Spectral observations of the galaxy M 82. II

Amirkhanyan, A. S.; Gagen-Torn, V. A.; Решетников, В. П.

doi:10.1007/bf01005734

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…• (full angle) (Burbidge et al 1964;Axon & Taylor 1978;Amirkhanyan et al 1982Amirkhanyan et al , 1985Bland & Tully 1988 [BT-88]; Götz et al 1990;McKeith et al 1995 [M-95]; Shopbell & Bland-Hawthorn 1998 [SBH-98]), although also considerably wider cones of Ω ≈ 60…”

Section: Introductionmentioning

confidence: 99%

The rotating visible outflow in M 82

Greve

2004

A&A

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Abstract. M 82's minor axis outflow is seen at visible wavelengths as more or less regular hollow cones on both sides of the galactic disk. The outflowing material is expected to entrain the rotation, or part of the rotation, of the disk where the outflow originates. From the conservation of angular momentum it is furthermore expected that the outflowing material continues to rotate at large distances from the disk, although probably with smaller velocity because of radial divergence of the cones. We provide evidence of this kinematic picture from long-slit spectra of the cone wall H α , [NII] and [SII] emission lines taken at ±20 (±300 pc) and ∼±40 (∼±600 pc) distance from the center and parallel to the minor axis, from data extracted from the literature, and from a cone model fit of the data. The angular momentum which is entrained in the outflow and eventually dissipated is a small fraction of the total angular momentum associated with the stars and gas in the central part of the disk. We compare our observation of the visible outflow with the outflow of dragged-out material investigated in mm-wavelength CO by other observers. It seems that the material observed at visible wavelengths is confined to narrow cones, and blows out at velocities larger than the escape velocity of the galaxy. The dragged-out material moves at slower velocities and on wider cones, and may fall back into the galaxy.

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Section: Introductionmentioning

confidence: 99%

The rotating visible outflow in M 82

Greve

2004

A&A

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“…It was demonstrated that for S-states the angular current disappears, and the spin magnetic moment current is present. Many studies addressed the spin and angular current [51][52][53] in spherical and cylindrical QD; in such systems, it is also possible to recognize the physical conditions through which the one-electron orbital current disappears and we stay only with the spin magnetic moment current. Consequently, the fundamental feature of nanostructures is the ability to control the current value associated with the spin magnetic moment of one-electron in the studied system.…”

Section: Introductionmentioning

confidence: 99%

Exact ground state solution of shallow hydrogenic impurity states of a spherical parabolic GaAs/InAs quantum dot

Nammas¹

2019

Phys. Scr.

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The ground state spin magnetic moment current, binding energy, wave function and diamagnetic susceptibility of a shallow hydrogenic impurity located at the center of a parabolic spherical quantum dot (QD) are calculated analytically as a function of the dot size, interaction strength and confinement frequency. For comparison purposes, the results are discussed in the presence and in the absence of an impurity. Also, the dependence of the spin magnetic moment current on the spherical coordinates are derived, it is found that the spin magnetic moment current exhibits a peak structure and this current has a pronounced maximum for both small dot sizes and in the absence of impurities. Our results show that the impurities’ ground state binding energy enhances as the dot dimension decreases and depends strongly on the interaction strength as the dot size increases and reduces to zero in the bulk limit for large dimensions of the dot. Moreover, the harmonic interaction has a strong influence on the diamagnetic susceptibility when the dot size increases where it decreases sharply in the presence of impurities while in the absence of impurities it decreases smoothly. In addition, the intensity of the magnetic field created by the spin magnetic moment current at the center of the QD has been calculated. It is concluded that there is a critical value for characteristic parameters and the dot size for each type of semiconductor QD to give a specific function that might be important for nanotechnology manufacturing techniques.

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9.4.3 Starbursts

Biermann¹

Interstellar Matter, Galaxy, Universe

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Spectral observations of the galaxy M 82. II

Cited by 3 publications

References 8 publications

The rotating visible outflow in M 82

The rotating visible outflow in M 82

Exact ground state solution of shallow hydrogenic impurity states of a spherical parabolic GaAs/InAs quantum dot

9.4.3 Starbursts

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