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PSW 2330 Heart of Darkness, Dark Matter, Dark Energy | Jeremiah Ostriker
Lecture Starts at 15:20
Friday, March 7, 2014
Jeremiah P. Ostriker
Charles A. Young Professor Emeritus, Astrophysical Sciences Dept., Princeton University
This lecture explored the history and the physics of our current model of the universe: How did structure in the universe arise, how has it evolved, and what is its ultimate fate?
published: 31 Mar 2014
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Jeremiah P. Ostriker - 2000 National Medal of Science
published: 26 Oct 2015
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Jeremiah P. Ostriker Talk on Modern Cosmism Conference NYC 10/10/15
Current Scientific Understanding of the Nature, Origin and Future of the Universe
published: 20 Oct 2015
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Jeremiah P. Ostriker- National Medal of Science 2000
LINKS:
http://www.evolvingcom.com/
https://www.facebook.com/evolvingcommunications
https://www.linkedin.com/company/evolving-communications
https://vimeo.com/evolvingcommunications
published: 10 Jul 2018
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ON THE FORMATION OF MASSIVE GALAXIES
A seminar by Jeremiah Ostriker, in the frame of the weekly held Institut d'astrophysique de Paris' specialised seminars, on Friday, May 13, 2011, invited by Roya Mohayaee-Colin.
Abstract:
Looking backwards we have been able to reconstruct from the detailed structure of our own Galaxy and from the fossil evidence derived from the study of nearby galaxies a plausible history of how galaxies formed over the last several billion years. In addition, now that we have a quite definite cosmological model, providing us with a quantitative picture of how perturbations grew from very low amplitude Gaussian fluctuations, we can perform the forward modeling of representative pieces of the universe using standard physical processes to see how well we match our local knowledge and the time-reversed mod...
published: 28 Feb 2019
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Jeremiah P. Ostriker | Wikipedia audio article
This is an audio version of the Wikipedia Article:
Jeremiah P. Ostriker
Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.
Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain
Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.
You can find other Wikipedia audio artic...
published: 22 Nov 2018
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Public Lecture of Prof. Jeremiah OSTRIKER at MG15 - Rome, July 2018
TALK: Ultra-light scalars as cosmological dark matter
ABSTRACT: The nature of the primary constituent of cosmological dark matter remains unknown. The Cold Dark Matter ("CDM") paradigm fits all high redshift and all large- scale observations with accuracy, but on scales of several kpc or less the CDM model runs into difficulties, and direct detection of CDM particles has been without success. However, if the dark matter is comprised of ultra-light bosons with mass of roughly 10-22 eV and de-Broglie wavelength typically of order 1kpc, all large-scale phenomena are the same as with CDM but small-scale problems are alleviated in this model which is sometimes called Fuzzy Dark Matter ("FDM"). Low mass halos and galaxies are less abundant, alleviating the "two big to fail" galaxy problem and t...
published: 12 Oct 2018
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Jerry Ostriker
This interview is featured as part of a course available at https://www.arewealone.us/ #Astrobiology #AreWeAlone
published: 04 Oct 2021
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BHI Conference, May 8, 2017 | Session 4: Supermassive Black Holes
Session 4: Supermassive Black Holes
Session Chair: Avi Loeb
Chung-Pei Ma: Supermassive Black Hole and Galaxy Coevolution?
Jeremiah Ostriker: Black Hole Accretion: The Generality of Inflow-Outflow Solutions
Marta Volonteri: The Feeding Cycle of Massive Black Holes
Zoltan Haiman: Dirty Black Hole Mergers
published: 09 Jun 2017
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7.4.2 Jerry Ostriker: astrophysicist
Jerry is convinced it is extremely unlikely that we are alone. The astronomical terms of the Drake equation are now pretty well known. He posits nasty aliens who prevent other life forms from developing. Our radio signals have only gone about a hundred light years away. When they have traveled a thousand light years (and are received by the nasty aliens) we better watch out.
published: 04 Oct 2021
1:47:05
PSW 2330 Heart of Darkness, Dark Matter, Dark Energy | Jeremiah Ostriker
Lecture Starts at 15:20
Friday, March 7, 2014
Jeremiah P. Ostriker
Charles A. Young Professor Emeritus, Astrophysical Sciences Dept., Princeton University
Thi...
Lecture Starts at 15:20
Friday, March 7, 2014
Jeremiah P. Ostriker
Charles A. Young Professor Emeritus, Astrophysical Sciences Dept., Princeton University
This lecture explored the history and the physics of our current model of the universe: How did structure in the universe arise, how has it evolved, and what is its ultimate fate?
https://wn.com/Psw_2330_Heart_Of_Darkness,_Dark_Matter,_Dark_Energy_|_Jeremiah_Ostriker
Lecture Starts at 15:20
Friday, March 7, 2014
Jeremiah P. Ostriker
Charles A. Young Professor Emeritus, Astrophysical Sciences Dept., Princeton University
This lecture explored the history and the physics of our current model of the universe: How did structure in the universe arise, how has it evolved, and what is its ultimate fate?
- published: 31 Mar 2014
- views: 857
1:02
Jeremiah P. Ostriker- National Medal of Science 2000
LINKS:
http://www.evolvingcom.com/
https://www.facebook.com/evolvingcommunications
https://www.linkedin.com/company/evolving-communications
https://vimeo.com/ev...
LINKS:
http://www.evolvingcom.com/
https://www.facebook.com/evolvingcommunications
https://www.linkedin.com/company/evolving-communications
https://vimeo.com/evolvingcommunications
https://wn.com/Jeremiah_P._Ostriker_National_Medal_Of_Science_2000
LINKS:
http://www.evolvingcom.com/
https://www.facebook.com/evolvingcommunications
https://www.linkedin.com/company/evolving-communications
https://vimeo.com/evolvingcommunications
- published: 10 Jul 2018
- views: 37
51:52
ON THE FORMATION OF MASSIVE GALAXIES
A seminar by Jeremiah Ostriker, in the frame of the weekly held Institut d'astrophysique de Paris' specialised seminars, on Friday, May 13, 2011, invited by Roy...
A seminar by Jeremiah Ostriker, in the frame of the weekly held Institut d'astrophysique de Paris' specialised seminars, on Friday, May 13, 2011, invited by Roya Mohayaee-Colin.
Abstract:
Looking backwards we have been able to reconstruct from the detailed structure of our own Galaxy and from the fossil evidence derived from the study of nearby galaxies a plausible history of how galaxies formed over the last several billion years. In addition, now that we have a quite definite cosmological model, providing us with a quantitative picture of how perturbations grew from very low amplitude Gaussian fluctuations, we can perform the forward modeling of representative pieces of the universe using standard physical processes to see how well we match our local knowledge and the time-reversed modeling based on the fossil evidence. Finally, we can employ large ground and space based telescopes to use the universe as a time-machine – directly observing the past history of our light-cone. While none of these approaches can give us at the present time results accurate to more than roughly the 5% to 10% level, a coherent and plausible picture is emerging.
Massive galaxies from in two phases. In the first phase, which peaks at redshift z = 6 and ends by redshift z = 2, cold gas streams in, making stars in a small (less than 1kpc) region. But, as the stellar mass approaches 1011 Msolar, a hot bubble forms which suppresses further inflow of cold gas. Then from redshift z = 3 to the present time, small stellar satellite systems are accreted at typically 10kpc from the center and the size of the total system grows by about a factor of three as the mass doubles. This added, accreted component is mainly comprised of old and low metallicity stars. Energy release from gravitational infall in various forms will terminate star-formation even in the absence of feedback from SN or MBHs. This physical picture seems naturally to lead to the mass, size, scale and epoch of galaxy formation and, increasingly, to a first understanding of the detailed internal structure of these systems.
Check out Jeremiah Ostriker's Wikipedia web page: https://fr.wikipedia.org/wiki/Jeremiah_Ostriker
https://wn.com/On_The_Formation_Of_Massive_Galaxies
A seminar by Jeremiah Ostriker, in the frame of the weekly held Institut d'astrophysique de Paris' specialised seminars, on Friday, May 13, 2011, invited by Roya Mohayaee-Colin.
Abstract:
Looking backwards we have been able to reconstruct from the detailed structure of our own Galaxy and from the fossil evidence derived from the study of nearby galaxies a plausible history of how galaxies formed over the last several billion years. In addition, now that we have a quite definite cosmological model, providing us with a quantitative picture of how perturbations grew from very low amplitude Gaussian fluctuations, we can perform the forward modeling of representative pieces of the universe using standard physical processes to see how well we match our local knowledge and the time-reversed modeling based on the fossil evidence. Finally, we can employ large ground and space based telescopes to use the universe as a time-machine – directly observing the past history of our light-cone. While none of these approaches can give us at the present time results accurate to more than roughly the 5% to 10% level, a coherent and plausible picture is emerging.
Massive galaxies from in two phases. In the first phase, which peaks at redshift z = 6 and ends by redshift z = 2, cold gas streams in, making stars in a small (less than 1kpc) region. But, as the stellar mass approaches 1011 Msolar, a hot bubble forms which suppresses further inflow of cold gas. Then from redshift z = 3 to the present time, small stellar satellite systems are accreted at typically 10kpc from the center and the size of the total system grows by about a factor of three as the mass doubles. This added, accreted component is mainly comprised of old and low metallicity stars. Energy release from gravitational infall in various forms will terminate star-formation even in the absence of feedback from SN or MBHs. This physical picture seems naturally to lead to the mass, size, scale and epoch of galaxy formation and, increasingly, to a first understanding of the detailed internal structure of these systems.
Check out Jeremiah Ostriker's Wikipedia web page: https://fr.wikipedia.org/wiki/Jeremiah_Ostriker
- published: 28 Feb 2019
- views: 133
2:58
Jeremiah P. Ostriker | Wikipedia audio article
This is an audio version of the Wikipedia Article:
Jeremiah P. Ostriker
Listening is a more natural way of learning, when compared to reading. Written langu...
This is an audio version of the Wikipedia Article:
Jeremiah P. Ostriker
Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.
Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain
Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.
You can find other Wikipedia audio articles too at:
https://www.youtube.com/channel/UCuKfABj2eGyjH3ntPxp4YeQ
You can upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
"The only true wisdom is in knowing you know nothing."
- Socrates
SUMMARY
=======
Jeremiah Paul "Jerry" Ostriker (born April 13, 1937) is an astrophysicist and a professor of astronomy at Columbia University and is the Charles A. Young Professor Emeritus at Princeton where he also continues as a Senior Research Scholar. Ostriker has also served as a university administrator as Provost of Princeton University.
https://wn.com/Jeremiah_P._Ostriker_|_Wikipedia_Audio_Article
This is an audio version of the Wikipedia Article:
Jeremiah P. Ostriker
Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.
Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain
Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.
You can find other Wikipedia audio articles too at:
https://www.youtube.com/channel/UCuKfABj2eGyjH3ntPxp4YeQ
You can upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
"The only true wisdom is in knowing you know nothing."
- Socrates
SUMMARY
=======
Jeremiah Paul "Jerry" Ostriker (born April 13, 1937) is an astrophysicist and a professor of astronomy at Columbia University and is the Charles A. Young Professor Emeritus at Princeton where he also continues as a Senior Research Scholar. Ostriker has also served as a university administrator as Provost of Princeton University.
- published: 22 Nov 2018
- views: 10
34:24
Public Lecture of Prof. Jeremiah OSTRIKER at MG15 - Rome, July 2018
TALK: Ultra-light scalars as cosmological dark matter
ABSTRACT: The nature of the primary constituent of cosmological dark matter remains unknown. The Cold Dar...
TALK: Ultra-light scalars as cosmological dark matter
ABSTRACT: The nature of the primary constituent of cosmological dark matter remains unknown. The Cold Dark Matter ("CDM") paradigm fits all high redshift and all large- scale observations with accuracy, but on scales of several kpc or less the CDM model runs into difficulties, and direct detection of CDM particles has been without success. However, if the dark matter is comprised of ultra-light bosons with mass of roughly 10-22 eV and de-Broglie wavelength typically of order 1kpc, all large-scale phenomena are the same as with CDM but small-scale problems are alleviated in this model which is sometimes called Fuzzy Dark Matter ("FDM"). Low mass halos and galaxies are less abundant, alleviating the "two big to fail" galaxy problem and the absence of dark matter cusps is understood as well as other dynamical issues in low mass systems. Tests based on the Lyman-α forest and delayed high redshift galaxy formation will provide critical means to evaluate the FDM paradigm.
https://wn.com/Public_Lecture_Of_Prof._Jeremiah_Ostriker_At_Mg15_Rome,_July_2018
TALK: Ultra-light scalars as cosmological dark matter
ABSTRACT: The nature of the primary constituent of cosmological dark matter remains unknown. The Cold Dark Matter ("CDM") paradigm fits all high redshift and all large- scale observations with accuracy, but on scales of several kpc or less the CDM model runs into difficulties, and direct detection of CDM particles has been without success. However, if the dark matter is comprised of ultra-light bosons with mass of roughly 10-22 eV and de-Broglie wavelength typically of order 1kpc, all large-scale phenomena are the same as with CDM but small-scale problems are alleviated in this model which is sometimes called Fuzzy Dark Matter ("FDM"). Low mass halos and galaxies are less abundant, alleviating the "two big to fail" galaxy problem and the absence of dark matter cusps is understood as well as other dynamical issues in low mass systems. Tests based on the Lyman-α forest and delayed high redshift galaxy formation will provide critical means to evaluate the FDM paradigm.
- published: 12 Oct 2018
- views: 119
38:50
Jerry Ostriker
This interview is featured as part of a course available at https://www.arewealone.us/ #Astrobiology #AreWeAlone
This interview is featured as part of a course available at https://www.arewealone.us/ #Astrobiology #AreWeAlone
https://wn.com/Jerry_Ostriker
This interview is featured as part of a course available at https://www.arewealone.us/ #Astrobiology #AreWeAlone
- published: 04 Oct 2021
- views: 162
1:51:20
BHI Conference, May 8, 2017 | Session 4: Supermassive Black Holes
Session 4: Supermassive Black Holes
Session Chair: Avi Loeb
Chung-Pei Ma: Supermassive Black Hole and Galaxy Coevolution?
Jeremiah Ostriker: Black Hole Accreti...
Session 4: Supermassive Black Holes
Session Chair: Avi Loeb
Chung-Pei Ma: Supermassive Black Hole and Galaxy Coevolution?
Jeremiah Ostriker: Black Hole Accretion: The Generality of Inflow-Outflow Solutions
Marta Volonteri: The Feeding Cycle of Massive Black Holes
Zoltan Haiman: Dirty Black Hole Mergers
https://wn.com/Bhi_Conference,_May_8,_2017_|_Session_4_Supermassive_Black_Holes
Session 4: Supermassive Black Holes
Session Chair: Avi Loeb
Chung-Pei Ma: Supermassive Black Hole and Galaxy Coevolution?
Jeremiah Ostriker: Black Hole Accretion: The Generality of Inflow-Outflow Solutions
Marta Volonteri: The Feeding Cycle of Massive Black Holes
Zoltan Haiman: Dirty Black Hole Mergers
- published: 09 Jun 2017
- views: 161
6:52
7.4.2 Jerry Ostriker: astrophysicist
Jerry is convinced it is extremely unlikely that we are alone. The astronomical terms of the Drake equation are now pretty well known. He posits nasty aliens wh...
Jerry is convinced it is extremely unlikely that we are alone. The astronomical terms of the Drake equation are now pretty well known. He posits nasty aliens who prevent other life forms from developing. Our radio signals have only gone about a hundred light years away. When they have traveled a thousand light years (and are received by the nasty aliens) we better watch out.
https://wn.com/7.4.2_Jerry_Ostriker_Astrophysicist
Jerry is convinced it is extremely unlikely that we are alone. The astronomical terms of the Drake equation are now pretty well known. He posits nasty aliens who prevent other life forms from developing. Our radio signals have only gone about a hundred light years away. When they have traveled a thousand light years (and are received by the nasty aliens) we better watch out.
- published: 04 Oct 2021
- views: 81