Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope

被引:4
作者
Chichura, P. M. [1 ,2 ]
Foster, A. [3 ]
Patel, C. [4 ]
Ossa-Jaen, N. [5 ]
Ade, P. A. R. [6 ]
Ahmed, Z. [7 ,8 ]
Anderson, A. J. [2 ,9 ]
Archipley, M. [10 ,11 ]
Austermann, J. E. [12 ,13 ]
Avva, J. S. [14 ]
Balkenhol, L. [15 ]
Barry, P. S. [2 ,16 ]
Thakur, R. Basu [2 ,17 ]
Beall, J. A. [12 ]
Benabed, K. [18 ,19 ]
Bender, A. N. [2 ,16 ]
Benson, B. A. [2 ,9 ,20 ]
Bianchini, F. [7 ,15 ,21 ]
Bleem, L. E. [2 ,16 ]
Bouchet, F. R. [18 ,19 ]
Bryant, L. [22 ]
Byrum, K. [16 ]
Carlstrom, J. E. [1 ,2 ,16 ,20 ,22 ]
Carter, F. W. [2 ,16 ]
Cecil, T. W. [16 ]
Chang, C. L. [2 ,16 ,20 ]
Chaubal, P. [15 ]
Chen, G. [23 ]
Chiang, H. C. [24 ,25 ]
Cho, H. -M. [8 ]
Chou, T-L. [1 ,2 ]
Citron, R. [23 ]
Cliche, J. -F. [26 ,27 ]
Crawford, T. M. [2 ,20 ]
Crites, A. T. [2 ,20 ,28 ,29 ]
Cukierman, A. [7 ,8 ,21 ]
Daley, C. M. [10 ]
Denison, E. V. [12 ]
Dibert, K. [2 ,20 ]
Ding, J. [30 ]
Dobbs, M. A. [26 ,27 ,31 ]
Dutcher, D. [1 ,2 ]
Everett, W. [32 ]
Feng, C. [33 ]
Ferguson, K. R. [34 ]
Fu, J. [10 ]
Galli, S. [18 ,19 ]
Gallicchio, J. [2 ,35 ]
Gambrel, A. E. [2 ]
Gardner, R. W. [22 ]
机构
[1] Univ Chicago, Dept Phys, 5640 S Ellis Ave, Chicago, IL 60637 USA
[2] Univ Chicago, Kavli Inst Cosmol Phys, 5640 S Ellis Ave, Chicago, IL 60637 USA
[3] Case Western Reserve Univ, Dept Phys, Cleveland Hts, OH 44106 USA
[4] Univ Illinois, Dept Phys, 1110 West Green St, Urbana, IL 61801 USA
[5] Univ Redlands, Dept Phys, 1267 E Colton Ave, Redlands, CA 92374 USA
[6] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3YB, England
[7] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA
[8] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA
[9] Fermilab Natl Accelerator Lab, MS209,POB 500, Batavia, IL 60510 USA
[10] Univ Illinois, Dept Astron, 1002 West Green St, Urbana, IL 61801 USA
[11] Natl Ctr Supercomp Applicat, Ctr AstroPhys Surveys, Urbana, IL 61801 USA
[12] NIST Quantum Devices Grp, 325 Broadway Mailcode 817 03, Boulder, CO 80305 USA
[13] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[14] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[15] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
[16] Argonne Natl Lab, High Energy Phys Div, 9700 South Cass Ave, Argonne, IL 60439 USA
[17] CALTECH, 1200 East Calif Boulevard, Pasadena, CA 91125 USA
[18] Inst Astrophys Paris, UMR 7095, CNRS, 98 bis Blvd Arago, F-75014 Paris, France
[19] Sorbonne Univ, 98 bis Blvd Arago, F-75014 Paris, France
[20] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA
[21] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
[22] Univ Chicago, Enrico Fermi Inst, 5640 South Ellis Ave, Chicago, IL 60637 USA
[23] Univ Chicago, 5640 South Ellis Ave, Chicago, IL 60637 USA
[24] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada
[25] Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Durban, South Africa
[26] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada
[27] McGill Univ, McGill Space Inst, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada
[28] Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada
[29] Univ Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada
[30] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA
[31] Canadian Inst Adv Res, CIFAR Program Grav & Extreme Universe, Toronto, ON M5G 1Z8, Canada
[32] Univ Colorado, CASA, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA
[33] Univ Sci & Technol China, Dept Astron, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
[34] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[35] Harvey Mudd Coll, 301 Platt Blvd, Claremont, CA 91711 USA
[36] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
[37] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan
[38] Univ Calif, Dept Phys & Astron, One Shields Ave, Davis, CA 95616 USA
[39] Univ Penn, Dept Phys & Astron, 209 S 33rd St, Philadelphia, PA 19064 USA
[40] Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA
[41] Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA
[42] Univ Oslo, Inst Theoret Astrophys, Box 1029 Blindern, NO-0315 Oslo, Norway
[43] CALTECH, TAPIR, Walter Burke Inst Theoret Phys, 1200 E Calif Blvd, Pasadena, CA 91125 USA
[44] Univ Minnesota, Sch Phys & Astron, 116 Church St SE, Minneapolis, MN 55455 USA
[45] Case Western Reserve Univ, Dept Phys, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA
[46] Yale Univ, Dept Phys, POB 208120, New Haven, CT 06520 USA
[47] Sch Art Inst Chicago, Liberal Arts Dept, 112 S Michigan Ave, Chicago, IL 60603 USA
[48] Three Speed Log Inc, Victoria, BC V8S 3Z5, Canada
[49] Univ Arizona, Dept Planetary Sci, 1629 East Univ Blvd, Tucson, AZ 85722 USA
[50] Harvard Smithsonian Ctr AstroPhys, 60 Garden St, Cambridge, MA 02138 USA
基金
美国国家航空航天局; 美国国家科学基金会;
关键词
MAIN-BELT ASTEROIDS; THERMAL-PROPERTIES; RADAR SURVEY; SUBMILLIMETER; POLARIZATION; EMISSION; DENSITY; CERES; OBJECTS; MODELS;
D O I
10.3847/1538-4357/ac89ec
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first measurements of asteroids in millimeter wavelength data from the South Pole Telescope (SPT), which is used primarily to study the cosmic microwave background (CMB). We analyze maps of two similar to 270 deg(2) sky regions near the ecliptic plane, each observed with the SPTpol camera similar to 100 times over 1 month. We subtract the mean of all maps of a given field, removing static sky signal, and then average the mean-subtracted maps at known asteroid locations. We detect three asteroids-(324) Bamberga, (13) Egeria, and (22) Kalliope-with signal-to-noise ratios (S/N) of 11.2, 10.4, and 6.1, respectively, at 2.0 mm (150 GHz); we also detect (324) Bamberga with an S/N of 4.1 at 3.2 mm (95 GHz). We place constraints on these asteroids' effective emissivities, brightness temperatures, and light-curve modulation amplitude. Our flux density measurements of (324) Bamberga and (13) Egeria roughly agree with predictions, while our measurements of (22) Kalliope suggest lower flux, corresponding to effective emissivities of 0.64 +/- 0.11 at 2.0 and < 0.47 at 3.2 mm. We predict the asteroids detectable in other SPT data sets and find good agreement with detections of (772) Tanete and (1093) Freda in recent data from the SPT-3G camera, which has similar to 10x the mapping speed of SPTpol. This work is the first focused analysis of asteroids in data from CMB surveys, and it demonstrates we can repurpose historic and future data sets for asteroid studies. Future SPT measurements can help constrain the distribution of surface properties over a larger asteroid population.
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页数:17
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