Zobrazeno 1 - 10
of 249
pro vyhledávání: '"Fragos, T."'
Autor:
Zapartas, E., de Wit, S., Antoniadis, K., Muñoz-Sanchez, G., Souropanis, D., Bonanos, A. Z., Maravelias, G., Kovlakas, K., Kruckow, M. U., Fragos, T., Andrews, J. J., Bavera, S. S., Briel, M., Gossage, S., Kasdagli, E., Rocha, K. A., Sun, M., Srivastava, P. M., Xing, Z.
The rate and mechanism of mass loss of red supergiants (RSGs) remain poorly understood, especially at low metallicities. Motivated by the new empirical prescription by Yang et al. 2023, based on the largest and most complete sample in the Small Magel
Externí odkaz:
http://arxiv.org/abs/2410.07335
Autor:
Charbonnel, C., Schaerer, D., Prantzos, N., Ramírez-Galeano, L., Fragos, T., Kuruvandothi, A., Marques-Chaves, R., Gieles, M.
Publikováno v:
A&A 673, L7 (2023)
Unusually high N/O abundance ratios were recently reported for a very compact, intensively star-forming object GN-z11 at $z=10.6$ from JWST/NIRSpec observations. We present an empirical comparison with the C, N, and O abundance ratios in Galactic glo
Externí odkaz:
http://arxiv.org/abs/2303.07955
Publikováno v:
A&A 665, A28 (2022)
While there is now a consensus that X-ray binaries (XRBs) are the dominant X-ray sources in the early Universe and play a significant role during the epoch of heating of the intergalactic medium (IGM), recent studies report contradicting results rega
Externí odkaz:
http://arxiv.org/abs/2207.09331
Autor:
Zapartas, E., Renzo, M., Fragos, T., Dotter, A., Andrews, J. J., Bavera, S. S., Coughlin, S., Misra, D., Kovlakas, K., Román-Garza, J., Serra, J. G., Qin, Y., Rocha, K. A., Tran, N. H., Xing, Z. P.
Publikováno v:
A&A 656, L19 (2021)
Stripped-envelope supernovae (Types IIb, Ib, and Ic) that show little or no hydrogen comprise roughly one-third of the observed explosions of massive stars. Their origin and the evolution of their progenitors are not yet fully understood. Very massiv
Externí odkaz:
http://arxiv.org/abs/2106.05228
Understanding the ionizing spectrum of low-metallicity galaxies is of great importance for modeling and interpreting emission line observations of early/distant galaxies. Although a wide suite of stellar evolution, atmosphere, population synthesis, a
Externí odkaz:
http://arxiv.org/abs/1911.09914
Autor:
Haemmerlé, L., Eggenberger, P., Ekström, S., Georgy, C., Meynet, G., Postel, A., Audard, M., Sørensen, M., Fragos, T.
Publikováno v:
A&A 624, A137 (2019)
Grids of stellar models are useful tools to derive the properties of stellar clusters, in particular young clusters hosting massive stars, and to provide information on the star formation process in various mass ranges. Because of their short evoluti
Externí odkaz:
http://arxiv.org/abs/1903.10550
Autor:
Foley, R. J., Alexander, K. D., Andreoni, I., Arcavi, I., Auchettl, K., Barnes, J., Baym, G., Bellm, E. C., Beloborodov, A. M., Blagorodnova, N., Blakeslee, J. P., Brady, P. R., Branchesi, M., Brown, J. S., Butler, N., Cantiello, M., Chornock, R., Cook, D. O., Cooke, J., Coppejans, D. L., Corsi, A., Couch, S. M., Coughlin, M. W., Coulter, D. A., Cowperthwaite, P. S., Dietrich, T., Dimitriadis, G., Drout, M. R., Elias, J. H., Farr, B., Fernandez, R., Filippenko, A. V., Fong, W., Fragos, T., Frail, D. A., Freedman, W. L., Fryer, C. L., Golkhou, V. Z., Hiramatsu, D., Hjorth, J., Horesh, A., Hosseinzadeh, G., Hotokezaka, K., Howell, D. A., Hung, T., Jones, D. O., Kalogera, V., Kasen, D., Kerzendorf, W. E., Kilpatrick, C. D., Kirshner, R. P., Krisciunas, K., Lattimer, J. M., Lazzati, D., Levan, A. J., MacFadyen, A. I., Maeda, K., Mandel, I., Mandel, K. S., Margalit, B., Margutti, R., McIver, J., Metzger, B. D., Mooley, K., Moriya, T., Murguia-Berthier, A., Narayan, G., Nicholl, M., Nissanke, S., Nomoto, K., O'Meara, J. M., O'Shaughnessy, R., O'Connor, E., Palmese, A., Pan, Y. -C., Pankow, C., Paterson, K., Perley, D. A., Perna, R., Piro, A. L., Pritchard, T. A., Quataert, E., Radice, D., Ramirez-Ruiz, E., Reddy, S., Rest, A., Riess, A. G., Rodriguez, C. L., Rojas-Bravo, C., Rossi, E. M., Rosswog, S., Ruiz, M., Shapiro, S. L., Shoemaker, D. H., Siebert, M. R., Siegel, D. M., Siellez, K., Smith, N., Soares-Santos, M., Suntzeff, N. B., Surman, R., Tanaka, M., Tanvir, N. R., Terreran, G., Valenti, S., Villar, V. A., Wang, L., Webb, S. A., Wheeler, J. C., Williams, P. K. G., Woosley, S., Zaldarriaga, M., Zevin, M.
As of today, we have directly detected exactly one source in both gravitational waves (GWs) and electromagnetic (EM) radiation, the binary neutron star merger GW170817, its associated gamma-ray burst GRB170817A, and the subsequent kilonova SSS17a/AT
Externí odkaz:
http://arxiv.org/abs/1903.04553
Publikováno v:
A&A 622, L10 (2019)
The origin of nebular HeII emission, which is frequently observed in low-metallicity (O/H) star-forming galaxies, remains largely an unsolved question. Using the observed anticorrelation of the integrated X-ray luminosity per unit of star formation r
Externí odkaz:
http://arxiv.org/abs/1902.10496
Publikováno v:
A&A 616, A28 (2018)
Various binary black hole formation channels have been proposed since the first gravitational event GW150914 was discovered by the Advanced Laser Interferometer Gravitational-Wave Observatory (AdLIGO). For all evolutionary channels based on the evolu
Externí odkaz:
http://arxiv.org/abs/1802.05738
Autor:
Lehmer, B. D., Eufrasio, R. T, Markwardt, L., Zezas, A., Basu-Zych, A., Fragos, T., Hornschemeier, A. E., Ptak, A., Tzanavaris, P., Yukita, M.
We present a new technique for empirically calibrating how the X-ray luminosity function (XLF) of X-ray binary (XRB) populations evolves following a star-formation event. We first utilize detailed stellar population synthesis modeling of far-UV to fa
Externí odkaz:
http://arxiv.org/abs/1710.09403