Below is the list of arrivals and departures of those in residence at the INT, which occurred as of Monday July 9, in comparison with this previous posting.
Arrivals: Deborah Aguilera (Alicante) Ed Brown (MSU; returning), Randall Cooper (Harvard; returning), Barry Davids (TRIUMF), Huaiyu Duan (UCSD), Pawel Haensel (Copernicus), Alex Potekhin (Ioffe), Achim Schwenk (TRIUMF; returning)
Remaining: Andrew Cumming (McGill), Lirio Aparicio (UNAM), Michael Forbes (UW), Janusz Gil (Kepler Institute), Jillian Anne Henderson (UNAM), Charles Horowitz (Indiana U), Zachary Medin (Cornell), George Melikidze (University of Zielona Gora), Dany Page (UNAM), George Pavlov (PSU), Madappa Prakash (Ohio), Bob Rutledge (McGill), Nicolai Sandulescu (Institute of Atomic Physics)
Departures: Liliana Caballero (Indiana U), Sanjib Gupta (LANL), Jim Lattimer (SUNY), Kseniya Levenfish (Ioffe), Peter Moller (LANL), Jorge Piekarewicz (Florida State), Sergey Postnikov (Ohio), Sanjay Reddy (LANL), Alex Turbiner (UNAM), Roberto Turolla (INFN Padova).
Friday, July 6, 2007
Thursday, July 5, 2007
Next Week's Talks
Monday, July 9
10:30. C421. Zach Medin (Cornell)
Condensed Matter Surfaces of Neutron Stars: Applications and Tangents
Tuesday, July 10
10:30. C421. A. Potekhin (Ioffe)
Thermal structure of magnetized neutron star envelopes
Wednesday, July 11
10:30. C421. Pawel Haensel (Copernicus)
Deep crustal heating in accreting neutron stars
Thursday, July 12.
Mini-Workshop: Nuclear Reactions in Type I X-ray Bursts. C421.
10:30. Barry Davids (TRIUMF). Experimental Efforts to Determine the 15O(a,g)19Ne Reaction Rate
11:15. Chris Ruiz (TRIUMF). Nuclear Astrophysics of neutron-deficient nuclei - experimental
2:00. Ed Brown (MSU, JINA). The X-ray Burst—Crust Connection
2:30. Andrew Cumming (McGill). Constraints on the rp-process from X-ray Bursts
3:00. Randall Cooper (Harvard/CfA). Nuclear Reactions During the Onset of Type I X-ray Bursts
3:30-5:00 Coffee & Discussion
Friday, July 12.
10:30. C421. Madappa Prakash (Ohio U.)
Discussion: Hot Topics in The Neutron Star Crust and Surface
10:30. C421. Zach Medin (Cornell)
Condensed Matter Surfaces of Neutron Stars: Applications and Tangents
Tuesday, July 10
10:30. C421. A. Potekhin (Ioffe)
Thermal structure of magnetized neutron star envelopes
Wednesday, July 11
10:30. C421. Pawel Haensel (Copernicus)
Deep crustal heating in accreting neutron stars
Thursday, July 12.
Mini-Workshop: Nuclear Reactions in Type I X-ray Bursts. C421.
10:30. Barry Davids (TRIUMF). Experimental Efforts to Determine the 15O(a,g)19Ne Reaction Rate
11:15. Chris Ruiz (TRIUMF). Nuclear Astrophysics of neutron-deficient nuclei - experimental
2:00. Ed Brown (MSU, JINA). The X-ray Burst—Crust Connection
2:30. Andrew Cumming (McGill). Constraints on the rp-process from X-ray Bursts
3:00. Randall Cooper (Harvard/CfA). Nuclear Reactions During the Onset of Type I X-ray Bursts
3:30-5:00 Coffee & Discussion
Friday, July 12.
10:30. C421. Madappa Prakash (Ohio U.)
Discussion: Hot Topics in The Neutron Star Crust and Surface
Crosstalk
O.L. Caballero. Transport Properties of Dense Plasmas. We are calculating transport properties of the ions in the Neutron star crust using MD simulations. In our model the ions interact via a Yukawa potential. We obtained the thermal conductivity, diffusion coefficient and shear viscosity for a density range between 10^9 to 10^13 gm/cm^3. We expect to match results coming from quantum calculations by Prakash and Postnikov for the dilute gas. In the future we expect to generate results for the nuclear pasta phase.
Neutrino Emission due to Cooper Pair Breaking and Formation (PBF): Clarification
One of the conclusions of my talk during the workshop was that the PBF rate in the vector channel is highly suppressed by a factor of V_F^4 (about 10_as described in the paper by Leinson and Perez (2006). Sedrakian and collaborators have revisted the problem. They also find the rate is suppressed relative to the calculation by Flowers, Sutherland and Ruderman by a factor of about 4 *10^-3 at densities of relevance to the crust.
Crosstalk
From Friday, June 29th:
Jean in' t Zand. Observations of Rare and Peculiar X-ray Bursts.
Many of the details of X-ray bursts are not understood, and many of these may have nuclear physics explanations.
Randy Cooper. Generation of Type 1 X-ray Burst Oscillations.
For nuclear theorists: These oscillations are exciting for nuclear theorists, because they can constrain neutron star compactness, and so contain information about the nuclear EOS, in a way which is complementary and independent of methods heard this week.
Erik Kuulkers. INTEGRAL Galactic Bulge Monitoring Program.
For nuclear theorists: the high energy sky changes from time to time.
Fang Peng. Weak Hydrogen-Powered Explosions on Accreting Neutron Stars.
For Nuclear theorists: X-ray burst modeling depends on the heating from the crust.
For Astronomical observers: Observations of the following phenomena would be useful in constraining burst models: X-ray bursts in low-luminosity sources, search for long bursts, weak H flashes, or peculiar bursts, need high resolution light curves.
Andrew Cumming. Nuclear Burning on Accreting Nuetron Stars.
For nuclear theorists: people working the proton rich side, particularly on rp-processes, we need to understand the timescales for the different processes in rp-process burning. Also on the neutron rich side, we need to understand the crustal processes which produce the heat flux at the base of the crust, to help us explain KS 1731-260.
A problem: H and He is clearly burning stably at 0.1-0.2 of the Eddington accretion rate (i.e., at low temperature in the atmosphere); but we expect to only burn stably at accretion rates at the Eddington rate (at a much higher temperature in the atmosphere). How is it able to burn stably at such a low accretion rate?
Sudip Bhattacharyya. Probing Neutron Star Physics Using Thermonuclear X-ray Bursts. For nuclear theorists: produce mass-radius relationships using only up-to-date physics for neutron stars, strange stars and hybrid stars (quark cores, normal matter in the atmosphere/crust). In other words, please specify which models have outlived their assumptions.
Jean in' t Zand. Observations of Rare and Peculiar X-ray Bursts.
Many of the details of X-ray bursts are not understood, and many of these may have nuclear physics explanations.
Randy Cooper. Generation of Type 1 X-ray Burst Oscillations.
For nuclear theorists: These oscillations are exciting for nuclear theorists, because they can constrain neutron star compactness, and so contain information about the nuclear EOS, in a way which is complementary and independent of methods heard this week.
Erik Kuulkers. INTEGRAL Galactic Bulge Monitoring Program.
For nuclear theorists: the high energy sky changes from time to time.
Fang Peng. Weak Hydrogen-Powered Explosions on Accreting Neutron Stars.
For Nuclear theorists: X-ray burst modeling depends on the heating from the crust.
For Astronomical observers: Observations of the following phenomena would be useful in constraining burst models: X-ray bursts in low-luminosity sources, search for long bursts, weak H flashes, or peculiar bursts, need high resolution light curves.
Andrew Cumming. Nuclear Burning on Accreting Nuetron Stars.
For nuclear theorists: people working the proton rich side, particularly on rp-processes, we need to understand the timescales for the different processes in rp-process burning. Also on the neutron rich side, we need to understand the crustal processes which produce the heat flux at the base of the crust, to help us explain KS 1731-260.
A problem: H and He is clearly burning stably at 0.1-0.2 of the Eddington accretion rate (i.e., at low temperature in the atmosphere); but we expect to only burn stably at accretion rates at the Eddington rate (at a much higher temperature in the atmosphere). How is it able to burn stably at such a low accretion rate?
Sudip Bhattacharyya. Probing Neutron Star Physics Using Thermonuclear X-ray Bursts. For nuclear theorists: produce mass-radius relationships using only up-to-date physics for neutron stars, strange stars and hybrid stars (quark cores, normal matter in the atmosphere/crust). In other words, please specify which models have outlived their assumptions.
Wednesday, July 4, 2007
That's the question
If you suddenly find yourself awake at night and
frantically try to remember what that crucial question
(or quest in my opinion) was, well, now you can
here it over and over again, and you'll never
forget: Bob's quest.
Enjoy!
frantically try to remember what that crucial question
(or quest in my opinion) was, well, now you can
here it over and over again, and you'll never
forget: Bob's quest.
Enjoy!
Tuesday, July 3, 2007
July 4th Party
Prakash and Dany Page invite program participants to a July 4th party at their place:
July 4th Party and BBQ.
3pm-
Madappa Prakash and Dany Page
4227 Dayton Ave.
(Intersecton of 42nd St. & Fremont Ave, leads to Daton Ave).
Ph: (206)632-5055CORRECTION 634 0515.
Please feel free to bring: whatever you like, though basic BBQ meats and beer will be present (check with Dany and Prakash).
Directions.
Bus #44 on 45th St. is useful, but it will follow the Sunday schedule due to the holiday.
Monday, July 2, 2007
Crosstalk
J. Henderson - Solving the Mysteries of Ultra-Magnetized Neutron Stars - Heat Transport inside the Crust.
The addition of a toroidal component to the crustal field can sufficiently reduce the radius of the hot emitting areas on the NS surface to possibly explain some observations (i.e. "The Magnificent Seven").
To Observational Astronomers: Keep doing what you're doing.
Alexandros Gezerlis - Neutron Star Matter Superfluidity: from BCS to QMC.
Microscopic simulations of the 1S0 zero-temperature neutron-matter pairing gap show it to be larger than that calculated within all the previous formalisms.
To Observational Astronomers: to quote Chuck Horowitz, "Astronomers should ask nuclear physicists two questions: (1) Are your results model dependent, and (2) What are your theoretical error bars?"
The addition of a toroidal component to the crustal field can sufficiently reduce the radius of the hot emitting areas on the NS surface to possibly explain some observations (i.e. "The Magnificent Seven").
To Observational Astronomers: Keep doing what you're doing.
Alexandros Gezerlis - Neutron Star Matter Superfluidity: from BCS to QMC.
Microscopic simulations of the 1S0 zero-temperature neutron-matter pairing gap show it to be larger than that calculated within all the previous formalisms.
To Observational Astronomers: to quote Chuck Horowitz, "Astronomers should ask nuclear physicists two questions: (1) Are your results model dependent, and (2) What are your theoretical error bars?"
Talks This Week
Monday July 2
10:30. C421. J. Henderson (UAM). Solving the Mysteries of Ultra-Magnetized Neutron Stars?
and A. Gezerlis (LANL). Neutron Star Matter Superfluidity: from BCS to QMC. Each 30 min + 15 min for questions.
Tuesday, July 3
10:30. C421. P. Moller (LANL) Large-scale calculations of nuclear-structure data for simulation data bases
and Sanjib Gupta (LANL). Composition dependence of Neutron Star Deep Crust Crustal Heating.
Wednesday, July 4
Holiday. INT Closed.
Thursday, July 5
10:30. C421. Sergey Postnikov (Ohio). Thermal and Transport Properties of a Non-Relativistic Quantum System
and Liliana Caballero (Indiana U). Transport Properties of Dense Plasmas
Friday, July 6
10:30. C421. George Melikidze (University of Zielona Gora). Partially Screened Polar Gap and its Observational Consequences
and Janusz Gil (J. Kepler Institute of Astronomy). X-ray Pulsar Radiation from Hot Polar Caps Heated by Back-Flow Bombardment.
10:30. C421. J. Henderson (UAM). Solving the Mysteries of Ultra-Magnetized Neutron Stars?
and A. Gezerlis (LANL). Neutron Star Matter Superfluidity: from BCS to QMC. Each 30 min + 15 min for questions.
Tuesday, July 3
10:30. C421. P. Moller (LANL) Large-scale calculations of nuclear-structure data for simulation data bases
and Sanjib Gupta (LANL). Composition dependence of Neutron Star Deep Crust Crustal Heating.
Wednesday, July 4
Holiday. INT Closed.
Thursday, July 5
10:30. C421. Sergey Postnikov (Ohio). Thermal and Transport Properties of a Non-Relativistic Quantum System
and Liliana Caballero (Indiana U). Transport Properties of Dense Plasmas
Friday, July 6
10:30. C421. George Melikidze (University of Zielona Gora). Partially Screened Polar Gap and its Observational Consequences
and Janusz Gil (J. Kepler Institute of Astronomy). X-ray Pulsar Radiation from Hot Polar Caps Heated by Back-Flow Bombardment.
Arrivals and Departures
Below is the list of arrivals and departures of those in residence at the INT, which occurred as of Monday July 2, in comparison with this previous posting.
Arrivals: Lirio Aparicio (UNAM), Liliana Caballero (Indiana U), Andrew Cumming (McGill), Alex Gezerlis (LANL), Janusz Gil (Kepler Institute), Sanjib Gupta (LANL), Jillian Anne Henderson (UNAM), Charles Horowitz (Indiana U), Jim Lattimer (SUNY Stony Brook), Kseniya Levenfish (Ioffe), Zachary Medin (Cornell), George Mlikidze (University of Zielona Gora), Peter Moller (LANL), George Pavlov (PSU), Jorge Piekarewicz (Florida State), Sergey Postnikov (Ohio), Madappa Prakash (Ohio), Sanjay Reddy (LANL), Nikolai Sandulescu (Institute of Atomic Physics), Alex Turbiner (UNAM), Roberto Turolla (INFN Padova).
Departures: Werner Becker, Chris Fryer, Aimee Hungerford, Jerome Margueron, Vyatcheslav Zavlin, Joseph Carlson.
Arrivals: Lirio Aparicio (UNAM), Liliana Caballero (Indiana U), Andrew Cumming (McGill), Alex Gezerlis (LANL), Janusz Gil (Kepler Institute), Sanjib Gupta (LANL), Jillian Anne Henderson (UNAM), Charles Horowitz (Indiana U), Jim Lattimer (SUNY Stony Brook), Kseniya Levenfish (Ioffe), Zachary Medin (Cornell), George Mlikidze (University of Zielona Gora), Peter Moller (LANL), George Pavlov (PSU), Jorge Piekarewicz (Florida State), Sergey Postnikov (Ohio), Madappa Prakash (Ohio), Sanjay Reddy (LANL), Nikolai Sandulescu (Institute of Atomic Physics), Alex Turbiner (UNAM), Roberto Turolla (INFN Padova).
Departures: Werner Becker, Chris Fryer, Aimee Hungerford, Jerome Margueron, Vyatcheslav Zavlin, Joseph Carlson.
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