Cooling Delays from Iron Sedimentation and Iron Inner Cores in White Dwarfs

Autor: M. E. Caplan, Andrew Cumming, Charles Horowitz, Earl P. Bellinger, I. F. Freeman

Publikováno v: Caplan, M E, Freeman, I F, Horowitz, C J, Cumming, A & Bellinger, E P 2021, ' Cooling Delays from Iron Sedimentation and Iron Inner Cores in White Dwarfs ', Astrophysical Journal Letters, vol. 919, no. 1, L12 . https://doi.org/10.3847/2041-8213/ac1f99

Do white dwarfs have inner cores made of iron? Neutron rich nuclei like $^{56}$Fe experience a net gravitational force and sediment toward the core. Using new phase diagrams and molecular dynamics simulations, we show that $^{56}$Fe should separate i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::176113e12367bd506ed34662e3013207
http://arxiv.org/abs/2108.11389

Accurate Determination of the Neutron Skin Thickness of Pb208 through Parity-Violation in Electron Scattering

Autor: S. Rahman, H. Albataineh, B. Yale, K. S. Kumar, S. Seeds, A. Deshpande, C. Ayerbe Gayoso, A. Yoon, Q. Campagna, G. M. Urciuoli, G. Leverick, R. Mammei, Bogdan Wojtsekhowski, D. S. Armstrong, Paul Souder, Siyu Jian, C. Palatchi, S. Johnston, C. Jantzi, H. Bhatt, P. E. Reimer, B. Karki, Dipangkar Dutta, T. Ye, D. King, D. McNulty, M. Knauss, L. G. Tang, J. C. Cornejo, T. Gautam, S. Katugampola, P. M. King, R. W. Radloff, H. Liu, J. O. Hansen, J. Pan, D. C. Jones, Michael Pitt, S. Riordan, E. W. Wertz, S. Park, R. Michaels, Y. Tian, C. Metts, M. N. H. Rashad, P. Datta, S. Premathilake, S. Malace, W. Zhang, S. Covrig Dusa, Y. Roblin, I. Halilovic, K. A. Aniol, T. Averett, S. Barcus, C. Feldman, N. Liyange, B. Pandey, A. Zec, E. Fuchey, Charles Horowitz, Jay Benesch, Michaela Thiel, Kent Paschke, A. Narayan, C. Ghosh, D. Adhikari, Brendan Reed, B. P. Quinn, Jiawen Zhang, F. Hauenstein, Cynthia Keppel, M. Petrusky, Darko Androić, G. D. Cates, D. G. Meekins, R. Richards, V. Bellini, N. Lashley-Colthirst, A. Rathnayake, M. M. Mondal, X. Zheng, Michael Gericke, M. McCaughan, Andrew Puckett, Juliette Mammei, A. Camsonne, A. Shahinyan, B. Blaikie, C. Clarke, D. Gaskell, Y. Chen, Jim Napolitano, V. Owen, C. Gal, D. Nikolaev, D. Bhetuwal, R. S. Beminiwattha, W. Henry, T. Kutz, D. Bhatta Pathak

Publikováno v: Physical Review Letters. 126

We report a precision measurement of the parity-violating asymmetry A_{PV} in the elastic scattering of longitudinally polarized electrons from ^{208}Pb. We measure A_{PV}=550±16(stat)±8(syst) parts per billion, leading to an extraction of the neut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47c51d6d1d2deab5fcf4ddffd178da23
https://doi.org/10.1103/physrevlett.126.172502

Effect of increasing neutron-excess on the fusion cross-section in 12−15C + 12C at above-barrier energies

Autor: Zidu Lin, Varinderjit Singh, Charles Horowitz, Sylvie Hudan, Romualdo deSouza

Publikováno v: Physics Letters B, Vol 814, Iss, Pp 136115-(2021)

Fusion excitation functions at energies above the fusion barrier for 12−15C + 12C are examined. From these excitation functions the average fusion cross-section, σ F > , is calculated. For this isotopic chain, the measured dependence of σ F > on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0abd3e522960a9c0537d3eb1f223ea0
http://www.sciencedirect.com/science/article/pii/S0370269321000551

GW190814: Impact of a 2.6 solar mass neutron star on the nucleonic equations of state

Autor: Jorge Piekarewicz, Charles Horowitz, Brendan Reed, Farrukh J. Fattoyev

Publikováno v: Physical Review C. 102

Is the secondary component of GW190814 the lightest black hole or the heaviest neutron star ever discovered in a double compact-object system [R. Abbott et al., ApJ Lett., 896, L44 (2020)]? This is the central question animating this letter. Covarian

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::972c6d50e7be429c60c33fae18e11d6c
https://doi.org/10.1103/physrevc.102.065805

Weak charge and weak radius of C12

Autor: Charles Horowitz, Xavier Roca-Maza, Chien-Yeah Seng, Jens Erler, Jorge Piekarewicz, Oleksandr Koshchii, Hubert Spiesberger, Mikhail Gorchtein

Publikováno v: Physical Review C

We present a feasibility study of a simultaneous subpercent extraction of the weak charge and the weak radius of the $^{12}\mathrm{C}$ nucleus using parity-violating electron scattering, based on a largely model-independent assessment of the uncertai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e3ba3c3db0366941f80564a05b65e6e
https://doi.org/10.1103/physrevc.102.022501