geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Small meteoroids' major contribution to Mercury's exosphere


, : Small meteoroids' major contribution to Mercury's exosphere. Icarus 227: 1-7

The contribution of the meteoroid population to the generation of Mercury's exosphere is analyzed to determine which segment contributes most greatly to exospheric refilling via the process of meteoritic impact vaporization. For the meteoroid data, a differential mass distribution based on work by Grün et al. (Grün, E., Zook, H.A., Fechtig, H., Giese, R.H. [1985]. Icarus 62(2), 244-272) and a differential velocity distribution based on the work of Zook (Zook, H.A. [1975]. In: 6th Lunar Science Conference, vol. 2. Pergamon Press, Inc., Houston, TX, pp. 1653-1672) is used. These distributions are then evaluated using the method employed by Cintala (Cintala, M.J. [1992]. J. Geophys. Res. 97(E1), 947-974) to determine impact rates for selected mass and velocity segments of the meteoroid population. The amount of vapor created by a single meteor impact is determined by using the framework created by Berezhnoy and Klumov (Berezhnoy, A.A., Klumov, B.A. [2008] Icarus, 195(2), 511-522). By combining the impact rate of meteoroids with the amount of vapor a single such impact creates, we derive the total vapor production rate which that meteoroid mass segment contributes to the Herman exosphere. It is shown that meteoroids with a mass of 2.1 × 10-4 g release the largest amount of vapor into Mercury's exosphere. For meteoroids in the mass range of 10-18 g to 10 g, 90% of all the vapor produced is due to impacts by meteoroids in the mass range 4.2 × 10-7 g ≤ m ≤ 8.3 × 10-2 g.

US$19.90

PMID: 24817768

DOI: 10.1016/j.icarus.2013.07.032


Other references

Svetovidov, A.N., 1955: Observations on the structure of brain in fishes 2 The brain of Clupeidae. Travaux de l'Institut de Zoologie Acad Sci SSSR: 21: 368-392

Nasta, P.; Vrugt, J.A.; Romano, N., 2013: Prediction of the saturated hydraulic conductivity from Brooks and Coreys water retention parameters. Prediction of flow through variably saturated porous media requires accurate knowledge of the soil hydraulic properties, namely the water retention function (WRF) and the hydraulic conductivity function (HCF). Unfortunately, direct measurement of...

Klimetzek, D., 1975: Extent and effect of chemical control operations against larvae of Scots Pine pests in northern Bavaria. Presents data on chemical control operations between 1925 and 1970, in which a total of 42 000 ha (mostly state forest) were treated against Bupalus piniarius, Panolis flammea, Lymantria monacha, and Diprion pine. A comparison of infestations in t...

Unno, K.; Fujitani, K.; Takamori, N.; Takabayashi, F.; Maeda, K-Ichi.; Miyazaki, H.; Tanida, N.; Iguchi, K.; Shimoi, K.; Hoshino, M., 2012: Theanine intake improves the shortened lifespan, cognitive dysfunction and behavioural depression that are induced by chronic psychosocial stress in mice. To evaluate the psychosocial effect on lifespan and cognitive function, this study investigated the effect of confrontational housing on mice because conflict among male mice is a psychosocial stress. In addition, it investigated the anti-stress e...

Blonde, L., 2006: Sildenafil citrate for erectile dysfunction in men with diabetes and cardiovascular risk factors: a retrospective analysis of pooled data from placebo-controlled trials. Cardiovascular (CV) risk factors are associated with an increased risk of erectile dysfunction (ED). In men with diabetes mellitus (DM), pooled from clinical trials of sildenafil treatment for ED, this retrospective analysis determined efficacy an...

Hanson, M.R.; Gálvez-Jiménez, N., 2001: Catechol-O-methyltransferase inhibitors in the management of Parkinson's disease. Parkinson's disease is the most common neurodegenerative disease in which the chemical pathology is known and effective symptomatic treatment, levodopa, is available. Therapy in the initial years after initiation with dopa decarboxylase inhib...

Clarke, B.; Kennelly, S.; Shanley, D.; Hogan-Lowe, D.; McCormack, P.M.E., 2010: Does HIPE data capture the complexity of stroke patients in an acute hospital setting?. The Hospital Inpatient Enquiry (HIPE) system is currently used as a principle source of national data on discharges from acute hospitals. The Casemix Programme is used to calculate funding for patient care (HIPE activity and Specialty Costs Return...

Slab, Jaroslav, 1964: Contribution to the morphology of scabies. The paper describes the anomalous morphology of changes on the skin of a suckling, caused by scabies, which lead to diagnostic uncertainties in the clinic. From skin excissions, which had to be taken from the baby's back, the characteristic l...

Shah, M.K.; Carayannopoulos, A.G.; Burke, D.T.; Al-Adawi, S., 2007: A comparison of functional outcomes in hypoxia and traumatic brain injury: a pilot study. We present our experience with 30 patients on functional outcomes of patients with anoxic brain injury (ABI, n=15) due to cardiac etiologies from freestanding inpatient rehabilitation hospital. A convenience sample of patient with traumatic brain...

Katagiri, N.; Katagiri, Y.; Shimatani, Y.; Nishimura, I.; Nishimura, M.; Hara, R.; Hara, T., 1996: Retinochrome is localized in lens cell of the Onchidium dorsal eye. Zoological Science (Tokyo) 13(SUPPL ): 129