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Title: Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager

Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric compositions and luminosities, which are influenced by their formation mechanisms. Using the Gemini Planet Imager, we discovered a planet orbiting the ~20-million-year-old star 51 Eridani at a projected separation of 13 astronomical units. Near-infrared observations show a spectrum with strong methane and water-vapor absorption. Modeling of the spectra and photometry yields a luminosity (normalized by the luminosity of the Sun) of 1.6 to 4.0 × 10–6 and an effective temperature of 600 to 750 kelvin. For this age and luminosity, “hot-start” formation models indicate a mass twice that of Jupiter. As a result, this planet also has a sufficiently low luminosity to be consistent with the “cold-start” core-accretion process that may have formed Jupiter.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [2] ;  [9] ;  [12] ;  [13] ;  [10] ;  [2] ;  [14] ;  [15] more »;  [16] ;  [17] ;  [18] ;  [8] ;  [2] ;  [19] ;  [2] ;  [2] ;  [10] ;  [20] ;  [21] ;  [13] ;  [22] ;  [13] ;  [23] ;  [24] ;  [20] ;  [25] ;  [26] ;  [27] ;  [28] ;  [29] ;  [13] ;  [30] ;  [20] ;  [31] ;  [10] ;  [13] ;  [29] ;  [24] ;  [8] ;  [19] ;  [14] ;  [20] ;  [24] ;  [32] ;  [19] ;  [2] ;  [24] ;  [3] ;  [33] ;  [34] ;  [12] ;  [35] ;  [8] ;  [12] ;  [18] ;  [27] ;  [36] ;  [37] ;  [24] ;  [38] ;  [37] ;  [39] ;  [40] ;  [2] ;  [41] ;  [42] ;  [8] ;  [29] ;  [8] ;  [30] ;  [43] ;  [43] ;  [9] ;  [24] ;  [26] ;  [13] « less
  1. Stanford Univ., Stanford, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Univ. of Arizona, Tucson, AZ (United States)
  4. Univ. of California, San Diego, CA (United States)
  5. NASA Ames Research Center, Moffett Field, CA (United States)
  6. National Research Council of Canada, Herzberg Institute of Astrophysics, Victoria, BC (Canada); Univ. of Victoria, Victoria, BC (Canada)
  7. Search for Extraterrestrial Intelligence Institute, Mountain View, CA (United States); Stanford Univ., Stanford, CA (United States)
  8. Space Telescope Science Institute, Baltimore, MD (United States)
  9. Arizona State Univ., Tempe, AZ (United States)
  10. Univ. de Montreal, Montreal, QC (Canada)
  11. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  12. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  13. Univ. of California, Los Angeles, CA (United States)
  14. Search for Extraterrestrial Intelligence Institute, Mountain View, CA (United States)
  15. The Univ. of Western Ontario, London, ON (Canada)
  16. Arizona State Univ., Tempe, AZ (United States); Subaru Telescope, Hilo, HI (United States)
  17. NASA Ames Research Center, Moffett Field, CA (United States); Univ. of Herfordshire, Hatfield (United Kingdom)
  18. Princeton Univ., Princeton, NJ (United States)
  19. Univ. of Toronto, Toronto, ON (Canada)
  20. Univ. of Victoria, Victoria, BC (Canada); National Research Council of Canada, Herzberg Institute of Astrophysics, Victoria, BC (Canada)
  21. Univ. of California, Berkeley, CA (United States); Univ. Grenoble Alpes, Grenoble (France)
  22. Univ. of Chicago, Chicago, IL (United States)
  23. Stanford Univ., Stanford, CA (United States)
  24. Univ. of California, Santa Cruz, CA (United States)
  25. Durham Univ., Durham (United Kingdom); Gemini Observatory, La Serena (Chile)
  26. Johns Hopkins Univ., Baltimore, MD (United States); Space Telescope Science Institute, Baltimore, MD (United States)
  27. Gemini Observatory, La Serena (Chile)
  28. Univ. of Exeter, Exeter (United Kingdom)
  29. Univ. of Georgia, Athens, GA (United States)
  30. Large Synoptic Survey Telescope, Tucson, AZ (United States)
  31. Univ. of California, Berkeley, CA (United States); Search for Extraterrestrial Intelligence Institute, Mountain View, CA (United States)
  32. The Univ. of Western Ontario, London, ON (Canada); Stony Brook Univ., Stony Brook, NY (United States)
  33. Univ. of California, Santa Barbara, CA (United States)
  34. American Museum of Natural History, New York, NY (United States)
  35. Stony Brook Univ., Stony Brook, NY (United States)
  36. College of Staten Island, City Univ. of New York, Staten Island, NY (United States); American Museum of Natural History, New York, NY (United States)
  37. Univ. de Chile, Santiago (Chile)
  38. Stanford Univ., Stanford, CA (United States); Search for Extraterrestrial Intelligence Institute, Mountain View, CA (United States)
  39. Univ. Space Research Assoc., NASA/Armstrong Flight Research Center, Palmdale, CA (United States); Gemini Observatory, La Serena (Chile)
  40. National Research Council of Canada, Herzberg Institute of Astrophysics, Victoria, BC (Canada)
  41. Cornell Univ., Ithaca, NY (United States)
  42. Univ. of Toledo, Toledo, OH (United States)
  43. California Inst. of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
OSTI Identifier:
1258658
Report Number(s):
LA-UR--15-24933
Journal ID: ISSN 0036-8075
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 350; Journal Issue: 6256; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS