Search Results - "Kaaret, P."

Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane by Brorby, M, Kaaret, P, Prestwich, A, Mirabel, I F

“…The source of energetic photons that heated and reionized the early Universe remains uncertain. Early galaxies had low metallicity and recent population…”
Get full text

X-ray binary formation in low-metallicity blue compact dwarf galaxies by Brorby, M., Kaaret, P., Prestwich, A.

“…X-rays from binaries in small, metal-deficient galaxies may have contributed significantly to the heating and reionization of the early Universe. We…”
Get full text

Observations of Magnetospheric Solar Wind Charge Exchange by Ringuette, R., Kuntz, K. D., Koutroumpa, D., Kaaret, P., LaRocca, D., Richardson, J.

“…Abstract The study of solar wind charge exchange (SWCX) emission is vital to both the X-ray astrophysics and heliophysics communities. SWCX emission…”
Get full text

Effects of metallicity on high-mass X-ray binary formation by Ponnada, S, Brorby, M, Kaaret, P

“…ABSTRACT The heating of the intergalactic medium in the early, metal-poor Universe may have been partly due to radiation from high-mass X-ray binaries (HMXBs)…”
Get full text

Enhanced X-ray emission from candidate Lyman continuum emitting galaxies by Bluem, J, Kaaret, P, Prestwich, A, Brorby, M

“…ABSTRACT X-ray binaries may have helped reionize the early Universe by enabling Lyman continuum escape. We analysed a set of eight local galaxies that are…”
Get full text

A Disc-Dominated and Clumpy Circumgalactic Medium of the Milky Way Seen in X-Ray Emission by Kaaret, P, Koutroumpa, D, Kuntz, K D, Jahoda, K, Bluem, J, Gulick, H, Hodges-kluck, E, LaRocca, D M, Ringuette, R, Zajczyk, A

“…The Milky Way galaxy is surrounded by a circumgalactic medium (CGM) that may play a key role in galaxy evolution as the source of gas for star formation and a…”
Get full text

Revisiting the radio/X-ray flux correlation in the black hole V404 Cyg: from outburst to quiescence by Corbel, S., Koerding, E., Kaaret, P.

“…We report results of Chandra X-ray and Very Large Array (VLA) radio observations of the Galactic accreting black hole V404 Cyg (GS 2023+338) in its quiescent…”
Get full text

Rapid turn-on of a luminous X-ray source in the candidate Lyman continuum emitting galaxy Tol 0440-381 by Kaaret, P, Bluem, J, Prestwich, A H

“…ABSTRACT Chandra observations of the nearby candidate Lyman continuum (LyC) emitting galaxy Tol 0440-381 show brightening of an X-ray source by at least a…”
Get full text

THE 2015 DECAY OF THE BLACK HOLE X-RAY BINARY V404 CYGNI: ROBUST DISK-JET COUPLING AND A SHARP TRANSITION INTO QUIESCENCE by Plotkin, R. M., Miller-Jones, J. C. A., Gallo, E., Jonker, P. G., Homan, J., Tomsick, J. A., Kaaret, P., Russell, D. M., Heinz, S., Hodges-Kluck, E. J., Markoff, S., Sivakoff, G. R., Altamirano, D., Neilsen, J.

“…ABSTRACT We present simultaneous X-ray and radio observations of the black hole X-ray binary V404 Cygni at the end of its 2015 outburst. From 2015 July…”
Get full text

Observations of the Disk/Jet Coupling of MAXI J1820+070 during Its Descent to Quiescence by Shaw, A. W., Plotkin, R. M., Miller-Jones, J. C. A., Homan, J., Gallo, E., Russell, D. M., Tomsick, J. A., Kaaret, P., Corbel, S., Espinasse, M., Bright, J.

“…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…”
Get full text

A Search for the 3.5 keV Line from the Milky Way’s Dark Matter Halo with HaloSat by Silich, E. M., Jahoda, K., Angelini, L., Kaaret, P., Zajczyk, A., LaRocca, D. M., Ringuette, R., Richardson, J.

“…Previous detections of an X-ray emission line near 3.5 keV in galaxy clusters and other dark-matter-dominated objects have been interpreted as observational…”
Get full text

OPTICAL EMISSION OF THE ULTRALUMINOUS X-RAY SOURCE NGC 5408 X-1: DONOR STAR OR IRRADIATED ACCRETION DISK? by GRISE, F, KAARET, P, CORBEL, S, FENG, H, CSEH, D, TAO, L

“…We obtained three epochs of simultaneous Hubble Space Telescope (HST)/Wide Field Camera 3 and Chandra observations of the ultraluminous X-ray source (ULX) NGC…”
Get full text

VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies by Adams, C. B., Benbow, W., Brill, A., Brose, R., Buchovecky, M., Capasso, M., Christiansen, J. L., Chromey, A. J., Daniel, M. K., Errando, M., Falcone, A., Feng, Q., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Gillanders, G. H., Giuri, C., Hanna, D., Hervet, O., Holder, J., Hughes, G., Humensky, T. B., Jin, W., Kaaret, P., Kelley-Hoskins, N., Kertzman, M., Kieda, D., Krennrich, F., Kumar, S., Lang, M. J., Lundy, M., Maier, G., Moriarty, P., Mukherjee, R., Nieto, D., Nievas-Rosillo, M., O’Brien, S., Ong, R. A., Otte, A. N., Pfrang, K., Pohl, M., Prado, R. R., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Richards, G. T., Roache, E., Ryan, J. L., Santander, M., Schlenstedt, S., Sembroski, G. H., Shang, R., Stevenson, B., Wakely, S. P., Weinstein, A., Williams, D. A.

“…Abstract The Galactic Center (GC) region hosts a variety of powerful astronomical sources and rare astrophysical processes that emit a large flux of nonthermal…”
Get full text

The black hole candidate XTE J1752−223 towards and in quiescence: optical and simultaneous X-ray-radio observations by Ratti, E. M., Jonker, P. G., Miller-Jones, J. C. A., Torres, M. A. P., Homan, J., Markoff, S., Tomsick, J. A., Kaaret, P., Wijnands, R., Gallo, E., Özel, F., Steeghs, D. T. H., Fender, R. P.

“…We present optical, X-ray and radio observations of the black hole transient (BHT) XTE J1752−223 towards and in quiescence. Optical photometry shows that the…”
Get full text

A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2 by Sathyaprakash, R, Roberts, T P, Grisé, F, Kaaret, P, Ambrosi, E, Done, C, Gladstone, J C, Kajava, J J E, Soria, R, Zampieri, L

“…ABSTRACT NGC 1313 X-2 is one of the few known pulsating ultraluminous X-ray sources (PULXs), and so is thought to contain a neutron star that accretes at…”
Get full text

Transition of an X-ray binary to the hard ultraluminous state in the blue compact dwarf galaxy VII Zw 403 by Brorby, M., Kaaret, P., Feng, H.

“…We examine the X-ray spectra of VII Zw 403, a nearby low-metallicity blue compact dwarf (BCD) galaxy. The galaxy has been observed to contain an X-ray source,…”
Get full text

HaloSat Observations of Heliospheric Solar Wind Charge Exchange by Ringuette, R., Koutroumpa, D., Kuntz, K. D., Kaaret, P., Jahoda, K., LaRocca, D., Kounkel, M., Richardson, J., Zajczyk, A., Bluem, J.

“…X-ray emission from solar wind charge exchange (SWCX) produced in interplanetary space contaminates every astrophysical observation, regardless of the…”
Get full text

A long-term X-ray monitoring of the ultraluminous X-ray source NGC 5408 X-1 with Swift reveals the presence of dips but no orbital period by Grisé, F., Kaaret, P., Corbel, S., Cseh, D., Feng, H.

“…NGC 5408 X-1 is a well-studied ultraluminous X-ray source (ULX) that has been seen to emit in X-rays persistently above the Eddington limit of a stellar mass…”
Get full text

Measurement of the Extragalactic Background Light Spectral Energy Distribution with VERITAS by Abeysekara, A. U., Archer, A., Benbow, W., Bird, R., Brill, A., Brose, R., Buchovecky, M., Calderon-Madera, D., Christiansen, J. L., Cui, W., Daniel, M. K., Falcone, A., Feng, Q., Fernandez-Alonso, M., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Giuri, C., Gueta, O., Hanna, D., Hassan, T., Hervet, O., Holder, J., Hughes, G., Humensky, T. B., Johnson, C. A., Kaaret, P., Kertzman, M., Kieda, D., Krause, M., Krennrich, F., Kumar, S., Lang, M. J., Maier, G., Moriarty, P., Mukherjee, R., Nievas-Rosillo, M., O'Brien, S., Ong, R. A., Pfrang, K., Pohl, M., Prado, R. R., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Richards, G. T., Roache, E., Rovero, A. C., Sadeh, I., Santander, M., Sembroski, G. H., Shahinyan, K., Sushch, I., Svraka, T., Weinstein, A., Wells, R. M., Wilcox, P., Wilhelm, A., Williams, D. A., Williamson, T. J, Zitzer, B.

“…The extragalactic background light (EBL), a diffuse photon field in the optical and infrared range, is a record of radiative processes over the universe's…”
Get full text

Gamma-ray Observations of Tycho's Supernova Remnant with VERITAS and Fermi by Archambault, S., Archer, A., Benbow, W., Bird, R., Bourbeau, E., Buchovecky, M., Buckley, J. H., Bugaev, V., Cerruti, M., Connolly, M. P., Cui, W., Dwarkadas, V. V., Errando, M., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H., Fortson, L., Furniss, A., Griffin, S., Hütten, M., Hanna, D., Holder, J., Johnson, C. A., Kaaret, P., Kar, P., Kelley-Hoskins, N., Kertzman, M., Kieda, D., Krause, M., Kumar, S., Lang, M. J., Maier, G., McArthur, S., McCann, A., Moriarty, P., Mukherjee, R., Nieto, D., O'Brien, S., Ong, R. A., Otte, A. N., Park, N., Pohl, M., Popkow, A., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Richards, G. T., Roache, E., Sadeh, I., Santander, M., Sembroski, G. H., Shahinyan, K., Slane, P., Staszak, D., Telezhinsky, I., Trepanier, S., Tyler, J., Wakely, S. P., Weinstein, A., Weisgarber, T., Wilcox, P., Wilhelm, A., Williams, D. A., Zitzer, B.

“…High-energy gamma-ray emission from supernova remnants (SNRs) has provided a unique perspective for studies of Galactic cosmic-ray acceleration. Tycho's SNR is…”
Get full text