Habitable Zones around Evolved Stars
... Reimers’ relation: Mdot = -dM*/dt = η 4e-13 LR/M solar masses/year from fitting observations – it is, however, strongly affected by selection bias. The Padova “Bowen & Willson (1991)” formula is not the same as our current formula (derived from later models with different selection criteria). Wachte ...
... Reimers’ relation: Mdot = -dM*/dt = η 4e-13 LR/M solar masses/year from fitting observations – it is, however, strongly affected by selection bias. The Padova “Bowen & Willson (1991)” formula is not the same as our current formula (derived from later models with different selection criteria). Wachte ...
Presentation file
... 3. Vibration/Pulsation -- e mechanism (in the core) no longer considered applicable to evolved stars -- k mechanism in the envelope periods of weeks to months 4. Sub-photospheric – violent mode or strange mode instabilities Glatzel et al, Guzik, Stothers & Chin Caused by increase in opacity due to F ...
... 3. Vibration/Pulsation -- e mechanism (in the core) no longer considered applicable to evolved stars -- k mechanism in the envelope periods of weeks to months 4. Sub-photospheric – violent mode or strange mode instabilities Glatzel et al, Guzik, Stothers & Chin Caused by increase in opacity due to F ...
Electric Potential
... E = V/ Δd – for uniform electric fields! (E can be expressed as N/C or V/m) Does not apply to fields caused by point charges! ...
... E = V/ Δd – for uniform electric fields! (E can be expressed as N/C or V/m) Does not apply to fields caused by point charges! ...
Composition and Mass Loss
... Y is more important than Z for fixing the luminosity As a star evolves Z becomes more important as the energy generation involves Z (CNO dominates in higher mass stars, if there is CNO) The Teff position of the red giant branch is insensitive to Y or Z but the luminosity varies by a factor of 4 acco ...
... Y is more important than Z for fixing the luminosity As a star evolves Z becomes more important as the energy generation involves Z (CNO dominates in higher mass stars, if there is CNO) The Teff position of the red giant branch is insensitive to Y or Z but the luminosity varies by a factor of 4 acco ...
quiz_1 - People Server at UNCW
... B. field lines are close together where the field is large C. field lines point away from a negatively charged particle D. a charged point particle released from rest moves along a field line E. none of these are correct ...
... B. field lines are close together where the field is large C. field lines point away from a negatively charged particle D. a charged point particle released from rest moves along a field line E. none of these are correct ...
Structure of Neutron Stars
... Study of close binary systems gives an opportunity to obtain mass estimate for progenitors of NSs (see for example, Ergma, van den Heuvel 1998 A&A 331, L29). For example, an interesting estimate was obtained for GX 301-2. The progenitor mass is >50 solar masses. On the other hand, for several other ...
... Study of close binary systems gives an opportunity to obtain mass estimate for progenitors of NSs (see for example, Ergma, van den Heuvel 1998 A&A 331, L29). For example, an interesting estimate was obtained for GX 301-2. The progenitor mass is >50 solar masses. On the other hand, for several other ...
How Stars Work: Ay 122 - Fall 2004 - Lecture 7
... laws / equations needed to describe structure: • Conservation of mass • Conservation of energy (at each radius, the change in the energy flux equals the local rate of energy release) • Equation of hydrostatic equilibrium (at each radius, forces due to pressure differences balance gravity) • Equation ...
... laws / equations needed to describe structure: • Conservation of mass • Conservation of energy (at each radius, the change in the energy flux equals the local rate of energy release) • Equation of hydrostatic equilibrium (at each radius, forces due to pressure differences balance gravity) • Equation ...
Questions 1 through 4 refer to the following scenario
... 14. A football is kicked a distance of 50 yards down field. Neglecting air resistance, which of the following statements would be INCORRECT when the football reaches its highest point. A) all of the ball's original kinetic energy has been changed into potential energy B) the ball's horizontal veloci ...
... 14. A football is kicked a distance of 50 yards down field. Neglecting air resistance, which of the following statements would be INCORRECT when the football reaches its highest point. A) all of the ball's original kinetic energy has been changed into potential energy B) the ball's horizontal veloci ...
