scholarly journals JASMINE: constructor of the dynamical structure of the Galactic bulge

2007 ◽  
Vol 3 (S245) ◽  
pp. 355-358
Author(s):  
N. Gouda ◽  
Y. Kobayashi ◽  
Y. Yamada ◽  
T. Yano ◽  
T. Tsujimoto ◽  
...  
Keyword(s):  
High Accuracy ◽  
Dynamical Structure ◽  
Preliminary Design ◽  
Proper Motions ◽  
Galactic Bulge ◽  
Satellite Mission ◽  
Central Wavelength ◽  
Distance Data ◽  
Space Astrometry ◽  
Scientific Results

AbstractWe introduce a Japanese space astrometry project which is called JASMINE. JASMINE (Japan Astrometry Satellite Mission for INfrared Exploration) will measure distances and tangential motions of stars in the Galactic bulge with yet unprecedented precision. JASMINE will operate in z-band whose central wavelength is 0.9 micron. It will measure parallaxes, positions with accuracy of about 10 micro-arcsec and proper motions with accuracy of about 10 micro- arcsec/year for the stars brighter than z=14 mag. The number of stars observed by JASMINE with high accuracy of parallaxes in the Galactic bulge is much larger than that observed in other space astrometry projects operating in optical bands. With the completely new “map of the Galactic bulge” including motions of bulge stars, we expect that many new exciting scientific results will be obtained in studies of the Galactic bulge. One of them is the construction of the dynamical structure of the Galactic bulge. Kinematics and distance data given by JASMINE are the closest approach to a view of the exact dynamical structure of the Galactic bulge.Presently, JASMINE is in a development phase, with a target launch date around 2016. We comment on the outline of JASMINE mission, scientific targets and a preliminary design of JASMINE in this paper.

scholarly journals Infrared space astrometry project JASMINE

2007 ◽  
Vol 3 (S248) ◽  
pp. 248-251
Author(s):  
N. Gouda ◽  
Y. Kobayashi ◽  
Y. Yamada ◽  
T. Yano ◽  
Keyword(s):  
Milky Way ◽  
Development Phase ◽  
Preliminary Design ◽  
Proper Motions ◽  
Galactic Bulge ◽  
Satellite Mission ◽  
Technical Issues ◽  
Space Astrometry ◽  
Scientific Results ◽  
K Band

AbstractA Japanese plan of an infrared (z-band:0.9 μas or k-band:2.2 μas) space astrometry (JASMINE-project) is introduced. JASMINE (Japan Astrometry Satellite Mission for INfrared Exploration) will measure distances and tangential motions of stars in the bulge of the Milky Way. It will measure parallaxes, positions with an accuracy of 10 μas and proper motions with an accuracy of 10 μas/year for stars brighter than z=14 mag or k=11 mag. JASMINE will observe about ten million stars belonging to the bulge component of our Galaxy. With a completely new “map” of the Galactic bulge, it is expected that many new exciting scientific results will be obtained in various fields of astronomy. Presently, JASMINE is in a development phase, with a targeted launch date around 2016. Science targets, preliminary design of instruments, observing strategy, critical technical issues in JASMINE and also Nano-JASMINE project are described in this paper.

scholarly journals Elucidation of kinematical and dynamical structure of the Galactic bulge

2007 ◽  
Vol 3 (S245) ◽  
pp. 39-44
Author(s):  
T. Yano ◽  
N. Gouda ◽  
H. Ueda ◽  
H. Koyama ◽  
Y. Kan-ya ◽  
...  
Keyword(s):  
Space Mission ◽  
Dynamical Structure ◽  
Proper Motions ◽  
Galactic Bulge ◽  
Satellite Mission ◽  
Future Space ◽  
The Future

AbstractFuture space mission of astrometric satellite, GAIA and JASMINE (Japan Astrometry Satellite Mission for Infrared Exploration), will produce astrometric parameter, such as positions, parallaxes, and proper motions of stars in the Galactic bulge. Then kinematical information will be obtained in the future. Accordingly it is expected that our understanding of the dynamical structure will be greatly improved. Therefore it is important to make a method to construct a kinematical and dynamical structure of the Galactic bulge immediately.

scholarly journals Space Astrometry JASMINE

2007 ◽  
Vol 3 (S248) ◽  
pp. 296-297 ◽  
Author(s):  
T. Yano ◽  
N. Gouda ◽  
Y. Kobayashi ◽  
Y. Yamada ◽  
T. Tsujimoto ◽  
...  
Keyword(s):  
Near Infrared ◽  
Focal Length ◽  
Field Of View ◽  
Galactic Bulge ◽  
Satellite Mission ◽  
Fully Depleted ◽  
Thick Substrate ◽  
Trigonometric Parallaxes ◽  
Space Astrometry ◽  
Back Illuminated

AbstractJASMINE is the acronym of the Japan Astrometry Satellite Mission for INfrared (z-band: 0.9 micron) Exploration, and is planned to be launched around 2017. The main objective of JASMINE is to study the fundamental structure and evolution of the Milky Way bulge components. In order to accomplish these objectives, JASMINE will measure trigonometric parallaxes, positions and proper motions of about ten million stars in the Galactic bulge with a precision of 10 microarcsec at z = 14mag.The primary mirror for the telescope has a diameter of 75cm with a focal length of 22.5m. The back-illuminated CCD is fabricated on a 300 micron thick substrate which is fully depleted. These thick devices have extended near infrared response. The size of the detector for z-band is 3cm×3cm with 2048×2048 pixels. The size of the field of view is about 0.6deg×0.6deg by using 64 detectors on the focal plane. The telescope is designed to have only one field of view, which is different from the designs of other astrometric satellites. JASMINE will observe overlapping fields without gaps to survey a total area of about 20deg×10 deg around the Galactic bulge. Accordingly we make a “large frame” of 20deg×10 deg by linking the small frames using stars in overlapping regions. JASMINE will observe the Galactic bulge repeatedly during the mission life of about 5 years.

JASMINE – design and method of data reduction

2007 ◽  
Vol 3 (S245) ◽  
pp. 419-420
Author(s):  
Yoshiyuki Yamada ◽  
Naoteru Gouda ◽  
Taihei Yano ◽  
Yukiyasu Kobayashi ◽  
Yoshito Niwa ◽  
...  
Keyword(s):  
High Accuracy ◽  
Simulation Software ◽  
Galactic Bulge ◽  
Satellite Mission ◽  
Observation Strategy ◽  
Bulge Region ◽  
Strategy Design ◽  
Stellar Density ◽  
Very High ◽  
Dust Absorption

AbstractJapan Astrometry Satellite Mission for Infrared Exploration (JASMINE) aims to construct a map of the Galactic bulge with 10 μ arc sec accuracy. We use z-band CCD for avoiding dust absorption, and observe about 10 × 20 degrees area around the Galactic bulge region. Because the stellar density is very high, each FOVs can be combined with high accuracy. With 5 years observation, we will construct 10 μ arc sec accurate map.In this poster, I will show the observation strategy, design of JASMINE hardware, reduction scheme, and error budget. We also construct simulation software named JASMINE Simulator. We also show the simulation results and design of software.

scholarly journals Astrometric Programs by the New Hamburg Plate Measuring Machine

1994 ◽  
Vol 161 ◽  
pp. 173-176
Author(s):  
Chr. de Vegt ◽  
L. Winter ◽  
N. Zacharias
Keyword(s):  
Reference Frame ◽  
Northern Hemisphere ◽  
High Accuracy ◽  
Proper Motions ◽  
Sky Surveys ◽  
Unique Data ◽  
Large Sets ◽  
Measuring Machine ◽  
First Time

With the new Hamburg astrometric measuring machine, large sets of plates can be digitized very quickly with submicrometer accuracy. In particular about 2000 plates of the AGK2-catalog, mean epoch 1930, can be remeasured now for the first time to their limiting magnitude, about B = 11. The new AGK2-data therefore will cover practically the whole AC-catalog and TYCHO-stars in the northern hemisphere. All plates will be reduced using the HIPPARCOS results as the reference frame when available in 1996. The new AGK2-data will provide a unique data base for the determination of high accuracy proper motions (about 2 mas/yr) of all TYCHO stars in the northern hemisphere. Furthermore, for the first time a dense reference frame for a final reduction of the Astrographic Catalog (AC) and the large deep sky surveys will be generated by this catalog. The inferior situation in the southern hemisphere will be addressed briefly.

scholarly journals Astrometry and Photometry of 400 Million Stars Brighter than 18 Mag

1993 ◽  
Vol 156 ◽  
pp. 37-45
Author(s):  
E. Høg
Keyword(s):  
Proper Motions ◽  
Satellite Mission ◽  
Beam Combiner ◽  
Expected Performance ◽  
Ccd Detectors

A satellite mission for accurate astrometry and multi-colour photometry is discussed, similar in principle to the ESA Hipparcos mission and here called theRoemer mission.The limiting magnitude will be aboutV= 18 mag while 13 mag is the limit of the present Hipparcos mission. Luminosities of stars up to 2 kpc away can be obtained, corresponding to a volume 10000 times larger than with Hipparcos. A mission of 5 years will provide an accuracy of 0.1 milli-arcsec at 12th magnitude for positions and parallaxes and 0.05 milli-arcsec for annual proper motions. This is achieved by a satellite using a mosaic of CCD detectors in the focal planes of two beam-combiner telescopes of 0.29 m aperture. The instrument is described and the expected performance with an input catalog of 400 million program stars is given.

scholarly journals The Gaia mission: science, organization and present status

2007 ◽  
Vol 3 (S248) ◽  
pp. 217-223 ◽  
Author(s):  
L. Lindegren ◽  
C. Babusiaux ◽  
C. Bailer-Jones ◽  
U. Bastian ◽  
A. G. A. Brown ◽  
...  
Keyword(s):  
Proper Motions ◽  
Velocity Measurements ◽  
Expected Performance ◽  
Wide Range ◽  
Operational Lifetime ◽  
Optical Reference ◽  
Spectrophotometric Data ◽  
Space Astrometry ◽  
Technical Features ◽  
Astrometric Data

AbstractThe ESA space astrometry mission Gaia will measure the positions, parallaxes and proper motions of the 1 billion brightest stars on the sky. Expected accuracies are in the 7–25 μas range down to 15 mag and sub-mas accuracies at the faint limit (20 mag). The astrometric data are complemented by low-resolution spectrophotometric data in the 330–1000 nm wavelength range and, for the brighter stars, radial velocity measurements. The scientific case covers an extremely wide range of topics in galactic and stellar astrophysics, solar system and exoplanet science, as well as the establishment of a very accurate, dense and faint optical reference frame. With a planned launch around 2012 and an (extended) operational lifetime of 6 years, final results are expected around 2021. We give a brief overview of the science goals of Gaia, the overall project organisation, expected performance, and some key technical features and challenges.

scholarly journals JASMINE data analysis

2007 ◽  
Vol 3 (S248) ◽  
pp. 407-408
Author(s):  
Y. Yamada ◽  
N. Gouda ◽  
T. Yano ◽  
Y. Kobayashi ◽  
Y. Niwa ◽  
...  
Keyword(s):  
Data Analysis ◽  
Array Detector ◽  
Basic Design ◽  
Galactic Bulge ◽  
Reduction Scheme ◽  
Satellite Mission ◽  
Error Budget ◽  
Observation Strategy ◽  
Bulge Region ◽  
Dust Absorption

AbstractJapan Astrometry Satellite Mission for Infrared Exploration (JASMINE) aims to construct a map of the Galactic bulge with a 10 μas accuracy. We use z-band CCD or K-band array detector to avoid dust absorption, and observe about 10 × 20 degrees area around the Galactic bulge region.In this poster, we show the observation strategy, reduction scheme, and error budget. We also show the basic design of the software for the end-to-end simulation of JASMINE, named JASMINE Simulator.

New VIRAC proper motion maps show signature of galactic boxy/peanut bulge

2019 ◽  
Vol 14 (S353) ◽  
pp. 29-30
Author(s):  
Jonathan P. Clarke ◽  
Christopher Wegg ◽  
Ortwin Gerhard ◽  
Leigh C. Smith ◽  
Phil W. Lucas ◽  
...  
Keyword(s):  
Proper Motion ◽  
Dynamical Model ◽  
Line Of Sight ◽  
Selection Function ◽  
Kinematic Structure ◽  
Proper Motions ◽  
Galactic Bulge ◽  
Bulge Region ◽  
Pattern Speed ◽  
Red Clump

AbstractWe have derived absolute proper motions of stars in the Galactic bulge region combining the VVV InfraRed Astrometric Catalogue (VIRAC) and Gaia. We use the proper motions to study the kinematic structure of the bulge both integrated along the line-of-sight and in magnitude intervals using red clump stars as standard candles. In parallel we compare to a made-to-measure barred dynamical model, folding in the VIRAC selection function, to understand and interpret the structures that we observe. The barred dynamical model, which contains a boxy/peanut bulge, and has a pattern speed of 37.5 kms−1 kpc−1, is able to reproduce all structures impressively well.

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