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RGS Observations of Ejecta Knots in Tycho's Supernova Remnant
Katsuda, Satoru; Petre, Robert; Uchida, Hiroyuki +3 more
We present results from XMM-Newton/Reflection Grating Spectrometer (RGS) observations of prominent knots in the southernmost portion of Tycho's supernova remnant, known to be the remnant of a Type Ia supernova in 1572 C.E. By dispersing the photons from these knots out of the remnant with very little emission in front of or behind them, we obtaine…
Distance to the Energetic Neutral Hydrogen Source from the Heliotail
McComas, D. J.; Dayeh, M. A.; Sokół, J. M. +1 more
The interaction of the solar wind (SW) with the partially ionized interstellar medium forms the heliosphere. As the supersonic SW flows away from the Sun and incorporates pickup ions (PUIs), they are slowed, compressed, and heated at a termination shock, creating an energetic ion population in the inner heliosheath. The neutralization of PUIs in t…
From the inner to outer Milky Way: a photometric sample of 2.6 million red clump stars
Ting, Yuan-Sen; Hawkins, Keith; Lucey, Madeline +1 more
Large pristine samples of red clump stars are highly sought after given that they are standard candles and give precise distances even at large distances. However, it is difficult to cleanly select red clumps stars because they can have the same Teff and log g as red giant branch stars. Recently, it was shown that the asteroseismic para…
NGC 7538 IRS1—an O Star Driving an Ionized Jet and Giant N-S Outflow
Wiesemeyer, Helmut; Güsten, Rolf; Sandell, Göran +4 more
NGC 7538 IRS 1 is a very young embedded O star driving an ionized jet and accreting mass with an accretion rate >10-4 ${M}_{\odot }$ yr-1, which is quenching the hypercompact H II region. We use SOFIA GREAT data, Herschel PACS and SPIRE archive data, SOFIA FORCAST archive data, Onsala 20 m and CARMA data, and JCMT archive …
The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). VIII. Diffuse dust in the Virgo intra-cluster space
Andreani, P.; Bianchi, S.; Boselli, A. +5 more
Aims: We present the first detection of diffuse dust in the intra-cluster medium of the Virgo cluster out to ∼0.4 virial radii, and study the radial variation of its properties on a radial scale of the virial radius.
Methods: Analysing near-UV - i colours for a sample of ∼12 000 background galaxies with redshifts 0.02 < z < 0.8, we…
Methodology and performance of the two-year galactic plane scanning survey of Insight-HXMT
Zhang, Shu; Zhang, Shuang-Nan; Liu, Yuan +7 more
The Galactic plane scanning survey is one of the main scientific objectives of the Hard X-ray Modulation Telescope (known as Insight-HXMT). During the two-year operation of Insight-HXMT, more than 1000 scanning observations have been performed and the whole Galactic plane (0∘ < l <360∘, -10∘ < b <10
The Gaia-ESO Survey: Spectroscopic-asteroseismic analysis of K2 stars in Gaia-ESO. The K2 Galactic Caps Project
Gilmore, G.; Bayo, A.; Lardo, C. +33 more
Context. The extensive stellar spectroscopic datasets that are available for studies in Galactic Archeaology thanks to, for example, the Gaia-ESO Survey, now benefit from having a significant number of targets that overlap with asteroseismology projects such as Kepler, K2, and CoRoT. Combining the measurements from spectroscopy and asteroseismolog…
Cosmological Evolution of Flat-spectrum Radio Quasars Based on the Swift/BAT 105 Month Catalog and Their Contribution to the Cosmic MeV Gamma-Ray Background Radiation
Fukazawa, Yasushi; Inoue, Yoshiyuki; Toda, Koyo
We present a new X-ray luminosity function of flat-spectrum radio quasars (FSRQs) utilizing the latest Swift/BAT 105 month X-ray source catalog. Contrary to previous studies of FSRQs in the X-ray band, using the luminosity-dependent density evolution model we find that FSRQs show evolutionary peaks at z ∼ 1-2 depending on luminosities. Our result …
Late Amazonian Ice Survival in Kasei Valles, Mars
Hepburn, A. J.; Hubbard, B.; Ng, F. S. L. +1 more
High-obliquity excursions on Mars are hypothesized to have redistributed water from the poles to nourish mid-latitude glaciers. Evidence of this process is provided by different types of viscous flow features (ice-rich deposits buried beneath sediment mantle) located there today, including lobate debris aprons (LDAs). During high-obliquity extreme…
A high coverage view of the thermodynamics and metal abundance in the outskirts of the nearby galaxy cluster Abell 2199
Walker, S. A.; Mirakhor, M. S.
We present a joint Suzaku and XMM-Newton analysis of the outskirts of the nearby galaxy cluster Abell 2199, the only nearby galaxy cluster to be observed with near complete azimuthal coverage with Suzaku. Using the XMM-Newton observations to correct for the effects of gas clumping, we find that the azimuthally averaged entropy profile in the outsk…