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19922026
most citedFirst Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

1.9k citations

Showing 2019 · astro-ph.HEShow all

8 papers · 2 filters

astro-ph.HE2019★ 21 cited

Evidence of non-luminous matter in the center of M62

Federico Abbate, Andrea Possenti, Monica Colpi +1

Theoretical models suggest that intermediate mass black holes (IMBHs) may form and reside in the centers of globular clusters. IMBHs are still elusive to observations, but the acce…

astro-ph.HE2019★ 26 cited

New insights on the puzzling LMXB 1RXS J180408.9-342058: the intermediate state, the clocked type-I X-ray bursts and much more

A. Marino, M. Del Santo, M. Cocchi +7

1RXS J180408.9--342058 is a low mass X-ray binary hosting a neutron star, which shows X-ray activity at very different mass-accretion regimes, from very faint to almost the Eddingt…

astro-ph.HE2019★ 43 cited

X-ray dips and a complex UV/X-ray cross-correlation function in the black hole candidate MAXI J1820+070

J. J. E. Kajava, S. E. Motta, A. Sanna +3

MAXI J1820+070, a black hole candidate first detected in early March 2018, was observed by XMM-Newton during the outburst rise. In this letter we report on the spectral and timing…

astro-ph.HE2019★ 30 cited

Indications of non-conservative mass-transfer in AMXPs

A. Marino, T. Di Salvo, L. Burderi +7

Context. Since the discovery of the first Accreting Millisecond X-ray Pulsar SAX J1808.4-3658 in 1998, the family of these sources kept growing on. Currently, it counts 22 members.…

astro-ph.HE2019★ 11 cited

Updated orbital ephemeris of the ADC source X 1822-371: a stable orbital expansion over 40 years

S. M. Mazzola, R. Iaria, T. Di Salvo +6

The source X 1822-371 is an eclipsing compact binary system with a period close to 5.57 hr and an orbital period derivative of 1.51(7) s s$^{-1…

astro-ph.HE2019★ 15 cited

Spectral analysis of the dipping LMXB system XB 1916-053

A. F. Gambino, R. Iaria, T. Di Salvo +6

Context: XB 1916-053 is a low mass X-ray binary system (LMXB) hosting a neutron star (NS) and showing periodic dips. The spectrum of the persistent emission was modeled with a blac…

astro-ph.HE2019★ 7 cited

IGR J17503-2636: a candidate supergiant fast X-ray transient

C. Ferrigno, E. Bozzo, A. Sanna +4

IGR J17503-2636 is a hard X-ray transient discovered by INTEGRAL on 2018 August 11. This was the first ever reported X-ray emission from this source. Following the discovery, follo…

astro-ph.HE2019★ 19 cited

Study of the X-ray properties of the neutron-star binary 4U 172834 from the soft to hard state

Yanan Wang, Mariano Méndez, Diego Altamirano +7

We studied five XMM-Newton observations of the neutron-star binary 4U 172834 covering the hard, intermediate and soft spectral states. By jointly fitting the spectra with severa…