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Now showing items 2741-2750 of 75887

    • Jet-ISM interactions near the microquasars GRS 1758-258 and 1E 1740.7-2942
      Tetarenko, A.J.; Rosolowsky, E.W.; Miller-Jones, James ; Sivakoff, G.R. (2020)
      We present Atacama Large Millimeter/Sub-millimeter Array observations of the candidate jet-ISM interaction zones near the black hole X-ray binaries GRS 1758-258 and 1E 1740.7-2942. Using these data, we map the molecular ...
    • Observations of the disk/jet coupling of MAXI J1820+070 during its descent to quiescence
      Shaw, A.W.; Plotkin, Richard ; Miller-Jones, James ; Homan, J.; Gallo, E.; Russell, D.M.; Tomsick, J.A.; Kaaret, P.; Corbel, S.; Espinasse, M.; Bright, J. (2021)
      Black hole X-ray binaries in the quiescent state (Eddington ratios typically ≲10−5) display softer X-ray spectra (photon indices Γ ∼ 2) compared to higher-luminosity black hole X-ray binaries in the hard state (Γ ∼ 1.7). ...
    • Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1
      Zhao, X.; Gou, L.; Dong, Y.; Zheng, X.; Steiner, J.F.; Miller-Jones, James ; Bahramian, Arash ; Orosz, J.A.; Feng, Y. (2021)
      Cygnus X-1 is a well-studied persistent black hole X-ray binary. Recently, the three parameters needed to estimate the black hole spin of this system, namely the black hole mass M, the orbital inclination i, and the source ...
    • Wind Mass-loss Rates of Stripped Stars Inferred from Cygnus X-1
      Neijssel, C.J.; Vinciguerra, S.; Vigna-Gómez, A.; Hirai, R.; Miller-Jones, James ; Bahramian, Arash ; Maccarone, T.J.; Mandel, I. (2021)
      Recent observations of the high-mass X-ray binary Cygnus X-1 have shown that both the companion star (41 solar masses) and the black hole (21 solar masses) are more massive than previously estimated. Furthermore, the black ...
    • Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds
      Miller-Jones, James ; Bahramian, Arash ; Orosz, J.A.; Mande, I.; Gou, L.; Maccarone, T.J.; Neijsse, C.J.; Zhao, X.; Ziółkowski, J.; Reid, M.J.; Uttley, P.; Zheng, X.; Byun, D.Y.; Dodson, R.; Grinberg, V.; Jung, T.; Kim, J.S.; Marcote, B.; Markoff, S.; Rioja, M.J.; Rushton, A.P.; Russell, D.M.; Sivakoff, G.R.; Tetarenko, A.J.; Tudose, V.; Wilms, J. (2021)
      The evolution of massive stars is influenced by the mass lost to stellar winds over their lifetimes. These winds limit the masses of the stellar remnants (such as black holes) that the stars ultimately produce. We used ...
    • A tidal disruption event coincident with a high-energy neutrino
      Stein, R.; Velzen, S.V.; Kowalski, M.; Franckowiak, A.; Gezari, S.; Miller-Jones, James ; Frederick, S.; Sfaradi, I.; Bietenholz, M.F.; Horesh, A.; Fender, R.; Garrappa, S.; Ahumada, T.; Andreoni, I.; Belicki, J.; Bellm, E.C.; Böttcher, M.; Brinnel, V.; Burruss, R.; Cenko, S.B.; Coughlin, M.W.; Cunningham, V.; Drake, A.; Farrar, G.R.; Feeney, M.; Foley, R.J.; Gal-Yam, A.; Golkhou, V.Z.; Goobar, A.; Graham, M.J.; Hammerstein, E.; Helou, G.; Hung, T.; Kasliwal, M.M.; Kilpatrick, C.D.; Kong, A.K.H.; Kupfer, T.; Laher, R.R.; Mahabal, A.A.; Masci, F.J.; Necker, J.; Nordin, J.; Perley, D.A.; Rigault, M.; Reusch, S.; Rodriguez, H.; Rojas-Bravo, C.; Rusholme, B.; Shupe, D.L.; Singer, L.P.; Sollerman, J.; Soumagnac, M.T.; Stern, D.; Taggart, K.; van Santen, J.; Ward, C.; Woudt, P.; Yao, Y. (2021)
      Cosmic neutrinos provide a unique window into the otherwise hidden mechanism of particle acceleration in astrophysical objects. The IceCube Collaboration recently reported the likely association of one high-energy neutrino ...
    • Towards a larger sample of radio jets from quiescent black hole X-ray binaries
      Plotkin, Richard ; Bahramian, Arash ; Miller-Jones, James ; Reynolds, M.T.; Atri, P.; Maccarone, T.J.; Shaw, A.W.; Gandhi, P. (2021)
      Quiescent black hole X-ray binaries (X-ray luminosities ≲1034 erg s−1) are believed to be fed by hot accretion flows that launch compact, relativistic jets. However, due to their low luminosities, quiescent jets have been ...
    • The MAVERIC Survey: Dynamical Origin of Radio Sources in Galactic Globular Clusters
      Zhao, Y.; Heinke, C.O.; Shishkovsky, L.; Strader, J.; Chomiuk, L.; Maccarone, T.J.; Bahramian, Arash ; Sivakoff, G.R.; Miller-Jones, James ; Tremou, E. (2021)
      We investigate potential correlations between radio source counts (after background corrections) of 22 Galactic globular clusters (GCs) from the MAVERIC survey and the stellar encounter rates (Γ) and masses (M) of the ...
    • The MAVERIC Survey: Simultaneous Chandra and VLA observations of the transitional millisecond pulsar candidate NGC 6652B
      Paduano, A.; Bahramian, Arash ; Miller-Jones, James ; Kawka, Adela ; Strader, J.; Chomiuk, L.; Heinke, C.O.; MacCarone, T.J.; Britt, C.T.; Plotkin, Richard ; Shaw, A.W.; Shishkovsky, L.; Tremou, E.; Tudor, V.; Sivakoff, G.R. (2021)
      Transitional millisecond pulsars are millisecond pulsars that switch between a rotation-powered millisecond pulsar state and an accretion-powered X-ray binary state, and are thought to be an evolutionary stage between ...
    • A deep search for faint Chandra X-ray sources, radio sources, and optical counterparts in NGC 6752
      Cohn, H.N.; Lugger, P.M.; Zhao, Y.; Tudor, V.; Heinke, C.O.; Cool, A.M.; Anderson, J.; Strader, J.; Miller-Jones, James (2021)
      We report the results of a deep search for faint Chandra X-ray sources, radio sources, and optical counterparts in the nearby, core-collapsed globular cluster, NGC 6752. We combined new and archival Chandra imaging to ...