Results 61 to 70 of about 2,697 (212)
An OGLE view of the bulge and Sagittarius [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe use observations of OGLE-III ab-type RRLyrae stars towards the Galactic centre (Soszyński et al. 2011, AcA 6,1) to study the metallicity and 3D spatial distribution of the old and metal-poor component of the Galactic bulge. Metallicities and distances to the RRLyrae stars are derived photometrically from Fourier-component analyses of their ...
Raoul Haschke, Shoko Jin, Eva K. Grebel
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Dynamical Inference from Polarized Light Curves of Sagittarius A*
The Astrophysical JournalPolarimetric light curves of Sagittarius A* (Sgr A*) sometimes exhibit loops in the Stokes Q and U plane over time, often interpreted as orbiting hotspot motion. In this work, we apply the differential geometry of planar curves to develop a new technique
Angelo Ricarte +5 more
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Herpetofauna of Katerniaghat Wildlife Sanctuary, Uttar Pradesh, India
Journal of Threatened Taxa, 2012 A herpetofaunal inventory based on field surveys, literature records and photographic records is presented for Katerniaghat Wildlife Sanctuary and its environs, situated in the Terai region of Uttar Pradesh, India.
Abhijit Das +3 more
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Galactic substructure traced by RR Lyraes in SDSS Stripe 82
EPJ Web of Conferences, 2012 Using a sample of 407 RR Lyrae stars extracted from SDSS Stripe 82, we study the degree of substructure in the Galactic halo. We identify overdensities associated with the known substructures of the Hercules-Aquila Cloud and the Sagittarius Stream, and ...
Watkins L.
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An Inward-moving and Asymmetric Velocity Wave Detected in LAMOST-Gaia
The Astrophysical Journal LettersThe phase space, as coded by kinematic parameters and chemical abundances, is crucial for understanding the formation of the Galactic disk. Using red giant stars from the Galactic thin disk with [Fe/H] > − 0.8 and low- α ratios identified in LAMOST-Gaia,
Yuqin Chen +5 more
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The Core Mass Function across Galactic Environments. IV. The Galactic Center
The Astrophysical JournalThe origin of the stellar initial mass function (IMF) and how it may vary with galactic environment is a matter of debate. Certain star formation theories involve a close connection between the IMF and the core mass function (CMF), so it is important to ...
Alva V. I. Kinman +4 more
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On Sagittarius A* - Theory and Observations
, 2010 Massive and supermassive dust spheres (with a zero internal pressure) collapse to full globes of finite volumes, whose surfaces have the properties of the event horizon around a mass-point. This fact explains the observational data concerning Sagittarius A* (SgrA*). By virtue of Hilbert's repulsive effect, both the event horizon of a mass-point and the
Loinger, A., Marsico, T.
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Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry
The Astrophysical JournalEvent Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez +5 more
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The inner 300 parsecs of the Milky Way seen by H.E.S.S.: a Pevatron in the Galactic Centre
EPJ Web of Conferences, 2017 The Galactic Centre region has been observed by the High Energy Stereoscopic System (H.E.S.S.) array of ground-based Cherenkov telescopes since 2004 leading to the detection of the very-high-energy γ-ray source HESS J1745-290 spatially coincident with ...
Moulin Emmanuel
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, 2021 Hydrochus sagittarius Perkins Figs. 2, 32 Hydrochus sagittarius Perkins 2019: 20. Originally described from Venezuela. Additional locality data records reported from Peru (Perkins, 2020c). The following specimen records are from Panama. Images of the habitus and male genitalia of the holotype are given in Perkins (2019c).
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