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The Multi-Temporal Database of Planetary Image Data (MUTED): A database to support the identification of surface changes and short-lived surface processes
Jaumann, R.; Hiesinger, H.; Erkeling, G. +3 more
Images of Mars taken by spacecraft in the last few decades indicate that the landscape has changed and that current processes are continuously changing the surface. The modifications of the landscape are caused by exogenic processes including eolian activity, mass movement, the growth and retreat of the polar caps, glacial processes and crater-for…
On the Rotation of Sunspots and Their Magnetic Polarity
Wang, Haimin; Yang, Zhiliang; Wang, Shuo +2 more
The rotation of sunspots of 2 yr in two different solar cycles is studied with the data from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory and the Michelson Doppler Imager instrument on board the Solar and Heliospheric Observataory. We choose the α sunspot groups and the relatively large and stable sunspots of comple…
Statistical study on ultralow-frequency waves in the magnetotail lobe observed by Cluster
Zhang, T. L.; Volwerk, M.; Wang, G. Q.
Based on Cluster data, we investigate 263 waves with periods between 40 and 150 s (Pi2 band events) and 161 waves with periods between 150 and 600 s (Pc5 band events) in the magnetotail lobe. Our findings are as follows: (1) 90% of the mean wave amplitudes within 40-150 s (150-600 s) are below ~0.25 (0.36) nT for the transverse components and ~0.1…
Comparison of Hipparcos Trigonometric and Mount Wilson Spectroscopic Parallaxes for 90 Subgiants that Defined the Class in 1935
Majewski, Steven R.; Beaton, Rachael L.; Sandage, Allan
A history is given of the discovery between 1914 and 1935 of stars of intermediate luminosity between giants and dwarfs with spectral types between G0 to K3. The Mount Wilson spectroscopists identified about 90 such stars in their 1935 summary paper of spectroscopic absolute magnitudes for 4179 stars. Called “subgiants” by Strömberg, these 90 star…
The XMM Cluster Survey: the halo occupation number of BOSS galaxies in X-ray clusters
Streblyanska, Alina; Schneider, Donald P.; Hilton, Matt +26 more
We present a direct measurement of the mean halo occupation distribution (HOD) of galaxies taken from the eleventh data release (DR11) of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey (BOSS). The HOD of BOSS low-redshift (LOWZ: 0.2 < z < 0.4) and Constant-Mass (CMASS: 0.43 < z < 0.7) galaxies is inferred via …
A Suzaku observation of the low-mass X-ray binary GS 1826-238 in the hard state
Makishima, Kazuo; Nakazawa, Kazuhiro; Zhang, Zhongli +2 more
The neutron star low-mass X-ray binary GS 1826-238 was observed with Suzaku on 2009 October 21, for a total exposure of 1030 ks. Except for the type I bursts, the source intensity was constant within ∼10%. Combining the Suzaku XIS, HXD-PIN, and HXD-GSO data, burst-removed persistent emission was detected over the 0.8-100 keV range, at an unabsorbe…
High-mass Star Formation Toward Southern Infrared Bubble S10
Tej, Anandmayee; Ishwara Chandra, C. H.; Vig, Sarita +2 more
An investigation in radio and infrared wavelengths of two high-mass star-forming regions toward the southern Galactic bubble S10 is presented here. The two regions under study are associated with the broken bubble S10 and Extended Green Object, G345.99-0.02, respectively. Radio continuum emission mapped at 610 and 1280 MHz using the Giant Metrewav…
Fermi-LAT Observations of Supernova Remnant G5.7-0.1, Believed to be Interacting with Molecular Clouds
Slane, Patrick; Castro, Daniel; Gelfand, Joseph +1 more
This work reports on the detection of γ-ray emission coincident with the supernova remnant (SNR) G5.7-0.1 using data collected by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. The SNR is believed to be interacting with molecular clouds, based on 1720 MHz hydroxyl (OH) maser emission observations in its direction. This inte…
Dense Molecular Cores Being Externally Heated
Kim, Gwanjeong; Kim, Mi-Ryang; Lee, Chang Won +2 more
We present results of our study of eight dense cores, previously classified as starless, using infrared (3-160 µm) imaging observations with the AKARI telescope and molecular line (HCN and N2H+) mapping observations with the KVN telescope. Combining our results with the archival IR to millimeter continuum data, we exami…
Towards 21st century stellar models: Star clusters, supercomputing and asteroseismology
Christensen-Dalsgaard, J.; Stello, D.; D'Orazi, V. +8 more
Stellar models provide a vital basis for many aspects of astronomy and astrophysics. Recent advances in observational astronomy - through asteroseismology, precision photometry, high-resolution spectroscopy, and large-scale surveys - are placing stellar models under greater quantitative scrutiny than ever. The model limitations are being exposed a…