Search Publications
Binary Star Synthetic Photometry and Distance Determination Using BINSYN
Linnell, Albert P.; Hubeny, Ivan; DeStefano, Paul
This paper extends synthetic photometry to components of binary star systems. The paper demonstrates accurate recovery of single star photometric properties for four photometric standards, Vega, Sirius, GD153, and HD209458, ranging over the HR diagram, when their model synthetic spectra are placed in fictitious binary systems and subjected to synt…
Far-Infrared and submillimeter properties of SDSS galaxies in the Herschel ATLAS science demonstration phase field
Wu, Hong; Zhu, Yi-Nan; Zhou, Zhi-Min +1 more
Using the Herschel ATLAS science demonstration phase data cross-identified with SDSS DR7 spectra, we select 297 galaxies with F250µm > 5σ. The sample galaxies are classified into five morphological types, and more than 40% of the galaxies are peculiar/compact galaxies. The peculiar galaxies show higher far-infrared/submillimete…
Electromagnetic waves observed on a flight over a Venus electrical storm
Russell, C. T.; Zhang, T. L.; Daniels, J. T. M. +3 more
The occurrence of electrical discharges in planetary atmospheres produces high temperatures and pressures enabling chemical reactions that are not possible under local thermodynamic equilibrium conditions. On Earth, electrical discharges in clouds produce nitric oxide. Similar abundances of nitric oxide exist in the Venus atmosphere, but the exist…
Infrared Observations of the Millisecond Pulsar Binary J1023+0038: Evidence for the Short-term Nature of Its Interacting Phase in 2000-2001
Morrell, Nidia; Wang, Zhongxiang; Wang, Xuebing
We report our multi-band infrared (IR) imaging of the transitional millisecond pulsar system J1023+0038, a rare pulsar binary known to have an accretion disk in 2000-2001. The observations were carried out with ground-based and space telescopes from near-IR to far-IR wavelengths. We detected the source in near-IR JH bands and Spitzer 3.6 and 4.5 &…
The multiplicity of φ Phe revisited
Pourbaix, D.; Chini, R.; Boffin, H. M. J. +1 more
Aims: The chemically peculiar B star φ Phe was, until very recently, considered to be a triple system, even though the data were not conclusive and the orbits rather uncertain. Very recent results provided a revised orbit, different from the then available astrometric Hipparcos orbit.
Methods: Additional spectroscopic data obtained with …
Ionospheric signatures of a plasma sheet rebound flow during a substorm onset
RèMe, H.; Nakamura, R.; Snekvik, K. +7 more
Magnetic reconnection in Earth's magnetotail produces fast earthward flows in the plasma sheet. Tailward flows are often observed associated with the earthward flows. Both return flow vortices at the flanks of an earthward flow channel and rebound of the earthward flow from the intense dipolar magnetic field of the inner magnetosphere have been sh…
Simultaneous traveling convection vortex events and Pc1 wave bursts at cusp latitudes observed in Arctic Canada and Svalbard
Singer, H. J.; Hartinger, M. D.; Posch, J. L. +5 more
convection vortices (TCVs), which appear in ground magnetometer records at near-cusp latitudes as solitary ~5 mHz pulses, are a signature of dynamical processes in the ion foreshock upstream of the Earth's bow shock that can stimulate transient compressions of the dayside magnetosphere. These compressions can also increase the growth rate of elect…
X-ray Observations of Eight Young Open Star Clusters: I. Membership and X-ray Luminosity
Pandey, J. C.; Singh, K. P.; Kumar, Brijesh +2 more
We present a detailed investigation of X-ray source contents of eight young open clusters with ages between 4 to 46 Myr using archival X-ray data from XMM-NEWTON. The probable cluster memberships of the X-ray sources have been established on the basis of multi-wavelength archival data, and samples of 152 pre-main sequence (PMS) low mass (<2M
Rotation of the Hyades derived from Hipparcos data
Vereshchagin, S. V.; Reva, V. G.; Chupina, N. V.
Data from the Hipparcos catalog are used to study the internal kinematics of the Hyades cluster. Cluster members whose proper motions and parallaxes are known with precisions not less than 5 mas/yr and 3 mas were used. The proper motions were reduced to the cluster center. A correlation between a component of the tangential velocity and the parall…
MN Lup: X-Rays from a Weakly Accreting T Tauri Star
Wolter, U.; Robrade, J.; Günther, H. M. +1 more
Young T Tauri stars (TTS) are surrounded by an accretion disk, which over time disperses due to photoevaporation, accretion, and possibly planet formation. The accretion shock on the central star produces an UV/optical veiling continuum, line emission, and X-ray signatures. As the accretion rate decreases, the impact on the central star must chang…