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AST 203 > Stellar Death > Flashcards

Stellar Death Flashcards

1
Q

(Outcome of stellar evolution) the star explodes, ejecting all of its matter into interstellar medium

A

Nothing/recycling

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2
Q

(Outcome of stellar evolution) degenerate core stays and slowly cools and fade

A

White dwarf

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3
Q

(Outcome of stellar evolution) extremely compact core stays behind when star explodes - will eventually fade

A

Neutron star

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4
Q

(Outcome of stellar evolution) singularity/point of infinite curvature left behind when star goes supernova

A

Black hole

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5
Q

(Supernovae) shows no hydrogen in their spectrum

A

Type I

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6
Q

(Supernovae) strong hydrogen in spectrum

A

Type II

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7
Q

(Supernovae) strong silicon

A

Type Ia

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8
Q

(Supernovae) He rich

A

Type Ib

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9
Q

(Supernovae) He poor

A

Type Ic

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10
Q

Luminosity/magnitude vs. time

A

Lightcurve

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11
Q

Star begins to collapse once core (degenerate) is iron (Fe) and no white dwarf or planetary nebula is left

A

Core-collapse supernovae

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12
Q

Photons break apart heavy nuclei

A

Photodisintegration

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13
Q

Escaping neutrinos cool the star as it collapses

A

Proto-neutron star

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14
Q

What powers supernovae

A

gravitational energy released from core collapse

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15
Q

Compressed neutrons will exert

A

Neutron degeneracy pressure

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16
Q

Rapidly spinning neutron stars that emit electromagnetic radiation

A

Pulsars

17
Q

Electromagnetic radiation when charges follow curved path (non-thermal)

A

Synchrotron radiation

18
Q

Spherically symmetric distribution of older stars

A

Halo

19
Q

Distribution of stars orbiting galactic center on thin plane (pulsar dense)

A

Disk

20
Q

Spherical distribution surrounding galactic center

A

Bulge

21
Q

Beamed emission from poles of neutron star

A

Pulsar

22
Q

Boundary beyond which light cannot escape black hole

A

Event horizon

AST 203 (12 decks)

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