Search Publications
Characterizing dark mantle deposits in the lunar crater Alphonsus
Videen, G.; Ivanov, M. A.; Shkuratov, Y. G. +6 more
We analyze available remote-sensing data of the crater Alphonsus, focusing on the analysis of the crater's dark mantle deposits (DMDs), which includes images from NASA Clementine and Lunar Reconnaissance Orbiter (LRO), Japanese Selene (Kaguya), and Indian Chandrayaan-1 missions. The Alphonsus DMDs are gentle-sloped flat hills with typical heights …
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud - III. Horizontal branch morphology
Cohen, Roger E.; Wagner-Kaiser, R.; Sarajedini, Ata +5 more
We leverage new high-quality data from Hubble Space Telescope program GO-14164 to explore the variation in horizontal branch morphology among globular clusters in the Large Magellanic Cloud (LMC). Our new observations lead to photometry with a precision commensurate with that available for the Galactic globular cluster population. Our analysis ind…
Empirical Modeling of Dayside Magnetic Structures Associated With Polar Cusps
Tsyganenko, N. A.; Andreeva, V. A.
The magnetic structure of dayside polar cusps is intimately related to the high-latitude field-aligned currents (FACs) and the cross-B diamagnetic currents due to the penetrated plasma of magnetosheath origin. The dayside FAC configuration is sensitive to the azimuthal component of the interplanetary magnetic field, manifested in the latitudinal s…
Probing Signatures of a Distant Planet around the Young T-Tauri Star CI Tau Hosting a Possible Hot Jupiter
Hashimoto, Jun; Konishi, Mihoko; Hori, Yasunori
We search for signatures of a distant planet around the two million-year-old classical T-Tauri star CI Tau hosting a hot-Jupiter candidate ({M}{{p}}\sin i∼ 8.1 {M}Jupiter}) in an eccentric orbit (e ∼ 0.3). To probe the existence of an outer perturber, we reanalyzed 1.3 mm dust continuum observations of the protoplanetary disk…
Evidence for impact melt sheets in lunar highland smooth plains and implications for polar landing sites
Weitz, Catherine M.; Whitten, Jennifer L.; Campbell, Bruce A. +1 more
Smooth plains units attributed to fluidized basin ejecta occur over much of the lunar highlands. We examined 4-20 km diameter Imbrian- and Eratosthenian-period craters in the southern highlands that have high 12.6-cm wavelength radar backscatter and circular polarization ratios associated with their interior walls but not with their proximal eject…
The Status of GSC 3870-01172 as a Member of a Triple or Quadruple System
Nelson, Robert H.; Terrell, D.
New photometry and radial velocities of the eclipsing binary GSC 3870-01172 are reported. Simultaneous analysis of the data using the Direct Distance Estimation method yields the absolute parameters, as well as the distance to the binary. A comparison of the distances and proper motions indicates that the nearby star GSC 3870-01361 may be a third …
Detections of Massive Stars in the Cluster MCM2005b77, in the Star-forming Regions GRS G331.34-00.36 (S62) and GRS G337.92-00.48 (S36)
Menten, Karl M.; Rich, R. Michael; Figer, Donald F. +2 more
Large infrared and millimeter wavelength surveys of the Galactic plane have unveiled more than 600 new bubble H II regions and more than 3000 candidate star clusters. We present a study of the candidate clusters MCM2005b72, DBS2003-157, DBS2003-172, and MCM2005b77 based on near-infrared spectroscopy taken with SofI on the NTT and infrared photomet…
Revisiting the case of R Monocerotis: Is CO removed at R < 20 au
Montesinos, B.; Bachiller, R.; Fuente, A. +4 more
Context. To our knowledge, R Mon is the only B0 star in which a gaseous Keplerian disk has been detected. However, there is some controversy about the spectral type of R Mon. Some authors propose that it could be a later B8e star, where disks are more common.
Aims: Our goal is to re-evaluate the R Mon spectral type and characterize its protop…
Flexion in Abell 2744
Bird, J. P.; Goldberg, D. M.
We present the first flexion-focused gravitational lensing analysis of the Hubble Frontier Field observations of Abell 2744 (z = 0.308). We apply a modified Analytic Image Model technique to measure source galaxy flexion and shear values at a final number density of 82 arcmin-2. By using flexion data alone, we are able to identify the p…
Detecting the solar new magnetic flux regions on the base of vector magnetograms
Golovko, A. A.; Salakhutdinova, I. I.
To understand better the origin of CME and other non-stationary processes, the detailed information about emerging flux regions must be known. The advanced method of mapping emerging magnetic flux regions through the multifractal segmentation of vector photospheric magnetograms, is created. It is free from influence of effects of projection. Maps …