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Title: A 3$π$ Search for Planet Nine at 3.4 $μ$m with WISE and NEOWISE

Abstract

The recent "Planet Nine" hypothesis has led to many observational and archival searches for this giant planet proposed to orbit the Sun at hundreds of astronomical units. While trans-Neptunian object searches are typically conducted in the optical, models suggest Planet Nine could be self-luminous and potentially bright enough at ~3–5 μm to be detected by the Wide-field Infrared Survey Explorer (WISE). We have previously demonstrated a Planet Nine search methodology based on time-resolved WISE coadds, allowing us to detect moving objects much fainter than would be possible using single-frame extractions. In the present work, we extend our 3.4 μm (W1) search to cover more than three-quarters of the sky and incorporate four years of WISE observations spanning a seven-year time period. This represents the deepest and widest-area WISE search for Planet Nine to date. We characterize the spatial variation of our survey's sensitivity and rule out the presence of Planet Nine in the parameter space searched at W1 < 16.7 in high Galactic latitude regions (90% completeness).

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Berkeley Center for Cosmological Physics
  2. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
  3. Smithsonian Astrophysical Observatory, Cambridge, MA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1524088
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Astronomical Journal (Online)
Additional Journal Information:
Journal Name: Astronomical Journal (Online); Journal Volume: 155; Journal Issue: 4; Journal ID: ISSN 1538-3881
Publisher:
IOP Publishing - AAAS
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Meisner, A. M., Bromley, B. C., Kenyon, S. J., and Anderson, T. E. A 3$π$ Search for Planet Nine at 3.4 $μ$m with WISE and NEOWISE. United States: N. p., 2018. Web. doi:10.3847/1538-3881/aaae70.
Meisner, A. M., Bromley, B. C., Kenyon, S. J., & Anderson, T. E. A 3$π$ Search for Planet Nine at 3.4 $μ$m with WISE and NEOWISE. United States. doi:10.3847/1538-3881/aaae70.
Meisner, A. M., Bromley, B. C., Kenyon, S. J., and Anderson, T. E. Wed . "A 3$π$ Search for Planet Nine at 3.4 $μ$m with WISE and NEOWISE". United States. doi:10.3847/1538-3881/aaae70. https://www.osti.gov/servlets/purl/1524088.
@article{osti_1524088,
title = {A 3$π$ Search for Planet Nine at 3.4 $μ$m with WISE and NEOWISE},
author = {Meisner, A. M. and Bromley, B. C. and Kenyon, S. J. and Anderson, T. E.},
abstractNote = {The recent "Planet Nine" hypothesis has led to many observational and archival searches for this giant planet proposed to orbit the Sun at hundreds of astronomical units. While trans-Neptunian object searches are typically conducted in the optical, models suggest Planet Nine could be self-luminous and potentially bright enough at ~3–5 μm to be detected by the Wide-field Infrared Survey Explorer (WISE). We have previously demonstrated a Planet Nine search methodology based on time-resolved WISE coadds, allowing us to detect moving objects much fainter than would be possible using single-frame extractions. In the present work, we extend our 3.4 μm (W1) search to cover more than three-quarters of the sky and incorporate four years of WISE observations spanning a seven-year time period. This represents the deepest and widest-area WISE search for Planet Nine to date. We characterize the spatial variation of our survey's sensitivity and rule out the presence of Planet Nine in the parameter space searched at W1 < 16.7 in high Galactic latitude regions (90% completeness).},
doi = {10.3847/1538-3881/aaae70},
journal = {Astronomical Journal (Online)},
number = 4,
volume = 155,
place = {United States},
year = {2018},
month = {3}
}

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