Science Archives Publication System

Faraday rotation fluctuations of MESSENGER radio signals through the equatorial lower corona near solar minimum

DOI: 10.1002/2016SW001558 Bibcode: 2017SpWea..15..310W

Jensen, E. A.; Heiles, C.; Hollweg, J. V. +4 more

Faraday rotation (FR) of transcoronal radio transmissions from spacecraft near superior conjunction enables study of the temporal variations in coronal plasma density, velocity, and magnetic field. The MESSENGER spacecraft 8.4 GHz radio, transmitting through the corona with closest line-of-sight approach 1.63-1.89 solar radii and near-equatorial h…

2017 • Space Weather

SOHO 10

Natural emergence of neutrino masses and dark matter from R-symmetry

DOI: 10.1007/JHEP10(2017)012 Bibcode: 2017JHEP...10..012C

Chakraborty, Sabyasachi; Chakrabortty, Joydeep

We propose a supersymmetric extension of the Standard Model (SM) with a continuous global U(1)_R symmetry. The R-charges of the SM fields are identified with that of their lepton numbers. As a result, both bilinear and trilinear ` R-parity violating' (RPV) terms could be present at the superpotential. However, R-symmetry is not an exac…

2017 • Journal of High Energy Physics

INTEGRAL 10

Galactic Kinematics Derived From Data in the RAVE5, UCAC4, PPMXL, and Gaia TGAS Catalogs

DOI: 10.1007/s10511-017-9499-0 Bibcode: 2017Ap.....60..462V

Bobylev, V. V.; Bajkova, A. T.; Tsvetkov, A. S. +1 more

The three-dimensional velocities of stars with high-precision positions, proper motions, and parallaxes from the Gaia TGAS catalog and radial velocities from the RAVE5 catalog are examined. A sample of 92395 stars with estimated ages yields the following kinematic parameters: (U, V, W)=(9.42, 20.34, 7.21)±(0.12, 0.10, 0.09) km/s, Ω = 26.29 ± 0.39 …

2017 • Astrophysics

Gaia Hipparcos 10

Mapping the temperature of the intra-cluster medium with the thermal Sunyaev-Zel'dovich effect

DOI: 10.1051/0004-6361/201629993 Bibcode: 2017A&A...604A..94H

Hurier, G.; Tchernin, C.

The hot electrons in the intra-cluster medium produce a spectral distortion of the cosmic microwave background (CMB) black body emission, the thermal Sunyaev-Zel'dovich effect (tSZ). This characteristic spectral distortion is now commonly used to detect and characterize the properties of galaxy clusters. The tSZ effect spectral distortion does not…

2017 • Astronomy and Astrophysics

Planck 10

Observations of the Ultraviolet-bright Star Y453 in the Globular Cluster M4 (NGC 6121)

DOI: 10.3847/1538-3881/aa8450 Bibcode: 2017AJ....154..126D

Chayer, Pierre; Benjamin, Robert A.; Latour, Marilyn +2 more

We present a spectral analysis of the UV-bright star Y453 in M4. Model fits to the star’s optical spectrum yield {T}_{eff} ∼ 56,000 K. Fits to the star’s FUV spectrum, obtained with the Cosmic Origins Spectrograph on board the Hubble Space Telescope, reveal it to be considerably hotter, with {T}_{eff} ∼ 72,000 K. We adopt {T}

2017 • The Astronomical Journal

Gaia eHST 10

A CO survey on a sample of Herschel cold clumps

DOI: 10.1051/0004-6361/201629866 Bibcode: 2017A&A...606A.102F

Juvela, M.; Ristorcelli, I.; Montillaud, J. +4 more

Context. The physical state of cold cloud clumps has a great impact on the process and efficiency of star formation and the masses of the forming stars inside these objects. The sub-millimetre survey of the Planck space observatory and the far-infrared follow-up mapping of the Herschel space telescope provide an unbiased, large sample of these col…

2017 • Astronomy and Astrophysics

Herschel Planck 10

Identification of the Hard X-Ray Source Dominating the E > 25 keV Emission of the Nearby Galaxy M31

DOI: 10.3847/1538-4357/aa62a3 Bibcode: 2017ApJ...838...47Y

Lien, A.; Lehmer, B. D.; Hornschemeier, A. E. +15 more

We report the identification of a bright hard X-ray source dominating the M31 bulge above 25 keV from a simultaneous NuSTAR-Swift observation. We find that this source is the counterpart to Swift J0042.6+4112, which was previously detected in the Swift BAT All-sky Hard X-ray Survey. This Swift BAT source had been suggested to be the combined emiss…

2017 • The Astrophysical Journal

XMM-Newton eHST 10

Investigating the Evolution of the Dual AGN System ESO 509-IG066

DOI: 10.3847/1538-4357/aa932e Bibcode: 2017ApJ...850..168K

Harrison, F. A.; Stern, D.; Treister, E. +13 more

We analyze the evolution of the dual active galactic nucleus (AGN) in ESO 509-IG066, a galaxy pair located at z = 0.034 whose nuclei are separated by 11 kpc. Previous observations with XMM-Newton on this dual AGN found evidence for two moderately obscured ({N}_{{H}} ∼ 10²² cm^-2) X-ray luminous ({L}_{{X}} ∼…

2017 • The Astrophysical Journal

XMM-Newton 10

Exploring the Helium Core of the δ Scuti Star CoRoT 102749568 with Asteroseismology

DOI: 10.3847/1538-4357/834/2/146 Bibcode: 2017ApJ...834..146C

Li, Yan; Chen, Xinghao; Chen, Yanhui +2 more

Based on regularities in rotational splitting, we seek possible multiplets for the observed frequencies of CoRoT 102749568. There are 21 sets of multiplets identified, including four sets of multiplets with l = 1, nine sets of multiplets with l = 2, and eight sets of multiplets with l = 3. In particular, there are three complete triplets (f_10…

2017 • The Astrophysical Journal

CoRoT 10

Complex UV/X-ray variability of 1H 0707-495

DOI: 10.1093/mnras/stx2163 Bibcode: 2017MNRAS.472.2823P

Papadakis, I. E.; Dewangan, G. C.; Pal, Main +3 more

We study the relationship between the UV and X-ray variability of the narrow-line Seyfert 1 galaxy 1H 0707-495. Using a year-long Swift monitoring and four long XMM-Newton observations, we perform cross-correlation analyses of the UV and X-ray light curves, on both long and short time-scales. We also perform time-resolved X-ray spectroscopy on 1-2…

2017 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 10