Results 21 to 30 of about 7,698 (293)

Coma revealed as an extended hard X-rays source by INTEGRAL IBIS/ISGRI [PDF]

, 2006
Aims. We report the INTEGRAL/IBIS observations of the Coma Cluster in the hard X-ray/soft-ray domain. Methods. Since the Coma Cluster appears as an extended source, its global intensity and significance cannot be directly extracted with standard coded ...
Arnaud, Bowyer, Briel, Bykov, Dow, Enßlin, F. Lebrun, Fusco-Femiano, Fusco-Femiano, G. Bélanger, Goldwurm, Gros, Honda, J. Paul, Krivonos, Labanti, Lebrun, M. Renaud, Neumann, R. Terrier, Rephaeli, Rephaeli, Rossetti, Sarazin, Sarazin, Ubertini, Winkler   +26 more
core   +5 more sources

X-Rays Trace the Volatile Content of Interstellar Objects

The Astrophysical Journal, 2023
The nondetection of a coma surrounding 1I/‘Oumuamua, the first discovered interstellar object (ISO), has prompted a variety of hypotheses to explain its nongravitational acceleration.
Samuel H. C. Cabot, Q. Daniel Wang, Darryl Z. Seligman   +2 more
doaj   +1 more source

On the minimum jet power of TEV BL Lac objects in the p-$\gamma$ model [PDF]

, 2018
We study the requirement on the jet power in the conventional p-$\gamma$ models (photopion production and Bethe-Heitler pair production) for TeV BL Lac objects.
Böttcher, Markus, Liu, Ruo-Yu, Wang, Xiang-Yu, Xue, Rui, Yan, Huirong   +4 more
core   +4 more sources

Modeling exospheres: analytical and numerical methods with application examples

Frontiers in Astronomy and Space Sciences
Exospheres, the tenuous gas environments surrounding planets, planetary satellites, and cometary comae, play a significant role in mediating the interactions of these astronomical bodies with their surrounding space environments.
Valeriy Tenishev, Yinsi Shou, Yuni Lee, Yuni Lee, Yingjuan Ma, Michael R. Combi   +5 more
doaj   +1 more source

Exploring the volatile composition of comets C/2012 F6 (Lemmon) and C/2012 S1 (ISON) with ALMA [PDF]

, 2017
Comets formed in the outer and cold parts of the disk which eventually evolved into our Solar System. Assuming that the comets have undergone no major processing, studying their composition provides insight in the pristine composition of the Solar Nebula.
Agúndez, A’Hearn, A’Hearn, Bockelee-Morvan, Boissier, Brinch, Budzien, Cochran, Combi, Combi, Cordiner, Cordiner, Cordiner, Cottin, Cottin, Crovisier, DiSanti, Eva G. Bøgelund, Friedel, Fuselier, Haser, Irvine, Keane, Lis, Michiel R. Hogerheijde, Milam, Mumma, Qi, Rodgers, Rodgers, Rodgers, Schöier, Smith, Snyder, Walsh, Wright   +35 more
core   +3 more sources

Coma

Neurosurgery Clinics of North America, 1999
Comatose patients are unresponsive to all external stimuli, noxious or otherwise. Neuro-ophthalmic techniques are paramount in the neurologic assessment of comatose patients, especially with regard to brain stem localization and diagnosis. Examination of the pupils, fundi, and corneal reflexes are all helpful; however, the ocular motility examination ...
openaire   +2 more sources

The Composition of Comets

, 2015
This paper is the result of the International Cometary Workshop, held in Toulouse, France in April 2014, where the participants came together to assess our knowledge of comets prior to the ESA Rosetta Mission. In this paper, we look at the composition of
Biver, Nicolas, Bockelee-Morvan, Dominique, Charnley, Steven B., Cochran, Anita L., Cordiner, Martin, Gicquel, Adeline, Hadamcik, Edith, Kuan, Yi-Jehng, Lasue, Jeremie, Levasseur-Regourd, Anny-Chantal, Mumma, Michael J., Paganini, Lucas, Schleicher, David G.   +12 more
core   +4 more sources

The Spatial Distribution Of OH And CN Radicals In The Coma Of Comet Encke [PDF]

, 2011
Multiple potential parent species have been proposed to explain CN abundances in comet comae, but the parent has not been definitively identified for all comets.
Cochran, Anita L., Dorman, Garrett R., Ihalawela, Chandrasiri A., Pierce, Donna M.   +3 more
core   +1 more source

Dust Properties of Comets Observed by Spitzer

The Planetary Science Journal, 2023
As comets journey into the inner solar system, they deliver particulates and volatile gases into their comae that reveal the most primitive materials in the solar system.
David E. Harker, Diane H. Wooden, Michael S. P. Kelley, Charles E. Woodward   +3 more
doaj   +1 more source

The Composition of Dust in Jupiter-Family Comets as Inferred from Infrared Spectroscopy

, 2008
We review the composition of Jupiter-family comet dust as inferred from infrared spectroscopy. We find that Jupiter-family comets have 10 micron silicate emission features with fluxes roughly 20-25% over the dust continuum (emission strength 1.20-1.25 ...
Kelley, Michael S., Wooden, Diane H.
core   +1 more source