Test 3
Science 1301 with Lehr at Baylor University
About this deck
By: Hilary Lewis
Created: 2011-04-04
Size: 39 flashcards
Views: 13
Created: 2011-04-04
Size: 39 flashcards
Views: 13
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Star
A glowing ball of gas held together by its gravity and powered by nuclear fusion
Radius of Sun
100 Earth Radii
1 million earths to fill the sun
Surface Temp
About 6000K
Chemical Composition of Sun
Hydrogen and Helium
Structure of Sun: order from interior out
Core
Radiation Zone
Convection Zone
Photosphere
Chromosphere
Corona
Suns Core
Fusion in core
10 million degrees
Radiation Zone
Get out by radiation
Convection Zone
Transported by convection
Photosphere
what we see and call the surface
Chromosphere
regions above the surface
Corona
Regions above surface
Helioseismology
Study of vibrations on the Sun as whole
Solar Interior
Observe directly
Use temperature and pressures to predict Temp of Sun
Questions about interior of sun
1. Where is the energy produced (where fusion is occurring and elements involved)?
2. how energy get to surface of the sun (which makes the sun shine)?
Core Temp of Sun
15 million K
Sunspots
Dark regions in photosphere
Appear darker because they are cooler than the surrounding gases
Sunspot Cycle
an 11 year cycle
number of sun spots reach a max and min
Solar Cycle
22 year cycle
magnetic pole reverse and return to their original configuration
Luminosity
intrinsic property of a star
doesn't depend on the location or motion of observer
Stars absolut brightness
Brightness
amount of energy striking per unit area per unit time of some light sensitive surface
what we can measure directly
Radius
know luminosity and temperature
stefans law
Temperature
wien's law
Mass
keplers 3rd law
binary stars
Standard candle techniques
brightness is related to luminosity by an inverse square law
brightness=luminosity/(4*Pi*Distance^2)
Apparent Magnitude
Brightness of stars
difference of 5=factor of 100higher the number, dimmer the star
Absolute magnitude
Luminosity of a star
How is mass of a star determined?
binary stars
keplers 3rd law
Cepheid Variable
estimated from stars period of variation
Planetary nebula
low mass dies
our sun is a low mass star
an explosion
Nova
not a normal life cycle
needs a white dwarf in binary star system orbiting and close enough to have explosion
Material pulled of a hydrogen then fuses
Supernova
types 1a and II
not a normal life cycle of star
II normal life cycle white dwarf
mass up to 1.4X mass of sun
releases energy and blows self apart
Type 1a supernova
low mass star
neutron star
high mass star
black hole
high mass stars
About this deck
By: Hilary Lewis
Created: 2011-04-04
Size: 39 flashcards
Views: 13
Created: 2011-04-04
Size: 39 flashcards
Views: 13
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
Naj