%0 Generic %1 nielsen2019gemini %A Nielsen, Eric L. %A De Rosa, Robert J. %A Macintosh, Bruce %A Wang, Jason J. %A Ruffio, Jean-Baptiste %A Chiang, Eugene %A Marley, Mark S. %A Saumon, Didier %A Savransky, Dmitry %A Ammons, S. Mark %A Bailey, Vanessa P. %A Barman, Travis %A Blain, Celia %A Bulger, Joanna %A Chilcote, Jeffrey %A Cotten, Tara %A Czekala, Ian %A Doyon, Rene %A Duchene, Gaspard %A Esposito, Thomas M. %A Fabrycky, Daniel %A Fitzgerald, Michael P. %A Follette, Katherine B. %A Fortney, Jonathan J. %A Gerard, Benjamin L. %A Goodsell, Stephen J. %A Graham, James R. %A Greenbaum, Alexandra Z. %A Hibon, Pascale %A Hinkley, Sasha %A Hirsch, Lea A. %A Hom, Justin %A Hung, Li-Wei %A Dawson, Rebekah Ilene %A Ingraham, Patrick %A Kalas, Paul %A Konopacky, Quinn %A Larkin, James E. %A Lee, Eve J. %A Lin, Jonathan W. %A Maire, Jerome %A Marchis, Franck %A Marois, Christian %A Metchev, Stanimir %A Millar-Blanchaer, Maxwell A. %A Morzinski, Katie M. %A Oppenheimer, Rebecca %A Palmer, David %A Patience, Jennifer %A Perrin, Marshall %A Poyneer, Lisa %A Pueyo, Laurent %A Rafikov, Roman R. %A Rajan, Abhijith %A Rameau, Julien %A Rantakyro, Fredrik T. %A Ren, Bin %A Schneider, Adam C. %A Sivaramakrishnan, Anand %A Song, Inseok %A Soummer, Remi %A Tallis, Melisa %A Thomas, Sandrine %A Ward-Duong, Kimberly %A Wolff, Schuyler %D 2019 %K bdwarf exoplanet multiplicity %T The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU %U http://arxiv.org/abs/1904.05358 %X We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey (GPIES). This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the underlying distributions of substellar companions with respect to their mass, semi-major axis, and host stellar mass. We uncover a strong correlation between planet occurrence rate and host star mass, with stars M $>$ 1.5 $M_ødot$ more likely to host planets with masses between 2-13 M$_Jup$ and semi-major axes of 3-100 au at 99.92% confidence. We fit a double power-law model in planet mass (m) and semi-major axis (a) for planet populations around high-mass stars (M $>$ 1.5M$_ødot$) of the form $d^2 Ndm da m^a^\beta$, finding $\alpha$ = -2.4 $\pm$ 0.8 and $\beta$ = -2.0 $\pm$ 0.5, and an integrated occurrence rate of $9^+5_-4$% between 5-13 M$_Jup$ and 10-100 au. A significantly lower occurrence rate is obtained for brown dwarfs around all stars, with 0.8$^+0.8_-0.5$% of stars hosting a brown dwarf companion between 13-80 M$_Jup$ and 10-100 au. Brown dwarfs also appear to be distributed differently in mass and semi-major axis compared to giant planets; whereas giant planets follow a bottom-heavy mass distribution and favor smaller semi-major axes, brown dwarfs exhibit just the opposite behaviors. Comparing to studies of short-period giant planets from the RV method, our results are consistent with a peak in occurrence of giant planets between ~1-10 au. We discuss how these trends, including the preference of giant planets for high-mass host stars, point to formation of giant planets by core/pebble accretion, and formation of brown dwarfs by gravitational instability.

@misc{nielsen2019gemini, abstract = {We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey (GPIES). This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the underlying distributions of substellar companions with respect to their mass, semi-major axis, and host stellar mass. We uncover a strong correlation between planet occurrence rate and host star mass, with stars M $>$ 1.5 $M_\odot$ more likely to host planets with masses between 2-13 M$_{\rm Jup}$ and semi-major axes of 3-100 au at 99.92% confidence. We fit a double power-law model in planet mass (m) and semi-major axis (a) for planet populations around high-mass stars (M $>$ 1.5M$_\odot$) of the form $\frac{d^2 N}{dm da} \propto m^\alpha a^\beta$, finding $\alpha$ = -2.4 $\pm$ 0.8 and $\beta$ = -2.0 $\pm$ 0.5, and an integrated occurrence rate of $9^{+5}_{-4}$% between 5-13 M$_{\rm Jup}$ and 10-100 au. A significantly lower occurrence rate is obtained for brown dwarfs around all stars, with 0.8$^{+0.8}_{-0.5}$% of stars hosting a brown dwarf companion between 13-80 M$_{\rm Jup}$ and 10-100 au. Brown dwarfs also appear to be distributed differently in mass and semi-major axis compared to giant planets; whereas giant planets follow a bottom-heavy mass distribution and favor smaller semi-major axes, brown dwarfs exhibit just the opposite behaviors. Comparing to studies of short-period giant planets from the RV method, our results are consistent with a peak in occurrence of giant planets between ~1-10 au. We discuss how these trends, including the preference of giant planets for high-mass host stars, point to formation of giant planets by core/pebble accretion, and formation of brown dwarfs by gravitational instability.}, added-at = {2019-04-13T21:38:23.000+0200}, author = {Nielsen, Eric L. and De Rosa, Robert J. and Macintosh, Bruce and Wang, Jason J. and Ruffio, Jean-Baptiste and Chiang, Eugene and Marley, Mark S. and Saumon, Didier and Savransky, Dmitry and Ammons, S. Mark and Bailey, Vanessa P. and Barman, Travis and Blain, Celia and Bulger, Joanna and Chilcote, Jeffrey and Cotten, Tara and Czekala, Ian and Doyon, Rene and Duchene, Gaspard and Esposito, Thomas M. and Fabrycky, Daniel and Fitzgerald, Michael P. and Follette, Katherine B. and Fortney, Jonathan J. and Gerard, Benjamin L. and Goodsell, Stephen J. and Graham, James R. and Greenbaum, Alexandra Z. and Hibon, Pascale and Hinkley, Sasha and Hirsch, Lea A. and Hom, Justin and Hung, Li-Wei and Dawson, Rebekah Ilene and Ingraham, Patrick and Kalas, Paul and Konopacky, Quinn and Larkin, James E. and Lee, Eve J. and Lin, Jonathan W. and Maire, Jerome and Marchis, Franck and Marois, Christian and Metchev, Stanimir and Millar-Blanchaer, Maxwell A. and Morzinski, Katie M. and Oppenheimer, Rebecca and Palmer, David and Patience, Jennifer and Perrin, Marshall and Poyneer, Lisa and Pueyo, Laurent and Rafikov, Roman R. and Rajan, Abhijith and Rameau, Julien and Rantakyro, Fredrik T. and Ren, Bin and Schneider, Adam C. and Sivaramakrishnan, Anand and Song, Inseok and Soummer, Remi and Tallis, Melisa and Thomas, Sandrine and Ward-Duong, Kimberly and Wolff, Schuyler}, biburl = {https://www.bibsonomy.org/bibtex/2eab3e37872512a10b320b67bcb43881b/superjenwinters}, description = {The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU}, interhash = {2ffaf8e0212791cd2fee73e1f5d79e4b}, intrahash = {eab3e37872512a10b320b67bcb43881b}, keywords = {bdwarf exoplanet multiplicity}, note = {cite arxiv:1904.05358Comment: 52 pages, 18 figures. AJ in press}, timestamp = {2019-04-13T21:38:23.000+0200}, title = {The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU}, url = {http://arxiv.org/abs/1904.05358}, year = 2019 }