Coronal mass ejections (98 résultats)

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Hardcover. Etat : Very good. First Edition. ".provides researchers active in space physics with an overview of the current understanding of CMEs and ICMEs, and their effects in the heliosphere." Space Science Series of ISSI, Volume 21. Octavo: 484 p. with numerous textual figures (some color) and tables. Original glossy boards; issued without a dust jacket. Minor bumping to the corners and tips; otherwise very good.…

Hardcover. Etat : Very good. First Edition. ".provides researchers active in space physics with an overview of the current understanding of CMEs and ICMEs, and their effects in the heliosphere." Space Science Series of ISSI, Volume 21. Octavo: 484 p. with numerous textual figures (some color) and tables. Original glossy boards; issued without a dust jacket. Minor bumping to the corners and tips; otherwise very good.…

Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2024 in the subject Physics - Astronomy, , language: English, abstract: The most energetic phenomena in the heliosphere are known to be coronal mass ejections (CMEs), which acquire their energy from the Sun's strained magnetic fields. Coronal Mass Ejections disrupt the flow of the solar wind and produce disturbances that strike the Earth with sometimes catastrophic results. Coronal mass ejections are often associated with solar flares and prominence eruptions but they can also occur in the absence of either of these processes. The frequency of CMEs varies with the sunspot cycle. At solar minimum we observe about one CME a week. Near solar maximum we observe an average of 2 to 3 CMEs per day. We have studied different characteristics of coronal mass ejection based on the observation form Large Angel and Spectrometric Coronagraph (LASCO) on board of the Solar and Heliospheric Observatory (SOHO) space craft during the period 1996 -2006. It is noteworthy that the rate of occurrence of Class B CMEs is more than class A CME's. The occurrence spectrum of both classes of CMEs follows the trend of the phase of solar cycle and maximum number both types CME's seems to be occurred during maximum solar activity. It is also observed that the maximum number of class A, Class B CMEs have speed range 0-500 km/sec. We have observed that maximum number of Class A, Class B CME's occurred in apparent angular width range 00-900. It is also found that the maximum number of class A and class B CME's have occurred when the position angle ranges in 50-1000 and 2500-3000 respectively.…

Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - Document from the year 2023 in the subject Physics - Astronomy, , language: English, abstract: Coronal Mass Ejections are vast structures of plasma and magnetic fields that are expelled from the sun into the heliosphere. This material is detected by remote sensing and in-situ spacecraft observations. The present study deals with the influence of four types of CMEs namely Asymmetric 'Full' Halo CMEs, Partial Halo CMEs, Asymmetric and Complex 'Full' Halo CMEs and 'Full' Halo CMEs on cosmic ray neutron monitor intensity. The data of ground based neutron monitor of Moscow and CME events observed with instruments onboard and Wind spacecraft have been used in the present analysis. The method of superposed epoch (Chree) analysis has been used to the arrival times of these CMEs. It is noteworthy that the frequency of occurrence of Asymmetric 'Full' Halo CMEs is significantly high, whereas frequency of occurrence of Asymmetric and Complex 'Full' Halo CMEs is low compared to other CMEs. Significant enhancement in cosmic ray intensity is observed after 4 days of the onset of asymmetric full halo and 6 days after the onset of full halo CMEs. The fluctuations in cosmic ray intensity are more prior to the onset of both types of the CMEs. However, during Partial Halo CMEs the cosmic ray intensity peaks, 8- 9 days prior to the onset of CMEs and depressed 3 days prior to the onset of CMEs, whereas in case of asymmetric and complex full CMEs, the intensity depressed 2 days prior to the onset of CMEs and enhanced 2 days after the onset of CMEs. The deviations in cosmic ray intensity are more pronounced in case for asymmetric and complex full halo CMEs compared to other CMEs. The cosmic ray intensity shows nearly good anti-correlation with IMF strength (B) during asymmetric full halo CMEs and partial halo CMEs, whereas it shows poor correlation with B during other CMEs. The IMF, B significantly decreased five days prior to the onset of asymmetric and full halo CMEs and four days after the onset of partial halo CMEs, whereas IMF strength (B) significantly enhanced 5-6 days prior and after the onset of asymmetric and complex full halo CMEs. IMF strength (B) significantly depressed 2 days prior and 4 days after the onset of full halo CMEs. However, IMF, B significantly enhanced from its minimum to maximum values in 2 days interval prior to the onset of CMEs and in 3 days interval after the onset of CMEs. …

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Paperback. Etat : Brand New. 2014 edition. 119 pages. 9.00x6.25x0.50 inches. In Stock.

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Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - Space weather has attracted a lot of attention in recent times. Severe space weather can disrupt spacecraft, and on Earth can be the cause of power outages and power station failure. It also presents a radiation hazard for airline passengers and astronauts. These 'magnetic storms' are most commonly caused by coronal mass ejections, or CMES, which are large eruptions of plasma and magnetic field from the Sun that can reach speeds of several thousand km/s. In this SpringerBrief, Space Weather and Coronal Mass Ejections, author Timothy Howard briefly introduces the coronal mass ejection, its scientific importance, and its relevance to space weather at Earth and other planets. This title focuses on the latest advances in CME observation and modeling, including new results from the NASA STEREO and SDO missions. It also includes topical issues regarding space weather and the most recent observations and anecdotal examples of the impacts of space weather and CMEs.…

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Hardcover. Etat : new. Hardcover. IAU Symposium 388 brought together solar and stellar researchers on coronal mass ejections (CMEs), which are of great importance because of the intriguing physics involved in their origin and how they impact planets around the Sun and other stars. These proceedings are a collection of peer-reviewed papers presented at the symposium. The scientific program included solar sources; the interrelationship among observed phenomena such as CMEs, flares, and eruptive prominences; the detection and modeling of stellar CMEs; particle acceleration by CMEs; CME propagation into the interstellar medium; and their effects on planets around their host stars. The symposium demonstrated that a synergistic approach to solar and stellar CMEs is essential in understanding how magnetic energy is stored and released from spatially confined magnetic regions on the stars and their consequences for starplanet relations over various timescales. IAU Symposium 388 brought together solar and stellar researchers on coronal mass ejections (CMEs). It demonstrated that a synergistic approach to solar and stellar CMEs is essential in understanding how magnetic energy is stored and released from stars and their consequences for starplanet interactions. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

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Etat : New. pp. 270.

Buch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - The book introduces the solar coronal mass ejection phenomena. This includes both those observed in the corona and those further from the Sun, known as interplanetary coronal mass ejections. We discuss the history and physics behind these phenomena, theories describing their launch and evolution, association with other solar eruptive phenomena, and methods employed for their detection and scientific data extraction. Instruments used for their study (past, present and future) are also discussed, along with their resulting space weather effects on Earth and other planets. The latter requires a description of the Earth's magnetosphere, which is also included. Coronal Mass Ejections brings together solar physics, heliospheric physics, and magnetospheric physics, three traditionally separate fields of study. The content is accessible to beginning graduate students who are trying to master difficult fundamental concepts.…

Hardcover. Etat : new. Hardcover. IAU Symposium 388 brought together solar and stellar researchers on coronal mass ejections (CMEs), which are of great importance because of the intriguing physics involved in their origin and how they impact planets around the Sun and other stars. These proceedings are a collection of peer-reviewed papers presented at the symposium. The scientific program included solar sources; the interrelationship among observed phenomena such as CMEs, flares, and eruptive prominences; the detection and modeling of stellar CMEs; particle acceleration by CMEs; CME propagation into the interstellar medium; and their effects on planets around their host stars. The symposium demonstrated that a synergistic approach to solar and stellar CMEs is essential in understanding how magnetic energy is stored and released from spatially confined magnetic regions on the stars and their consequences for starplanet relations over various timescales. IAU Symposium 388 brought together solar and stellar researchers on coronal mass ejections (CMEs). It demonstrated that a synergistic approach to solar and stellar CMEs is essential in understanding how magnetic energy is stored and released from stars and their consequences for starplanet interactions. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

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Paperback. Etat : Brand New. 2011 edition. 268 pages. 9.25x6.10x0.63 inches. In Stock.