Neowise observations of near-earth objects: Preliminary results

A. Mainzer, T. Grav, J. Bauer, J. Masiero, R. S. McMillan, R. M. Cutri, R. Walker, E. Wright, P. Eisenhardt, D. J. Tholen, T. Spahr, R. Jedicke, L. Denneau, E. Debaun, D. Elsbury, T. Gautier, S. Gomillion, E. Hand, W. Mo, J. WatkinsA. Wilkins, G. L. Bryngelson, A. Del Pino Molina, S. Desai, M. Gómez Camus, S. L. Hidalgo, I. Konstantopoulos, J. A. Larsen, C. Maleszewski, M. A. Malkan, J. C. Mauduit, B. L. Mullan, E. W. Olszewski, J. Pforr, A. Saro, J. V. Scotti, L. H. Wasserman

Resultado de la investigación: Article

194 Citas (Scopus)

Resumen

With the NEOWISE portion of the Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 μm, allowing us to refine estimates of their numbers, sizes, and albedos. The NEOWISE survey detected NEOs the same way whether they were previously known or not, subject to the availability of ground-based follow-up observations, resulting in the discovery of more than 130 new NEOs. The survey's uniform sensitivity, observing cadence, and image quality have permitted extrapolation of the 428 near-Earth asteroids (NEAs) detected by NEOWISE during the fully cryogenic portion of the WISEmission to the larger population. We find that there are 981 19 NEAs larger than 1km and 20,500 3000 NEAs larger than 100m. We show that the Spaceguard goal of detecting 90% of all 1km NEAs has been met, and that the cumulative size distribution is best represented by a broken power law with a slope of 1.32 0.14 below 1.5km. This power-law slope produces 13, 200 1900 NEAs with D > 140m. Although previous studies predict another break in the cumulative size distribution below D 50-100m, resulting in an increase in the number of NEOs in this size range and smaller, we did not detect enough objects to comment on this increase. The overall number for the NEA population between 100 and 1000m is lower than previous estimates. The numbers of near-Earth comets and potentially hazardous NEOs will be the subject of future work.

Idioma originalEnglish
Número de artículo156
PublicaciónAstrophysical Journal
Volumen743
N.º2
DOI
EstadoPublished - 20 dic 2011

Huella dactilar

near Earth objects
asteroids
asteroid
power law
slopes
Wide-field Infrared Survey Explorer
estimates
albedo
comets
cryogenics
availability
extrapolation
comet
range size
wavelength
sensitivity
wavelengths

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Mainzer, A., Grav, T., Bauer, J., Masiero, J., McMillan, R. S., Cutri, R. M., ... Wasserman, L. H. (2011). Neowise observations of near-earth objects: Preliminary results. Astrophysical Journal, 743(2), [156]. https://doi.org/10.1088/0004-637X/743/2/156
Mainzer, A. ; Grav, T. ; Bauer, J. ; Masiero, J. ; McMillan, R. S. ; Cutri, R. M. ; Walker, R. ; Wright, E. ; Eisenhardt, P. ; Tholen, D. J. ; Spahr, T. ; Jedicke, R. ; Denneau, L. ; Debaun, E. ; Elsbury, D. ; Gautier, T. ; Gomillion, S. ; Hand, E. ; Mo, W. ; Watkins, J. ; Wilkins, A. ; Bryngelson, G. L. ; Del Pino Molina, A. ; Desai, S. ; Camus, M. Gómez ; Hidalgo, S. L. ; Konstantopoulos, I. ; Larsen, J. A. ; Maleszewski, C. ; Malkan, M. A. ; Mauduit, J. C. ; Mullan, B. L. ; Olszewski, E. W. ; Pforr, J. ; Saro, A. ; Scotti, J. V. ; Wasserman, L. H. / Neowise observations of near-earth objects : Preliminary results. En: Astrophysical Journal. 2011 ; Vol. 743, N.º 2.
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abstract = "With the NEOWISE portion of the Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 μm, allowing us to refine estimates of their numbers, sizes, and albedos. The NEOWISE survey detected NEOs the same way whether they were previously known or not, subject to the availability of ground-based follow-up observations, resulting in the discovery of more than 130 new NEOs. The survey's uniform sensitivity, observing cadence, and image quality have permitted extrapolation of the 428 near-Earth asteroids (NEAs) detected by NEOWISE during the fully cryogenic portion of the WISEmission to the larger population. We find that there are 981 19 NEAs larger than 1km and 20,500 3000 NEAs larger than 100m. We show that the Spaceguard goal of detecting 90{\%} of all 1km NEAs has been met, and that the cumulative size distribution is best represented by a broken power law with a slope of 1.32 0.14 below 1.5km. This power-law slope produces 13, 200 1900 NEAs with D > 140m. Although previous studies predict another break in the cumulative size distribution below D 50-100m, resulting in an increase in the number of NEOs in this size range and smaller, we did not detect enough objects to comment on this increase. The overall number for the NEA population between 100 and 1000m is lower than previous estimates. The numbers of near-Earth comets and potentially hazardous NEOs will be the subject of future work.",
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Mainzer, A, Grav, T, Bauer, J, Masiero, J, McMillan, RS, Cutri, RM, Walker, R, Wright, E, Eisenhardt, P, Tholen, DJ, Spahr, T, Jedicke, R, Denneau, L, Debaun, E, Elsbury, D, Gautier, T, Gomillion, S, Hand, E, Mo, W, Watkins, J, Wilkins, A, Bryngelson, GL, Del Pino Molina, A, Desai, S, Camus, MG, Hidalgo, SL, Konstantopoulos, I, Larsen, JA, Maleszewski, C, Malkan, MA, Mauduit, JC, Mullan, BL, Olszewski, EW, Pforr, J, Saro, A, Scotti, JV & Wasserman, LH 2011, 'Neowise observations of near-earth objects: Preliminary results', Astrophysical Journal, vol. 743, n.º 2, 156. https://doi.org/10.1088/0004-637X/743/2/156

Neowise observations of near-earth objects : Preliminary results. / Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; Walker, R.; Wright, E.; Eisenhardt, P.; Tholen, D. J.; Spahr, T.; Jedicke, R.; Denneau, L.; Debaun, E.; Elsbury, D.; Gautier, T.; Gomillion, S.; Hand, E.; Mo, W.; Watkins, J.; Wilkins, A.; Bryngelson, G. L.; Del Pino Molina, A.; Desai, S.; Camus, M. Gómez; Hidalgo, S. L.; Konstantopoulos, I.; Larsen, J. A.; Maleszewski, C.; Malkan, M. A.; Mauduit, J. C.; Mullan, B. L.; Olszewski, E. W.; Pforr, J.; Saro, A.; Scotti, J. V.; Wasserman, L. H.

En: Astrophysical Journal, Vol. 743, N.º 2, 156, 20.12.2011.

Resultado de la investigación: Article

TY - JOUR

T1 - Neowise observations of near-earth objects

T2 - Preliminary results

AU - Mainzer, A.

AU - Grav, T.

AU - Bauer, J.

AU - Masiero, J.

AU - McMillan, R. S.

AU - Cutri, R. M.

AU - Walker, R.

AU - Wright, E.

AU - Eisenhardt, P.

AU - Tholen, D. J.

AU - Spahr, T.

AU - Jedicke, R.

AU - Denneau, L.

AU - Debaun, E.

AU - Elsbury, D.

AU - Gautier, T.

AU - Gomillion, S.

AU - Hand, E.

AU - Mo, W.

AU - Watkins, J.

AU - Wilkins, A.

AU - Bryngelson, G. L.

AU - Del Pino Molina, A.

AU - Desai, S.

AU - Camus, M. Gómez

AU - Hidalgo, S. L.

AU - Konstantopoulos, I.

AU - Larsen, J. A.

AU - Maleszewski, C.

AU - Malkan, M. A.

AU - Mauduit, J. C.

AU - Mullan, B. L.

AU - Olszewski, E. W.

AU - Pforr, J.

AU - Saro, A.

AU - Scotti, J. V.

AU - Wasserman, L. H.

PY - 2011/12/20

Y1 - 2011/12/20

N2 - With the NEOWISE portion of the Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 μm, allowing us to refine estimates of their numbers, sizes, and albedos. The NEOWISE survey detected NEOs the same way whether they were previously known or not, subject to the availability of ground-based follow-up observations, resulting in the discovery of more than 130 new NEOs. The survey's uniform sensitivity, observing cadence, and image quality have permitted extrapolation of the 428 near-Earth asteroids (NEAs) detected by NEOWISE during the fully cryogenic portion of the WISEmission to the larger population. We find that there are 981 19 NEAs larger than 1km and 20,500 3000 NEAs larger than 100m. We show that the Spaceguard goal of detecting 90% of all 1km NEAs has been met, and that the cumulative size distribution is best represented by a broken power law with a slope of 1.32 0.14 below 1.5km. This power-law slope produces 13, 200 1900 NEAs with D > 140m. Although previous studies predict another break in the cumulative size distribution below D 50-100m, resulting in an increase in the number of NEOs in this size range and smaller, we did not detect enough objects to comment on this increase. The overall number for the NEA population between 100 and 1000m is lower than previous estimates. The numbers of near-Earth comets and potentially hazardous NEOs will be the subject of future work.

AB - With the NEOWISE portion of the Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 μm, allowing us to refine estimates of their numbers, sizes, and albedos. The NEOWISE survey detected NEOs the same way whether they were previously known or not, subject to the availability of ground-based follow-up observations, resulting in the discovery of more than 130 new NEOs. The survey's uniform sensitivity, observing cadence, and image quality have permitted extrapolation of the 428 near-Earth asteroids (NEAs) detected by NEOWISE during the fully cryogenic portion of the WISEmission to the larger population. We find that there are 981 19 NEAs larger than 1km and 20,500 3000 NEAs larger than 100m. We show that the Spaceguard goal of detecting 90% of all 1km NEAs has been met, and that the cumulative size distribution is best represented by a broken power law with a slope of 1.32 0.14 below 1.5km. This power-law slope produces 13, 200 1900 NEAs with D > 140m. Although previous studies predict another break in the cumulative size distribution below D 50-100m, resulting in an increase in the number of NEOs in this size range and smaller, we did not detect enough objects to comment on this increase. The overall number for the NEA population between 100 and 1000m is lower than previous estimates. The numbers of near-Earth comets and potentially hazardous NEOs will be the subject of future work.

KW - infrared: planetary systems

KW - minor planets, asteroids: general

KW - planets and satellites: general

KW - surveys

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Mainzer A, Grav T, Bauer J, Masiero J, McMillan RS, Cutri RM y otros. Neowise observations of near-earth objects: Preliminary results. Astrophysical Journal. 2011 dic 20;743(2). 156. https://doi.org/10.1088/0004-637X/743/2/156