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The global survey of star clusters in the Milky Way (MWSC) is a comprehensive list of 3061 objects that provides, among other parameters, distances to clusters based on isochrone fitting. The Tycho-Gaia Astrometric Solution (TGAS)…

The kinematics of the stellar halo hold important clues to the assembly history and mass distribution of the Galaxy. In this study, we map the kinematics of stars across the Galactic halo with the H3 Survey. We find a complex distribution…

Astrophysics of Galaxies · Physics 2024-06-21 Jiwon Jesse Han , Charlie Conroy , Dennis Zaritsky , Ana Bonaca , Nelson Caldwell , Vedant Chandra , Yuan-Sen Ting

The growing ``Hubble tension'' has prompted the need for precise measurements of cosmological distances. This paper demonstrates a purely geometric approach for determining the distance to extragalactic binaries through a joint analysis of…

Cosmology and Nongalactic Astrophysics · Physics 2024-12-13 Yu-Yang Songsheng , Jian-Min Wang , Yuan Cao , XueFei Chen , JianPing Xiong , Zhi-Xiang Zhang , Rong-Gen Cai

The spiral structure of the Milky Way is nowadays receiving renewed attention thanks to the combined efforts of observational campaigns in different wavelength regimes, from the optical to the radio. We start in the paper the exploration of…

Astrophysics of Galaxies · Physics 2015-06-03 Giovanni Carraro

Upcoming or future deep galaxy samples with wide sky coverage can provide independent measurement of the kinematic dipole - our motion relative to the rest frame defined by the large-scale structure. Such a measurement would present an…

Cosmology and Nongalactic Astrophysics · Physics 2015-11-11 Mijin Yoon , Dragan Huterer

The kinematic parameters identified from high-velocity stars situated within 100 kpc are examined and analyzed. We included three high velocity programs comprising 591, 87, and 519 stars as a function of distances ranging from 0.10 to…

Solar and Stellar Astrophysics · Physics 2025-01-23 W. H. Elsanhoury

M giants, with their distinctive properties such as high luminosity, serve as excellent indicators for mapping the structure of the Milky Way. The distance to distant M giants can be determined by using the color-magnitude relation (CMR),…

Solar and Stellar Astrophysics · Physics 2025-03-03 Xiaoyu Tang , Chaojie Hao , Jing Li , Zhengzhou Yan , Ye Xu , Jing Zhong , Zehao Lin , Yingjie Li , Dejian Liu , Longfei Ding , Xiaofang Long

The [O II] lambda3727 emission lines and absorption features from stellar Balmer and Ca H&K lines are the most accessible kinematic diagnotics in galaxies at z~1. We investigate the kinematics of 22 local late-type galaxies using these…

Astrophysics · Physics 2007-05-23 Chip Kobulnicky , Karl Gebhardt

Aiming at deriving a statistically well-justified Galactic Center distance, $R_0$, and reducing any occurrence of publication bias, we compiled the most comprehensive and most complete database of Galactic Center distances available to…

Astrophysics of Galaxies · Physics 2016-11-15 Richard de Grijs , Giuseppe Bono

Observations of the high energy sky, mainly with the INTEGRAL satellite, have raised new questions about the formation and evolution of High Mass X-ray Binaries (HMXBs). The number of detected HMXBs of different types is now high enough to…

High Energy Astrophysical Phenomena · Physics 2013-02-18 A. Coleiro , S. Chaty

In the era of precision cosmology it is essential to determine the Hubble Constant with an accuracy of 3% or better. Currently, its uncertainty is dominated by the uncertainty in the distance to the Large Magellanic Cloud (LMC) which as the…

The Large Magellanic Cloud (LMC), the closest star forming galaxy with low metallicity, provides an ideal laboratory to study star formation in such an environment. The classical dense molecular gas thermometer NH3 is rarely available in a…

Astrophysics of Galaxies · Physics 2017-03-22 X. D. Tang , C. Henkel , C. -H. R. Chen , K. M. Menten , R. Indebetouw , X. W. Zheng , J. Esimbek , J. J. Zhou , Y. Yuan , D. L. Li , Y. X. He

We derive the stellar rotation curve of the Galaxy in the range of Galactocentric radii of R=4-16 kpc at different vertical heights from the Galactic plane of z between -2 and +2 kpc. We used the PPMXL survey, which contains the USNO-B1…

Astrophysics of Galaxies · Physics 2015-06-18 Martin Lopez-Corredoira

Different measurements of the Hubble constant ($H_{0}$) are not consistent and a tension between the CMB based methods and cosmic distance ladder based methods has been observed. Measurements from various distance based methods are also…

Cosmology and Nongalactic Astrophysics · Physics 2020-06-23 Rahul Kumar Thakur , Shashikant Gupta , Rahul Nigam , PK Thiruvikraman

We present distances to 56 molecular clouds within $10\degr \leq l \leq 20\degr$ and $|b| \leq 5.25\degr$ from the Milky Way Imaging Scroll Painting (MWISP) $^{12}$CO survey, 47 of which are first-time determinations. The molecular clouds…

Astrophysics of Galaxies · Physics 2026-04-20 Juan Mei , Zhiwei Chen , Min Fang , Miaomiao Zhang , Shiyu Zhang , Zhibo Jiang

In the past several years high resolution kinematic data sets from Milky Way satellite galaxies have confirmed earlier indications that these systems are dark matter dominated objects. Further understanding of what these galaxies reveal…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Louis E. Strigari

The mechanism responsible for the warp of our Galaxy, as well as its dynamical nature, continues to remain unknown. With the advent of high precision astrometry, new horizons have been opened for detecting the kinematics associated with the…

Astrophysics of Galaxies · Physics 2017-05-17 E. Poggio , R. Drimmel , R. L. Smart , A. Spagna , M. G. Lattanzi

We report trigonometric parallax and proper motion measurements of 6.7-GHz CH3OH and 22-GHz H2O masers in eight high-mass star-forming regions (HMSFRs) based on VLBA observations as part of the BeSSeL Survey. The distances of these HMSFRs…

Near-future surveys promise a dramatic improvement in the number and precision of astrometric, photometric and spectroscopic measurements of stars in the Milky Way's disk. We examine the impact of such surveys on our understanding of the…

Astrophysics of Galaxies · Physics 2009-06-25 T. Sumi , K. V. Johnston , S. Tremaine , D. N. Spergel , S. R. Majewski

With Cosmicflows-4, distances are compiled for 55,877 galaxies gathered into 38,065 groups. Eight methodologies are employed, with the largest numbers coming from the correlations between the photometric and kinematic properties of spiral…

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