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Related papers: Kinematics and Composition of the Galactic Bulge: …

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A method based on Lucy (1974, AJ 79, 745) iterative algorithm is developed to invert the equation of stellar statistics for the Galactic bulge and is then applied to the K-band star counts from the Two-Micron Galactic Survey in a number of…

Astrophysics · Physics 2009-10-31 M. Lopez-Corredoira , P. L. Hammersley , F. Garzon , E. Simonneau , T. J. Mahoney

Based on published sources, we have created a kinematic database on 220 massive (>10 solar masses) young Galactic star systems located within <3 kpc of the Sun. Out of them, approximately 100 objects are spectroscopic binary and multiple…

Astrophysics of Galaxies · Physics 2013-07-08 V. V. Bobylev , A. T. Bajkova

We present radial velocities for approximately 40 stars in each of three optically obscured, off-axis, fields toward the Galactic bulge. Combined with the data presented by Blum et al. (1994), we now have mean radial velocities and radial…

Astrophysics · Physics 2016-08-30 Robert Blum , John Carr , Kris Sellgren , Don Terndrup

We present the stellar kinematics across the Galactic bulge and into the disk at positive longitudes from the SDSS-III APOGEE spectroscopic survey of the Milky Way. APOGEE includes extensive coverage of the stellar populations of the bulge…

The mass of the Galactic bulge, $M_B$, is estimated from the tensor virial theorem. By including the effects of a barred stellar distribution and figure rotation (81 \kms kpc $^{-1}$) and by assuming that the bar is oriented at $\theta$ $=$…

Astrophysics · Physics 2016-08-30 Robert Blum

The Milky Way Bulge extra-tidal star survey (MWBest) is a spectroscopic survey with the goal of identifying stripped globular cluster stars from inner Galaxy clusters. In this way, an indication of the fraction of metal-poor bulge stars…

Accurate and radially extended stellar kinematic data reaching R=97'' from the center are presented for the cD galaxy of Fornax, NGC 1399. The stellar rotation is small (<= 30 km/s); the stellar velocity dispersion remains constant at…

Astrophysics · Physics 2009-10-31 R. P. Saglia , Andi Kronawitter , Ortwin Gerhard , Ralf Bender

An observational survey of stars selected from the region of sky in the direction of the Galactic bulge is presented. We discuss the choice of tracer populations for this study. Digitised UK Schmidt plate photometry, calibrated with CCD…

Astrophysics · Physics 2015-06-24 Rodrigo Ibata , Gerard Gilmore

We present numerical studies of the properties of the stellar velocity distribution in galactic disks which have developed a saturated, two-armed spiral structure. In previous papers we used the Boltzmann moment equations (BME) up to second…

Astrophysics · Physics 2016-01-27 Christian Theis , Eduard Vorobyov

Studies of the kinematics of gaseous halos in some spiral galaxies have shown that the rotational velocity of the gas decreases with height above the midplane (z). This vertical velocity gradient has been observed in both the neutral and…

Astrophysics · Physics 2007-05-23 G. H. Heald , R. J. Rand , R. A. Benjamin , J. A. Collins , J. Bland-Hawthorn

Based on high-resolution spectra obtained during gravitational microlensing events we present a detailed elemental abundance analysis of 32 dwarf and subgiant stars in the Galactic bulge. [ABRIDGED], we now have 58 microlensed bulge dwarfs…

This is the first paper presenting our long-term project aimed at studying the nature of bulges through the analysis of their stellar population gradients. We present deep spectroscopic observations along the minor axis and the data…

Astrophysics · Physics 2009-11-13 J. Gorgas , P. Jablonka , P. Goudfrooij

We present orbit analysis for a sample of 8 inner bulge globular clusters, together with one reference halo object. We used proper motion values derived from long time base CCD data. Orbits are integrated in both an axisymmetric model and a…

Astrophysics of Galaxies · Physics 2018-06-13 A. Pérez-Villegas , L. Rossi , S. Ortolani , S. Casotto , B. Barbuy , E. Bica

Near infrared images from the COBE satellite presented the first clear evidence that our Milky Way galaxy contains a boxy shaped bulge. Recent years have witnessed a gradual paradigm shift in the formation and evolution of the Galactic…

Astrophysics of Galaxies · Physics 2015-12-09 Juntai Shen , Zhao-Yu Li

The detailed structure of the Galactic bulge still remain uncertain. The strong difficulties of obtaining observations of stars in the Galactic bulge have hindered the acquisition of a kinematic representation for the inner kpc of the Milky…

Astrophysics of Galaxies · Physics 2015-06-04 M. Soto , K. Kuijken , R. M. Rich

We confirm, quantify, and provide a table of the coherent velocity substructure of the Milky Way disk within 2 kpc of the Sun towards the Galactic anticenter, with 0.2 kpc resolution. We use the radial velocities of ~340,000 F-type stars…

Astrophysics of Galaxies · Physics 2017-10-11 Alan N. Pearl , Heidi Jo Newberg , Jeffrey L. Carlin , R. Fiona Smith

The chemical abundances measured in stars of the Galactic bulge offer an unique opportunity to test galaxy formation models as well as impose strong constraints on the history of star formation and stellar nucleosynthesis. The aims of this…

Astrophysics of Galaxies · Physics 2015-05-20 Gabriele Cescutti , Francesca Matteucci

Context. The formation and evolution of the Milky Way bulge is still largely an unanswered question. One of the most essential observables needed in its modelling are the metallicity distribution and the trends of the alpha elements as…

Astrophysics of Galaxies · Physics 2014-12-10 N. Ryde , M. Schultheis

We derive circular velocity curves (CVCs) from stellar dynamical models for $\sim6000$ nearby galaxies in the final data release of the Sloan Digital Sky Survey-IV MaNGA survey with integral-field spectroscopy, exploring connections between…

Astrophysics of Galaxies · Physics 2025-10-02 Kai Zhu , Michele Cappellari , Shude Mao , Shengdong Lu , Ran Li , Yong Shi , David A. Simon , Youquan Fu , Xiaohan Wang

We present radial velocities for a sample of 723 planetary nebulae (PNe) in the disk and bulge of M31, measured using the WYFFOS fibre spectrograph on the William Herschel telescope. Velocities are determined using the [OIII] 5007 Angstrom…