Hydrogen-Deficient Stars

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Hydrogen-Deficient Stars

description

Hydrogen-Deficient Stars. IAU Colloquium 87 “Hydrogen Deficient Stars and Related Objects” Mysore, India, 1985 Proceedings, 1986, eds. Hunger, Schönberner, N.K. Rao. Saio. Liebert. Schönberner. Lynas-Gray. Bues. Jeffery. Heber. N.K. Rao. “Hydrogen Deficient Stars” - PowerPoint PPT Presentation

Transcript of Hydrogen-Deficient Stars

Page 1: Hydrogen-Deficient Stars

Hydrogen-Deficient Stars

Page 2: Hydrogen-Deficient Stars

IAU Colloquium 87 “Hydrogen Deficient Stars and Related Objects”Mysore, India, 1985

Proceedings, 1986, eds. Hunger, Schönberner, N.K. Rao

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Saio

Liebert

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Lynas-Gray Schönberner

Bues

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N.K. Rao

JefferyHeber

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“Hydrogen Deficient Stars”Bamberg, Germany, 1995

Proceedings, 1996, eds. Jeffery, Heber

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Oxygen Deficient Atmospheres.ppt

Oxygen Deficient Atmospheres.ppt

wstsm.drmeganargo.net€¦  · Web viewThe science: Stars, like the Sun, are giant nuclear reactors. Stars are giant spherical balls of gas, mostly made of hydrogen. Deep in the

wstsm.drmeganargo.net€¦  · Web viewThe science: Stars, like the Sun, are giant nuclear reactors. Stars are giant spherical balls of gas, mostly made of hydrogen. Deep in the

Stars start out as a Nebula – A large diffuse cloud of gas mostly Hydrogen gas.

Stars start out as a Nebula – A large diffuse cloud of gas mostly Hydrogen gas.

Hydrogen-Deficient Stars: some statistics

Hydrogen-Deficient Stars: some statistics

AGB star intershell abundances inferred from analyses of extremely hot H-deficient post-AGB stars Klaus Werner Institut für Astronomie und Astrophysik.

AGB star intershell abundances inferred from analyses of extremely hot H-deficient post-AGB stars Klaus Werner Institut für Astronomie und Astrophysik.

Uli Heber Subluminous O stars Origin and evolutionary links Hydrogen-Deficient Stars, Tübingen 20.9.2007.

Uli Heber Subluminous O stars Origin and evolutionary links Hydrogen-Deficient Stars, Tübingen 20.9.2007.

Hydrogen Burning in Stars Wiescher... · 2019-11-13 · Hydrogen Burning in Stars Introduction to stellar evolution ... The stellar evolution, or subsequent evolutionary stages depend

Hydrogen Burning in Stars Wiescher... · 2019-11-13 · Hydrogen Burning in Stars Introduction to stellar evolution ... The stellar evolution, or subsequent evolutionary stages depend

Neutron stars radius measurements - Physics & …SoNS/speakers/Symposium/Guillot... · hydrogen atmosphere with L ... qLMXB is composed of pure hydrogen. H Photosphere ... NS in the

Neutron stars radius measurements - Physics & …SoNS/speakers/Symposium/Guillot... · hydrogen atmosphere with L ... qLMXB is composed of pure hydrogen. H Photosphere ... NS in the

Main Sequence Stars all stars fuse hydrogen into helium 90% of all stars, including our Sun, are main sequence stars range from high luminosity (brightness)

Main Sequence Stars all stars fuse hydrogen into helium 90% of all stars, including our Sun, are main sequence stars range from high luminosity (brightness)

The Elements Hydrogen - Calcium. Hydrogen The most abundant element in the universe. It is the fuel that burns in stars. It is the simplest element. Hydrogen.

The Elements Hydrogen - Calcium. Hydrogen The most abundant element in the universe. It is the fuel that burns in stars. It is the simplest element. Hydrogen.

Rag2-deficient IL-1 Receptor Antagonist-deficient …free-journal.umm.ac.id/files/file/Rag2-deficient IL-1...—Original— Rag2-deficient IL-1 Receptor Antagonist-deficient Mice Are

Rag2-deficient IL-1 Receptor Antagonist-deficient …free-journal.umm.ac.id/files/file/Rag2-deficient IL-1...—Original— Rag2-deficient IL-1 Receptor Antagonist-deficient Mice Are

Characteristics of Stars. Elements in Stars 99% Hydrogen (H) and Helium (He) 1-2% Oxygen, Carbon, Nitrogen, Calcium Sun is 70% Hydrogen and 28% Helium.

Characteristics of Stars. Elements in Stars 99% Hydrogen (H) and Helium (He) 1-2% Oxygen, Carbon, Nitrogen, Calcium Sun is 70% Hydrogen and 28% Helium.

Timescales 6 The evolution of stars - Homepageshomepages.abdn.ac.uk/nph120/Cosmol/cosmol6sum.pdf · Stellar evolution • Stars spend most of their life converting hydrogen to helium

Timescales 6 The evolution of stars - Homepageshomepages.abdn.ac.uk/nph120/Cosmol/cosmol6sum.pdf · Stellar evolution • Stars spend most of their life converting hydrogen to helium

The Birthplace of Stars The space between the stars is not completely empty. Thin clouds of hydrogen and helium, seeded with the “dust” from dying stars,

The Birthplace of Stars The space between the stars is not completely empty. Thin clouds of hydrogen and helium, seeded with the “dust” from dying stars,

Raw Done Right - WordPress.com€¦ · Why many fresh food diets are deficient Deficient soil = deficient crops = deficient animals Factory farms vs. happy healthy outdoor animals

Raw Done Right - WordPress.com€¦ · Why many fresh food diets are deficient Deficient soil = deficient crops = deficient animals Factory farms vs. happy healthy outdoor animals

Stars start out as a Nebula – A large diffuse cloud of gas mostly Hydrogen gas

Stars start out as a Nebula – A large diffuse cloud of gas mostly Hydrogen gas

Properties of stars during hydrogen burning Hydrogen burning is first major hydrostatic burning phase of a star: Hydrostatic equilibrium: a fluid element.

Properties of stars during hydrogen burning Hydrogen burning is first major hydrostatic burning phase of a star: Hydrostatic equilibrium: a fluid element.

Seriously Deficient

Seriously Deficient

STARS BALL OF GASES, MOSTLY HYDROGEN AND HELIUM Are all stars the same color? NO! Color- determined by surface temperature.

STARS BALL OF GASES, MOSTLY HYDROGEN AND HELIUM Are all stars the same color? NO! Color- determined by surface temperature.

Deficient Mice

Deficient Mice