  MNRAS, 348, 1078
  paper
11. GREENHILL L., 2002
  epsilon ERIDANI, upsilon ANDROMEDAE, 51 PEGASI, HD 209458, HD 196050.
  IAU Circular, No. 7985
  full text
12. HATZES A., COCHRAN W., McARTHUR B., BALIUNAS S., WALKER G., CAMPBELL B., IRWIN A., YANG S., KUERSTER M., ENDL M., ELS S., BUTLER P. & MARCY G., 2000
  Evidence for a Long-period Planet Orbiting Epsilon Eridani.
  ApJ. Letters, 544, L145
  paper
13. JONES B. & SLEEP P., 2002a
  The Orbits of Terrestrial Planets in the Habitable Zones of Known Exoplanetary Systems.
  in Scientific Frontiers in Research on Extrasolar Planets, edited by Deming and Seager. ASP Conference Series.
  paper
14. LAWS Ch., GONZALEZ G., WALKER K., TYAGI S., DODSWORTH J., SNIDER K. & SUNTZEFF N., 2003
  Parent Stars of Extrasolar Planets VII: New Abundance Analyses of 30 Systems.
  Astron. J., accepted
  preprint
15. LAWTON A. & WRIGHT P., 1990
  The search for companions to epsilon Eridani.
  JBIS, 43, 556
16. LI A., LUNINE J. & BENDO G., 2003a
  Modeling the Infrared Emission from the \epsilon Eridani Disk.
  ApJ. Letters, accepted
  paper
17. MACINTOSH B., BECKLIN E., KAISLER D., KONOPACKY Q. & ZUCKERMAN B., 2003
  Deep Keck adaptive optics searches for extrasolar planets in the dust of Epsilon Eridani and Vega.
  ApJ., submitted
  preprint
18. MADDISON S., GINO M., MUNRO A. & HINDS P., 2004
  A Search for Potential Habitable Planets in Multiple Planet Systems.
  BAAS, 36, No2, #62.03
  abstract
20. MORAN S., KUCHNER M. & HOLMAN M., 2004
  The Dynamical Influence of a Planet at Semimajor Axis 3.4 AU on the Dust Around Epsilon Eridani.
  ApJ., 612, 1163
  paper
21. QUILLEN A. & THORNDIKE S., 2002b
  Structure in the Epsilon Eridani dusty disk caused by mean motion resonances with a 0.3 eccentricity planet at periastron.
  ApJ. Letters, 578, L149
  paper
22. MARENGO M., MEGEATH T., FAZIO G., BACKMAN D., STAPPELFELDT K., WARNER M., BEICHMAN C., SU K., STANSBERRY J., RIEKE G. & HINES D., 2004
  A Search for Substellar Companions of the Debris Disk Star \epsilon Eridani with the Spitzer Space Telescope.
  BAAS, 36, No.5 #11.05 abstract PROFFITT C., SAHU K., LIVIO M., KRIST J., CALZETTI D., GILLILAND R., GRADY C., LINDLER D., WOODGATE B., HEAP S., CLAMPIN M., GULL Th. a LISSE C., 2004
  Limits on the Optical Brightness of the Epsilon Eridani Dust Ring.
  ApJ, submitted
23. SCHÜTZ O., NIELBOCK M., WOLF S., HENNING Th. & ELS S., 2004
  SIMBA's view of the ε Eri disk.
  Astron. & Astrophys., 414, L9
  paper
24. TAKEDA Y., SATO B., KAMBE E., AOKI W., HONDA S., KAWANOMOTO S., MASUDA S., IZUMIURA H., WATANABE E., KOYANO H., MAEHARA H., NORIMOTO Y., OKADA T., SHIMIZU Y., URAGUCHI F., YANAGIZAWA K. YOSHIDA M., NIYAMA S. & ANDO H., 2001
  Photospheric Abundances of Volatile and Refractory Elements in Planet-Harboring Stars.
  PASJ, 53, 1211
  paper
25. WILNER D., DOWELL C., HOLMAN M. & KUCHNER M., 2003
  The Debris Disk around \epsilon Eridani at 350 microns.
  BAAS, 35 Nr.5, #130.03
  abstract
26. ZHAO G., CHEN Y., QIU H. & LI. Z., 2002
  Chemical Abundances of 15 Extrasolar-Planet Host Stars.
  Astron. J., 124, 2224
  paper
Other Web pages:
1. Lick RV curve and comments by Marcy et al.
2. Hatzes et al. RV curve
3. A dust ring around epsilon Eridani (Greaves et al)

The star:

Distance: 3.2 pc
Spectral type: K2V
Apparent magnitude: V = 3.73
Metallicity: [Fe/H]= -0.1
Mass (M_sun): M= 0.8
Coordinates (2000): RA = 03 32 55.8442 DEC = -09 27 29.744
More data:
- Basic Data (from simbad )
- Most recent refs. (from ADS; enter ` HD 22049 ' in the `objects' field)

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