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Your search keyword '"Stansberry, J. A."' showing total 23 results
Start Over Author "Stansberry, J. A." Publisher edp sciences
23 results on '"Stansberry, J. A."'

2. 'TNOs are Cool': A survey of the trans-Neptunian region: XIV. Size/albedo characterization of the Haumea family observed with Herschel and Spitzer

Author

German Centre for Air and Space Travel, European Commission, Hungarian Academy of Sciences, Fundação para a Ciência e a Tecnologia (Portugal), Hungarian Scientific Research Fund, Vilenius, E., Stansberry, J., Müller, T., Mueller, M., Kiss, C., Santos Sanz, Pablo, Mommert, M., Pál, A., Lellouch, E., Ortiz, José Luis, Peixinho, N., Thirouin, A., Lykawka, P.S., Horner, J., Duffard, René D., Fornasier, S., Delsanti, A., German Centre for Air and Space Travel, European Commission, Hungarian Academy of Sciences, Fundação para a Ciência e a Tecnologia (Portugal), Hungarian Scientific Research Fund, Vilenius, E., Stansberry, J., Müller, T., Mueller, M., Kiss, C., Santos Sanz, Pablo, Mommert, M., Pál, A., Lellouch, E., Ortiz, José Luis, Peixinho, N., Thirouin, A., Lykawka, P.S., Horner, J., Duffard, René D., Fornasier, S., and Delsanti, A.

Abstract

Context. A group of trans-Neptunian objects (TNOs) are dynamically related to the dwarf planet 136108 Haumea. Ten of them show strong indications of water ice on their surfaces, are assumed to have resulted from a collision, and are accepted as the only known TNO collisional family. Nineteen other dynamically similar objects lack water ice absorptions and are hypothesized to be dynamical interlopers. Aims. We have made observations to determine sizes and geometric albedos of six of the accepted Haumea family members and one dynamical interloper. Ten other dynamical interlopers have been measured by previous works. We compare the individual and statistical properties of the family members and interlopers, examining the size and albedo distributions of both groups. We also examine implications for the total mass of the family and their ejection velocities. Methods. We use far-infrared space-based telescopes to observe the target TNOs near their thermal peak and combine these data with optical magnitudes to derive sizes and albedos using radiometric techniques. Using measured and inferred sizes together with ejection velocities, we determine the power-law slope of ejection velocity as a function of effective diameter. Results. The detected Haumea family members have a diversity of geometric albedos 0.3-0.8, which are higher than geometric albedos of dynamically similar objects without water ice. The median geometric albedo for accepted family members is pV = 0.48-0.18 +0.28, compared to 0.08-0.05 +0.07 for the dynamical interlopers. In the size range D = 175-300 km, the slope of the cumulative size distribution is q = 3.2-0.4 +0.7 for accepted family members, steeper than the q = 2.0 ± 0.6 slope for the dynamical interlopers with D < 500 km. The total mass of Haumea's moons and family members is 2.4% of Haumea's mass. The ejection velocities required to emplace them on their current orbits show a dependence on diameter, with a power-law slope of 0.21-0.50. © ESO 2018.

Published
2018

3. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Vilenius, E., primary, Stansberry, J., additional, Müller, T., additional, Mueller, M., additional, Kiss, C., additional, Santos-Sanz, P., additional, Mommert, M., additional, Pál, A., additional, Lellouch, E., additional, Ortiz, J. L., additional, Peixinho, N., additional, Thirouin, A., additional, Lykawka, P. S., additional, Horner, J., additional, Duffard, R., additional, Fornasier, S., additional, and Delsanti, A., additional

Published
2018
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6. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Santos-Sanz, P., primary, Lellouch, E., additional, Groussin, O., additional, Lacerda, P., additional, Müller, T. G., additional, Ortiz, J. L., additional, Kiss, C., additional, Vilenius, E., additional, Stansberry, J., additional, Duffard, R., additional, Fornasier, S., additional, Jorda, L., additional, and Thirouin, A., additional

Published
2017
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8. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Duffard, R., primary, Pinilla-Alonso, N., additional, Santos-Sanz, P., additional, Vilenius, E., additional, Ortiz, J. L., additional, Mueller, T., additional, Fornasier, S., additional, Lellouch, E., additional, Mommert, M., additional, Pal, A., additional, Kiss, C., additional, Mueller, M., additional, Stansberry, J., additional, Delsanti, A., additional, Peixinho, N., additional, and Trilling, D., additional

Published
2014
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9. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Vilenius, E., primary, Kiss, C., additional, Müller, T., additional, Mommert, M., additional, Santos-Sanz, P., additional, Pál, A., additional, Stansberry, J., additional, Mueller, M., additional, Peixinho, N., additional, Lellouch, E., additional, Fornasier, S., additional, Delsanti, A., additional, Thirouin, A., additional, Ortiz, J. L., additional, Duffard, R., additional, Perna, D., additional, and Henry, F., additional

Published
2014
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10. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Lellouch, E., primary, Santos-Sanz, P., additional, Lacerda, P., additional, Mommert, M., additional, Duffard, R., additional, Ortiz, J. L., additional, Müller, T. G., additional, Fornasier, S., additional, Stansberry, J., additional, Kiss, Cs., additional, Vilenius, E., additional, Mueller, M., additional, Peixinho, N., additional, Moreno, R., additional, Groussin, O., additional, Delsanti, A., additional, and Harris, A. W., additional

Published
2013
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11. TNOs are Cool: A survey of the trans-Neptunian region

Author

Fornasier, S., primary, Lellouch, E., additional, Müller, T., additional, Santos-Sanz, P., additional, Panuzzo, P., additional, Kiss, C., additional, Lim, T., additional, Mommert, M., additional, Bockelée-Morvan, D., additional, Vilenius, E., additional, Stansberry, J., additional, Tozzi, G. P., additional, Mottola, S., additional, Delsanti, A., additional, Crovisier, J., additional, Duffard, R., additional, Henry, F., additional, Lacerda, P., additional, Barucci, A., additional, and Gicquel, A., additional

Published
2013
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12. The long-wavelength thermal emission of the Pluto-Charon system from Herschel observations. Evidence for emissivity effects.

Author

Lellouch, E., Santos-Sanz, P., Fornasier, S., Lim, T., Stansberry, J., Vilenius, E., Kiss, Cs., Müller, T., Protopapa, S., Panuzzo, P., and Moreno, R.

Subjects
WAVELENGTHS, PLUTO (Dwarf planet), CHARON (Satellite), EMISSIVITY
Abstract

Thermal observations of the Pluto-Charon system acquired by the Herschel Space Observatory in February 2012 are presented. They consist of photometric measurements with the PACS and SPIRE instruments (nine visits to the Pluto system each), covering six wavelengths from 70 to 500 µm altogether. The thermal light curve of Pluto-Charon is observed in all filters, albeit more marginally at 160 and especially 500 µm. Putting these data into the context of older ISO, Spitzer and ground-based observations indicates that the brightness temperature (TB) of the system (rescaled to a common heliocentric distance) drastically decreases with increasing wavelength, from ~53 K at 20 μm to ~35 K at 500 μm, and perhaps ever less at longer wavelengths. Considering a variety of diurnal and/or seasonal thermophysical models, we show that TB values of 35 K are lower than any expected temperature for the dayside surface or subsurface of Pluto and Charon, implying a low surface emissivity. Based on multiterrain modeling, we infer a spectral emissivity that decreases steadily from 1 at 20-25 μm to ~0.7 at 500 μm. This kind of behavior is usually not observed in asteroids (when proper allowance is made for subsurface sounding), but is found in several icy surfaces of the solar system. We tentatively identify that a combination of a strong dielectric constant and a considerable surface material transparency (typical penetration depth ~1 cm) is responsible for the effect. Our results have implications for the interpretation of the temperature measurements by REX/New Horizons at 4.2 cm wavelength. [ABSTRACT FROM AUTHOR]

Published
2016
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13. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Vilenius, E., primary, Kiss, C., additional, Mommert, M., additional, Müller, T., additional, Santos-Sanz, P., additional, Pal, A., additional, Stansberry, J., additional, Mueller, M., additional, Peixinho, N., additional, Fornasier, S., additional, Lellouch, E., additional, Delsanti, A., additional, Thirouin, A., additional, Ortiz, J. L., additional, Duffard, R., additional, Perna, D., additional, Szalai, N., additional, Protopapa, S., additional, Henry, F., additional, Hestroffer, D., additional, Rengel, M., additional, Dotto, E., additional, and Hartogh, P., additional

Published
2012
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14. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Pál, A., primary, Kiss, C., additional, Müller, T. G., additional, Santos-Sanz, P., additional, Vilenius, E., additional, Szalai, N., additional, Mommert, M., additional, Lellouch, E., additional, Rengel, M., additional, Hartogh, P., additional, Protopapa, S., additional, Stansberry, J., additional, Ortiz, J.-L., additional, Duffard, R., additional, Thirouin, A., additional, Henry, F., additional, and Delsanti, A., additional

Published
2012
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15. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Santos-Sanz, P., primary, Lellouch, E., additional, Fornasier, S., additional, Kiss, C., additional, Pal, A., additional, Müller, T. G., additional, Vilenius, E., additional, Stansberry, J., additional, Mommert, M., additional, Delsanti, A., additional, Mueller, M., additional, Peixinho, N., additional, Henry, F., additional, Ortiz, J. L., additional, Thirouin, A., additional, Protopapa, S., additional, Duffard, R., additional, Szalai, N., additional, Lim, T., additional, Ejeta, C., additional, Hartogh, P., additional, Harris, A. W., additional, and Rengel, M., additional

Published
2012
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16. TNOs are cool: A survey of the trans-Neptunian region

Author

Mommert, M., primary, Harris, A. W., additional, Kiss, C., additional, Pál, A., additional, Santos-Sanz, P., additional, Stansberry, J., additional, Delsanti, A., additional, Vilenius, E., additional, Müller, T. G., additional, Peixinho, N., additional, Lellouch, E., additional, Szalai, N., additional, Henry, F., additional, Duffard, R., additional, Fornasier, S., additional, Hartogh, P., additional, Mueller, M., additional, Ortiz, J. L., additional, Protopapa, S., additional, Rengel, M., additional, and Thirouin, A., additional

Published
2012
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17. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Lellouch, E., primary, Kiss, C., additional, Santos-Sanz, P., additional, Müller, T. G., additional, Fornasier, S., additional, Groussin, O., additional, Lacerda, P., additional, Ortiz, J. L., additional, Thirouin, A., additional, Delsanti, A., additional, Duffard, R., additional, Harris, A. W., additional, Henry, F., additional, Lim, T., additional, Moreno, R., additional, Mommert, M., additional, Mueller, M., additional, Protopapa, S., additional, Stansberry, J., additional, Trilling, D., additional, Vilenius, E., additional, Barucci, A., additional, Crovisier, J., additional, Doressoundiram, A., additional, Dotto, E., additional, Gutiérrez, P. J., additional, Hainaut, O., additional, Hartogh, P., additional, Hestroffer, D., additional, Horner, J., additional, Jorda, L., additional, Kidger, M., additional, Lara, L., additional, Rengel, M., additional, Swinyard, B., additional, and Thomas, N., additional

Published
2010
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18. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Müller, T. G., primary, Lellouch, E., additional, Stansberry, J., additional, Kiss, C., additional, Santos-Sanz, P., additional, Vilenius, E., additional, Protopapa, S., additional, Moreno, R., additional, Mueller, M., additional, Delsanti, A., additional, Duffard, R., additional, Fornasier, S., additional, Groussin, O., additional, Harris, A. W., additional, Henry, F., additional, Horner, J., additional, Lacerda, P., additional, Lim, T., additional, Mommert, M., additional, Ortiz, J. L., additional, Rengel, M., additional, Thirouin, A., additional, Trilling, D., additional, Barucci, A., additional, Crovisier, J., additional, Doressoundiram, A., additional, Dotto, E., additional, Gutiérrez, P. J., additional, Hainaut, O. R., additional, Hartogh, P., additional, Hestroffer, D., additional, Kidger, M., additional, Lara, L., additional, Swinyard, B., additional, and Thomas, N., additional

Published
2010
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19. “TNOs are Cool”: A survey of the trans-Neptunian region

Author

Lim, T. L., primary, Stansberry, J., additional, Müller, T. G., additional, Mueller, M., additional, Lellouch, E., additional, Kiss, C., additional, Santos-Sanz, P., additional, Vilenius, E., additional, Protopapa, S., additional, Moreno, R., additional, Delsanti, A., additional, Duffard, R., additional, Fornasier, S., additional, Groussin, O., additional, Harris, A. W., additional, Henry, F., additional, Horner, J., additional, Lacerda, P., additional, Mommert, M., additional, Ortiz, J. L., additional, Rengel, M., additional, Thirouin, A., additional, Trilling, D., additional, Barucci, A., additional, Crovisier, J., additional, Doressoundiram, A., additional, Dotto, E., additional, Gutiérrez Buenestado, P. J., additional, Hainaut, O., additional, Hartogh, P., additional, Hestroffer, D., additional, Kidger, M., additional, Lara, L., additional, Swinyard, B. M., additional, and Thomas, N., additional

Published
2010
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22. "TNOs are Cool": A survey of the trans-Neptunian region VII. Size and surface characteristics of (90377) Sedna and 2010 EK139.

Author

Pál, A., Kiss, C., Müller, T. G., Santos-Sanz, P., Vilenius, E., Szalai, N., Mommert, M., Lellouch, E., Rengel, M., Hartogh, P., Protopapa, S., Stansberry, J., Ortiz, J.-L., Duffard, R., Thirouin, A., Henry, F., and Delsanti, A.

Subjects
ASTROPHYSICAL radiation, SOLAR radiation, ELECTROMAGNETIC waves, ASTRONOMY, SPECTRAL energy distribution, RADIATION
Abstract

We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans- Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the "TNOs are Cool!" key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces might be covered by ices in a significantly larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 ± 80 km and 470+35-10 km, while the respective geometric albedos are pV =0.32 ± 0.06 and 0.25+0.02-0.05. These estimates are based on thermophysical model techniques. [ABSTRACT FROM AUTHOR]

Published
2012
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23. "TNOs are Cool": A survey of the trans-Neptunian region VII. Size and surface characteristics of (90377) Sedna and 2010 EK139.

Author

Pál, A., Kiss, C., Müller, T. G., Santos-Sanz, P., Vilenius, E., Szalai, N., Mommert, M., Lellouch, E., Rengel, M., Hartogh, P., Protopapa, S., Stansberry, J., Ortiz, J.-L., Duffard, R., Thirouin, A., Henry, F., and Delsanti, A.

Subjects
*ASTROPHYSICAL radiation, *SOLAR radiation, *ELECTROMAGNETIC waves, *ASTRONOMY, *SPECTRAL energy distribution, *RADIATION
Abstract

We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans- Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the "TNOs are Cool!" key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces might be covered by ices in a significantly larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 ± 80 km and 470+35-10 km, while the respective geometric albedos are pV =0.32 ± 0.06 and 0.25+0.02-0.05. These estimates are based on thermophysical model techniques. [ABSTRACT FROM AUTHOR]

Published
2012
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