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XMM-Newton Detection and Spectrum of the Second Fastest Spinning Pulsar PSR J0952-0607
Ho, Wynn C. G.; Heinke, Craig O.; Chugunov, Andrey I.
With a spin frequency of 707 Hz, PSR J0952-0607 is the second fastest spinning pulsar known. It was discovered in radio by LOFAR in 2017 at an estimated distance of either 0.97 or 1.74 kpc and has a low-mass companion with a 6.42 hr orbital period. We report the discovery of the X-ray counterpart of PSR J0952-0607 using XMM-Newton. The X-ray spect…
Evolution of Coronal Mass Ejection Properties in the Inner Heliosphere: Prediction for the Solar Orbiter and Parker Solar Probe
Poedts, Stefaan; Lugaz, Noé; Al-Haddad, Nada +3 more
The evolution of the magnetic field and plasma quantities inside a coronal mass ejection (CME) with distance are known from statistical studies using data from 1 au monitors, planetary missions, Helios, and Ulysses. This does not cover the innermost heliosphere, below 0.29 au, where no data are yet publicly available. Here, we describe the evoluti…
Acceleration of protons and heavy ions to suprathermal energies during dipolarizations in the near-Earth magnetotail
Grigorenko, Elena E.; Kronberg, Elena A.; Daly, Patrick W. +2 more
In this work we present an analysis of the dynamics of suprathermal ions of different masses (H+, He+, O+) during prolonged dipolarizations in the near-Earth magnetotail (X>-17RE) according to Cluster/RAPID observations in 2001-2005. All dipolarizations from our database were associated with fast flow…
Chemical abundances of open clusters from high-resolution infrared spectra - I. NGC 6940
Sneden, C.; Pilachowski, C. A.; Mace, G. N. +8 more
We present near-infrared spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. High-resolution (R ≃ 45 000) and high-signal-to-noise ratio (S/N > 100) near-infrared H- and K-band spectra were gathered with the Immersion Grating Infrared Spectrograph (IGRINS) on the 2.7-m Smith Telescope at McDonald Observatory. W…
Energetic Oxygen and Sulfur Charge States in the Outer Jovian Magnetosphere: Insights From the Cassini Jupiter Flyby
Wilson, R. J.; Krimigis, S. M.; Mitchell, D. G. +10 more
On 10 January 2001, Cassini briefly entered into the magnetosphere of Jupiter, en route to Saturn. During this excursion into the Jovian magnetosphere, the Cassini Magnetosphere Imaging Instrument/Charge-Energy-Mass Spectrometer detected oxygen and sulfur ions. While Charge-Energy-Mass Spectrometer can distinguish between oxygen and sulfur charge …
Graphene oxide nanoparticles in the interstellar medium
Sarre, P. J.
Dust particles play a major role in the formation, evolution and chemistry of interstellar clouds, stars, and planetary systems. Commonly identified forms include amorphous and crystalline carbon-rich particles and silicates. Also present in many astrophysical environments are polycyclic aromatic hydrocarbons (PAHs), detected through their infrare…
Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA
Kohno, Kotaro; Daddi, Emanuele; Gao, Yu +8 more
We present ALMA observations of the CO(1-0) line and 3 mm continuum emission in eight ultraluminous infrared (IR) quasi-stellar objects (QSOs) at z = 0.06-0.19. All eight IR QSO hosts are clearly resolved in their CO molecular gas emission with a median source size of 3.2 kpc, and seven out of eight sources are detected in 3 mm continuum, which is…
Compact star-forming galaxies preferentially quenched to become PSBs in z < 1 clusters
Simpson, Chris; Wild, Vivienne; Almaini, Omar +5 more
We analyse the structure of galaxies with high specific star formation rate (SSFR) in cluster and field environments in the redshift range 0.5 < z < 1.0. Recent studies have shown that these galaxies are strongly depleted in dense environments due to rapid environmental quenching, giving rise to post-starburst galaxies (PSBs). We use effecti…
HST/COS Observations of the Warm Ionized Gaseous Halo of NGC 891
Bregman, Joel N.; Qu, Zhijie; Hodges-Kluck, Edmund J.
The metallicity of galactic gaseous halos provides insights into accretion and feedback of galaxies. The nearby edge-on galaxy NGC 891 has a multicomponent gaseous halo and a background active galactic nucleus (AGN; LQAC 035+042 003) projected 5 kpc above the disk near the minor axis. Against the UV continuum of this AGN, we detect lines from 13 i…
Discovery statistics and 1/a distribution of long-period comets detected during 1801-2017
Dybczyński, Piotr A.; Królikowska, Małgorzata
For the last two decades, we have been observing a huge increase in discoveries of long-period comets (LPCs), especially those with large perihelion distances. We collected data for a full sample of LPCs discovered during 1801-2017, including their osculating orbits, discovery moments (to study the discovery distances) and original semimajor axes …