ELT instrumenti

1
Instrumenti un programmas nakotnes
diteleskopiem Dainis Dravin Lundas
Observatorija, Zviedrija Latvijas Universitates
65. konference, 2007.g. februari
2
ODIEN
3
(No Transcript)
4
RIT
5
ALMA (2010 ?)
6
PARIT
7
42-m ELT (2017 ?)
8
CODEX COsmic Dynamics EXperiment
9
JAU AIZVAKAR
10

11
Signal is SMALL! Change in sign is a
signature of the non-zero cosmological constant O
? fraction of energy density as a cosmological
constant (dark energy) Om matter density
(baryons dark matter) CDM Cold dark
matter SCDM No cosmological constant
12
CODEX HOW TO MEASURE THIS SIGNAL? MASERS Lines
are very narrow and measurements accurate but
sources are inside huge potential wells large
peculiar motions are expected RADIO GALAXIES
WITH ALMA Also, local motions of the emitters
are limiting. Observed radio galaxies vary more
than the expected signal LYMAN-ALPHA FOREST
Absorption in front of high-Z quasars are most
promising candidates. Ly? forest and metal lines
seem to be produced in a warm intergalactic
medium following the Hubble flow !
13
OBSERVING THE INTERGALACTIC MEDIUM
QSO
Cosmological 3-D hydrodynamic simulation (5123
gas 5123 dark). Density map each bright point
is a group of galaxies evolved within a
cold-dark-matter cosmology. Image width 400
Mpc. (James Wadsley)
14
QSO absorption lines
Quasar
To Earth
Lyaem
CIV
SiII
SiIV
CII
SiII
Lyman limit
Lya
Lyb
Lybem
NVem
Lya forest
CIVem
SiIVem
15
CODEX Simulated signal over 107 years
16
(No Transcript)
17
CODEX Unit Spectrograph (Delabre Dekker)
Crossdisperser section 1
Transfer Collimator
Camera
VPHG 10 x 10 cm
To Crossdisperser section 2
Strip mirror
TMA Collimator
Light from slicer enters here
Main Disperser section
Echelle mosaic 22 x 170 cm
Only one crossdisperser section is shown.
Overall optics volume 3 m x 1 m x 1.5 m
18
QuantEYE Quantum Optics Instrumentation for
Astronomy
19

• D. Dravins 1, C. Barbieri 2
• V. Da Deppo 3, D. Faria 1, S. Fornasier 2
• R. A. E. Fosbury 4, L. Lindegren 1
• G. Naletto 3, R. Nilsson 1, T. Occhipinti 3
• F. Tamburini 2, H. Uthas 1, L. Zampieri 5
• (1) Lund Observatory
• (2) Dept. of Astronomy, Univ. of Padova
• (3) Dept. of Information Engineering, Univ. of
  Padova
• (4) ST-ECF, ESO Garching
• (5) Astronomical Observatory of Padova

20
TERMISKS STAROJUMS ---
IZKLIEDETA GAISMA ---
KRASU UN POLARIZACIJAS FILTRI
LAZERS ---
KOHERENTA ---
TELESKOPS
SINHOTRONA ---
CERENKOVA ---
21
Intensitates interferometrija
Narrabri stellar intensity interferomer circa
1970 (R.Hanbury Brown, R.Q.Twiss et al.,
University of Sydney)
22
(No Transcript)
23
FOTONU STATISTIKA
24
Roy Glauber Nobela premija fizika Stokholma,
2005. g. decembri
25
Kosmisks gadijuma lazers
AKTIVA VIDE


AKTIVA VIDE


SPOGULI

LABORATORIJAS LAZERS
KOSMISKS LAZERS
D.Wiersma, Nature,406, 132 (2000)
26
Model of a compact gas condensation near ? Car
with its Strömgren boundary between photoionized
(H II) and neutral (H I) regions
S. Johansson V. S. Letokhov Laser Action in a
Gas Condensation in the Vicinity of a Hot
Star JETP Lett. 75, 495 (2002) Pisma
Zh.Eksp.Teor.Fiz. 75, 591 (2002)
27
E-ELT ?