scholarly journals The Ariel V Sky Survey Instrument and new Observations of the Milky Way

1976 ◽  
Vol 176 (3) ◽  
pp. 609-620 ◽  
Author(s):  
G. Villa ◽  
C. G. Page ◽  
M. J. L. Turner ◽  
B. A. Cooke ◽  
M. J. Ricketts ◽  
...  
Keyword(s):  
Milky Way ◽  
Survey Instrument ◽  
Sky Survey

scholarly journals CONSTRAINTS ON THE SHAPE OF THE MILKY WAY DARK MATTER HALO FROM JEANS EQUATIONS APPLIED TO SLOAN DIGITAL SKY SURVEY DATA

2012 ◽  
Vol 758 (1) ◽  
pp. L23 ◽  
Author(s):  
Sarah R. Loebman ◽  
Željko Ivezić ◽  
Thomas R. Quinn ◽  
Fabio Governato ◽  
Alyson M. Brooks ◽  
...  
Keyword(s):  
Dark Matter ◽  
Survey Data ◽  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Dark Matter Halo ◽  
Sky Survey

scholarly journals The Milky Way Revealed by Variable Stars. I. Sample Selection of RR Lyrae Stars and Evidence for Merger History

2022 ◽  
Vol 258 (1) ◽  
pp. 20
Author(s):  
Iminhaji Ablimit ◽  
Gang Zhao ◽  
Uy. Teklimakan ◽  
Jian-Rong Shi ◽  
Kunduz Abdusalam
Keyword(s):  
Milky Way ◽  
Sample Selection ◽  
Variable Stars ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Sky Survey ◽  
Spectroscopic Information ◽  
History Of ◽  
Dual Origin ◽  
Lyrae Stars

Abstract In order to study the Milky Way, RR Lyrae (RRL) variable stars identified by Gaia, ASAS-SN, and ZTF sky survey projects have been analyzed as tracers in this work. Photometric and spectroscopic information of 3417 RRLs including proper motions, radial velocity, and metallcity are obtained from observational data of Gaia, LAMOST, GALAH, APOGEE, and RAVE. Precise distances of RRLs with typical uncertainties less than 3% are derived by using a recent comprehensive period–luminosity–metallicity relation. Our results from kinematical and chemical analysis provide important clues for the assembly history of the Milky Way, especially for the Gaia–Sausage ancient merger. The kinematical and chemical trends found in this work are consistent with those of recent simulations that indicated that the Gaia–Sausage merger had a dual origin in the Galactic thick disk and halo. As recent similar works have found, the halo RRL sample in this work contains a subset of radially biased orbits besides a more isotropic component. This higher orbital anisotropy component amounts to β ≃ 0.8, and it contributes between 42% and 83% of the halo RRLs at 4 < R( kpc) < 20.

A discussion on infared astronomy - A far infrared sky survey

1969 ◽  
Vol 264 (1150) ◽  
pp. 267-271 ◽  
Keyword(s):  
Milky Way ◽  
Angular Resolution ◽  
Thermal Emission ◽  
Far Infrared ◽  
The Moon ◽  
Sky Survey ◽  
Upper Limits ◽  
Celestial Sphere ◽  
Thick Source ◽  
Thin Source

A balloon-borne instrument for making far infrared sky surveys with 2° angular resolution is described. In two initial flights at a wavelength of 320 μm approximately half of the celestial sphere including most of the northern milky way was surveyed. The thermal emission of the moon was alone detected. The upper limit to the flux from other sources was 3 x 10-12 W cm-2 in the 300 to 360 μm band, or approximately 2 x 10-23 W cm-2 Hz-1. A blackbody (optically thick) source 2° or greater in diameter yielding this flux would have a temperature of 10 °K. A warmer, small or optically thin source providing this much radiation in the Rayleigh-Jeans tail of the Plank distribution would have a temperature averaged over the 2° beam of 0.6 °K. These observations can be used to set upper limits to the opacity and temperature of interstellar grains.

scholarly journals THE MILKY WAY TOMOGRAPHY WITH SLOAN DIGITAL SKY SURVEY. IV. DISSECTING DUST

2012 ◽  
Vol 757 (2) ◽  
pp. 166 ◽  
Author(s):  
Michael Berry ◽  
Željko Ivezić ◽  
Branimir Sesar ◽  
Mario Jurić ◽  
Edward F. Schlafly ◽  
...  
Keyword(s):  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

scholarly journals Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

2017 ◽  
Vol 154 (1) ◽  
pp. 28 ◽  
Author(s):  
Michael R. Blanton ◽  
Matthew A. Bershady ◽  
Bela Abolfathi ◽  
Franco D. Albareti ◽  
Carlos Allende Prieto ◽  
...  
Keyword(s):  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Nearby Galaxies

scholarly journals NUMERICAL COLOR-MAGNITUDE DIAGRAM ANALYSIS OF SLOAN DIGITAL SKY SURVEY DATA AND APPLICATION TO THE NEW MILKY WAY SATELLITES

2008 ◽  
Vol 135 (4) ◽  
pp. 1361-1383 ◽  
Author(s):  
J. T. A. de Jong ◽  
H.-W. Rix ◽  
N. F. Martin ◽  
D. B. Zucker ◽  
A. E. Dolphin ◽  
...  
Keyword(s):  
Survey Data ◽  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Magnitude Diagram ◽  
Diagram Analysis

scholarly journals Stellar Content of Local Group Galaxies - An Introduction

1999 ◽  
Vol 192 ◽  
pp. 3-16 ◽  
Author(s):  
Sidney van den Bergh
Keyword(s):  
Milky Way ◽  
Local Group ◽  
Large Fraction ◽  
Polar Group ◽  
Stellar Content ◽  
Groups Of Galaxies ◽  
Ic 10 ◽  
Sky Survey ◽  
Group Members ◽  
Ngc 6822

In The Realm of the Nebulae, Hubble (1936) first drew attention to the fact that the Milky Way system and the Andromeda galaxy belong to a small cluster that also contains M32, M33, the Magellanic Clouds, NGC 205, NGC 6822 and IC 1613. Hubble also listed IC 10 as a possible member of what he referred to as “the Local Group”. Inspection of the prints of the Palomar Sky Survey shows (van den Bergh 1962) that a large fraction of all field galaxies are located in such small groups or clusters. Our Milky Way system therefore appears to be situated in a rather typical region of space. All of the well-established Local Group members that are listed above are at distances D ≤ 1.0 Mpc. A conservative limit D < 1.5 Mpc may therefore be used to search for new Local Group members. An additional criterion for physical membership in the Local Group is that a candidate member with solar apex distance θ and radial velocity Vr should lie close to the Vr versus cos θ relation for well-established Local Group members (Courteau & van den Bergh 1999). Finally candidates may be disqualified from membership if they appear projected on nearby groups of galaxies that are centered at distances greater than 1.5 Mpc. In particular the Local Group candidates NGC 1560, NGC 1569, UGC-A86 and Cassiopeia 1 were excluded because they appear projected on (or near) the IC 342/Maffei group. Furthermore NGC 55 and UKS 2323-326 were excluded because they appear projected on (or near) the Sculptor (= South Polar) group. Observational data on 35 probable Local Group members are given in Table 1.

scholarly journals New HI Features of the Magellanic System

1999 ◽  
Vol 190 ◽  
pp. 51-55 ◽  
Author(s):  
M. E. Putman ◽  
B. K. Gibson ◽  
L. Staveley-Smith
Keyword(s):  
Milky Way ◽  
Spiral Structure ◽  
Magellanic Clouds ◽  
The Body ◽  
The South ◽  
Sky Survey ◽  
Gravitational Model ◽  
Celestial Pole ◽  
First Results ◽  
Magellanic System

The first results from the HI Parkes All-Sky Survey (HIPASS) provide a spectacular view of the global HI distribution in the vicinity of the Magellanic Clouds and the southern Milky Way. A 2400 square degree mosaic around the South Celestial Pole (SCP) reveals the existence of a narrow, continuous counter-stream which “leads” the direction of motion of the Clouds, i.e., opposite in direction to the Stream. This strongly supports the gravitational model for the Stream in which the leading and trailing streams are tidally torn from the body of the Magellanic Clouds. The data also reveal additional tidal features in the Bridge region which appear to emanate from the LMC, and a distinct spiral structure within the LMC itself.

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