Zobrazeno 1 - 10
of 167
pro vyhledávání: '"Gilkis, A."'
Autor:
Gilkis, Avishai, Mazeh, Tsevi
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters, Volume 535, Issue 1, pp.L44-L48 (2024)
Three black holes (BHs) in wide binaries - Gaia BH1, BH2 and BH3 - were recently discovered. The likely progenitors of the BHs were massive stars that experienced a supergiant phase, reaching radii of ~1000 Rsun, before collapsing to form the BH. Suc
Externí odkaz:
http://arxiv.org/abs/2409.15899
Autor:
Gagliano, A., Berger, E., Villar, V. A., Hiramatsu, D., Kessler, R., Matsumoto, T., Gilkis, A., Laplace, E.
Enhanced emission in the months to years preceding explosion has been detected for several core-collapse supernovae (SNe). Though the physical mechanisms driving the emission remain hotly debated, the light curves of detected events show long-lived (
Externí odkaz:
http://arxiv.org/abs/2408.13314
Autor:
Shenar, T., Bodensteiner, J., Sana, H., Crowther, P. A., Lennon, D. J., Abdul-Masih, M., Almeida, L. A., Backs, F., Berlanas, S. R., Bernini-Peron, M., Bestenlehner, J. M., Bowman, D. M., Bronner, V. A., Britavskiy, N., de Koter, A., de Mink, S. E., Deshmukh, K., Evans, C. J., Fabry, M., Gieles, M., Gilkis, A., González-Torà, G., Gräfener, G., Götberg, Y., Hawcroft, C., Hénault-Brunet, V., Herrero, A., Holgado, G., Janssens, S., Johnston, C., Josiek, J., Justham, S., Kalari, V. M., Katabi, Z. Z., Keszthelyi, Z., Klencki, J., Kubát, J., Kubátová, B., Langer, N., Lefever, R. R., Ludwig, B., Mackey, J., Mahy, L., Apellániz, J. Maíz, Mandel, I., Maravelias, G., Marchant, P., Menon, A., Najarro, F., Oskinova, L. M., Ovadia, A. J. G. O'Grady R., Patrick, L. R., Pauli, D., Pawlak, M., Ramachandran, V., Renzo, M., Rocha, D. F., Sander, A. A. C., Sayada, T., Schneider, F. R. N., Schootemeijer, A., Schösser, E. C., Schürmann, C., Sen, K., Shahaf, S., Simón-Díaz, S., Stoop, M., van Loon, J. Th., Toonen, S., Tramper, F., Valli, R., van Son, L. A. C., Vigna-Gómez, A., Villaseñor, J. I., Vink, J. S., Wang, C., Willcox, R.
Surveys in the Milky Way and Large Magellanic Cloud revealed that the majority of massive stars will interact with companions during their lives. However, knowledge of the binary properties of massive stars at low metallicity, which approaches the co
Externí odkaz:
http://arxiv.org/abs/2407.14593
Autor:
Shenar, T., Wade, G. A., Marchant, P., Bagnulo, S., Bodensteiner, J., Bowman, D. M., Gilkis, A., Langer, N., Chene, A. -N., Oskinova, L., Van Reeth, T., Sana, H., St-Louis, N., de Oliveira, A. Soares, Todt, H., Toonen, S.
Magnetars are highly magnetized neutron stars; their formation mechanism is unknown. Hot helium-rich stars with spectra dominated by emission lines are known as Wolf-Rayet stars. We observe the binary system HD 45166 using spectropolarimetry, finding
Externí odkaz:
http://arxiv.org/abs/2308.08591
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 522, Issue 1, June 2023, Pages 1140-1154
We use the rapid binary stellar evolution code BINARY_C to estimate the rate of merging neutron stars with numerous combinations of envelope ejection efficiency and natal kick dispersion. We find a peak in the local rate of merging neutron stars arou
Externí odkaz:
http://arxiv.org/abs/2304.01949
Autor:
Gilkis, Avishai, Shenar, Tomer
Upsilon Sagittarii is a hydrogen-deficient binary that has been suggested to be in its second stage of mass transfer, after the primary has expanded to become a helium supergiant following core helium exhaustion. A tentative identification of the fai
Externí odkaz:
http://arxiv.org/abs/2209.14315
Autor:
Pellegrino, C., Howell, D. A., Terreran, G., Arcavi, I., Bostroem, K. A., Brown, P. J., Burke, J., Dong, Y., Gilkis, A., Hiramatsu, D., Hosseinzadeh, G., McCully, C., Modjaz, M., Newsome, M., Gonzalez, E. Padilla, Pritchard, T. A., Sand, D. J., Valenti, S., Williamson, M.
Publikováno v:
The Astrophysical Journal, Volume 938, page 73, 2020
We present a sample of Type Icn supernovae (SNe Icn), a newly-discovered class of transients characterized by their interaction with H- and He-poor circumstellar material (CSM). This sample is the largest collection of SNe Icn to date and includes ob
Externí odkaz:
http://arxiv.org/abs/2205.07894
Autor:
Gilkis, Avishai, Arcavi, Iair
Core-collapse supernovae showing little or no hydrogen (denoted by Type IIb and Ib, respectively) are the explosions of massive stars that have lost some or most of their outer envelopes. How they lose their mass is unclear, but it likely involves bi
Externí odkaz:
http://arxiv.org/abs/2111.04432
Autor:
Gilkis, Avishai, Shenar, Tomer, Ramachandran, Varsha, Jermyn, Adam S., Mahy, Laurent, Oskinova, Lidia M., Arcavi, Iair, Sana, Hugues
The Humphreys-Davidson (HD) limit empirically defines a region of high luminosities (log L > 5.5) and low effective temperatures (T < 20kK) on the Hertzsprung-Russell Diagram in which hardly any supergiant stars are observed. Attempts to explain this
Externí odkaz:
http://arxiv.org/abs/2102.03102
Publikováno v:
A&A 634, A79 (2020)
Classical Wolf-Rayet (WR) stars are massive, hydrogen depleted, post main-sequence stars that exhibit emission-line dominated spectra. For a given metallicity Z, stars exceeding a certain initial mass M_single(Z) can reach the WR phase through intrin
Externí odkaz:
http://arxiv.org/abs/2001.04476