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PRESENTADO POR: Raffaella Anna Marino. COLABORADORES: A. Gil de Paz, S. Sánchez, J.C. Muñoz-Mateos, A. Castillo. UNIVERSIDAD COMPLUTENSE DE MADRID Grupo UCM de Astrofísica Instrumental y eXtragaláctica. CONTENT. THE AIM OF THIS WORK INTEGRAL FIELD SPECTROSCOPY PPAK - PowerPoint PPT Presentation
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UNIVERSIDAD COMPLUTENSE DE MADRIDGrupo UCM de Astrofísica Instrumental y eXtragaláctica
PRESENTADO POR:Raffaella Anna Marino
COLABORADORES:A. Gil de Paz, S. Sánchez,
J.C. Muñoz-Mateos, A. Castillo
1/1717/09/2010 IFS NGC5668
THE AIM OF THIS WORK INTEGRAL FIELD SPECTROSCOPY PPAK THE CASE OF NGC5668 OBSERVATIONS ANALYSIS RESULTS CONCLUSIONS FUTURE PROJECTS
CONTENTCONTENT
2/1717/09/2010 IFS NGC5668
FORMATION AND EVOLUTION OF SPIRAL GALAXIES
ADVANTAGES OF INTEGRAL FIELD SPECTROSCOPY
DUST ATTENUATION
CHEMICAL ABUNDANCE
HOW OLD ARE THE SPIRAL DISK? HOW DID THEY CHEMICALLY EVOLVE? ARE THEY GROWING INSIDE-OUT?
Hα/Hβ BALMER DECREMENT
KEWLEY & DOPITA RECIPE (2002)
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
THE AIM OF THIS WORKTHE AIM OF THIS WORK
17/09/2010 IFS NGC5668 3/17
HOW TO REGISTER 3D INFO TO THE 2D DETECTOR?
NOW: Image (+ filter): (x, y)@λ Spectroscopy (long-slit): (x, λ) @ y fixed
INTEGRAL FIELD SPECTROSCOPYINTEGRAL FIELD SPECTROSCOPY THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
Simultaneous record of the spectral and spatial information in 2D
We obtain a cube fits for exposure
Efficiency and Homogeneity
17/09/2010 IFS NGC5668
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
PPak-IFUPrinciple design focal reducer + hexagonal
packed fiber-bundle
Focal reducer lens F/10 to F/3.3, diam=50 mm
Plate-scale 17’’.85 /mm
Fiber configuration 331 object, 36 sky, 15 calibration
PPak – FoV 74’’×64’’(hexagonal packed)
Spatial sampling 2.68” per fiber diameter
Fiber pitch 3.5” fiber-to-fibercore diameter 150um
Wavelength range 400–900 nm
PPAKPPAK
4/17
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
NAME NGC 5668MORPHOLOGICAL TYPE Sc(s) II-III/SdRA(2000) 14h 33m 24.3s
Dec(2000) +04°27'02"B MAGNITUDER MAGNITUDELB
12.13 ± 0.03 mag11.28 ± 0.01 mag2.7 ± 0.6 × 109 LΘ
RADIAL VELOCITY(Hel.) 1582 ± 5 km/sD (Galactocentric GSR) 15.6 ± 1.5 MpcINCLINATION 18°Position Angle (PA) 145°MAJOR DIAMETER 3.3 arcminMINOR DIAMETER 3.0 arcminHELIOCENTRIC REDSHIFT
0.005277±0.000017MTOT 5.7 × 1010 MΘ
MTOT / LB 2.9 MΘ /LΘ,B
17/09/2010 IFS NGC5668
E
N
5/17
THE CASE OF NGCTHE CASE OF NGC56685668
SDSS
GALEX8,0 μm
3,6 μm
17/09/2010 IFS NGC5668 6/16
OBSERVATIONAL PARAMETERS
Date of observation
22/06/2007 to 24/06/2007
Telescope Calar Alto, 3.5m
Focus Cassegrain
Instrument PPAKOFF-AXIS FIBER BUNDLE IFU
Fibre projected size
2.68’’ per fiber diam.3.45’’ pitch
Field Mosaic 6 pointingsFOV = 3x2 arcmin2
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
OBSERVATIONS OBSERVATIONS (1)(1)
Pointing 5
Pointing 1
Pointing 2
Pointing 7
Pointing 3
Pointing 4
7/17 17/09/2010 IFS NGC5668
IMAGE OBS.DATE
TIME(UT)
# IMAGE
AIRMASS
texp (sec)
RA (deg)
Dec(deg)
NGC5668 p1 2007/06/22 20:59:21 3 1.207306 3x1000
218.5001 4.50243
21:36:47
NGC5668 p2 2007/06/22 22:13:53 4 1.38137 4x1000
218.5006 4.52086
23:12:31
NGC5668 p3 2007/06/22-23 23:33:44 3 1.75179 3x1000
218.4864 4.5139700:11:08
NGC5668 p7 2007/06/23 21:00:15 3 1.211576 3x1000
218.5143 4.51076
21:37:41
NGC5668 p5 2007/06/23 22:15:29 3 1.362266 3x1000
218.5008 4.48774
22:52:55
NGC5668 p4 2007/06/23-24 23:28:42 3 1.743736 3x1000
218.4861 4.49738
00:06:07
OBSERVATIONS OBSERVATIONS (2)(2) THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
17/09/2010 IFS NGC5668 8/17
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
ANALYSIS: ANALYSIS: HHIIII REGIONS REGIONS (1)(1)
17/09/2010 IFS NGC5668 9/17
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
ANALYSIS: ANALYSIS: ANNULI ANNULI (1)(1)
10/1717/09/2010 IFS NGC5668
→ IDENTIFY BAD FIBERS (Field stars or Cross Talk affected)
→ REMOVE SKYLINES
→ SUBTRACT CONTINUUM EMISSION (by using a polynomial order of 3 and 3Å of EW in Hß absortion derived from the fit to the ring spectra)
→ SELECTION OF WAVELENGTH RANGE (λλ 3700 – 6997 Å)
→ CORRECT FROM THE CONTINUUM STELLAR ABSORPTION (by using respectively concentric annuli values, 1.7 Å for Hα and 2 Å for Hβ)
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
ANALYSIS: ANALYSIS: HHIIII REGIONS REGIONS (2)(2)
→ ENDED UP WITH 17 CONCENTRIC ANNULI SPECTRA.
→ ANALYSIS WITH IDL SCRIPT fit_poblaciones WE FIND THE UNDERLYING STELLAR POPULATION BY VARY 4 PARAMETERS.
→FIND THE BEST MODEL IN THE TWO STELLAR LIBRARIES: Bruzual & Charlot (2003) AND MILES (Sánchez-Blázquez et al. 2006).
→ WE USE Charlot & Fall (2000) EXTINCTION LAW FOR STAR FORMING GALAXIES.
17/09/2010 IFS NGC5668
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
ANALYSIS: ANALYSIS: IDLIDL
11/17
12/1717/09/2010 IFS NGC5668
ANALYSISANALYSIS
13/1717/09/2010 IFS NGC5668
→ THE GENERAL TREND HAS A MEAN VALUE OF ~~1 mag, IN AGREEMENT WITH OTHER WORKS.→INCREASE IN THE OUTER REGION, WORSE S/N RATIO (the errors are much larger).→GAS ATTENUATION APPEARS LARGER THAN THE CONTINUUM ATTENUATION.→GOOD AGREEMENT WITH IDL VALUES AND E(B-V)CONTINUUM = 0.44x E(B-V)GAS.
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
RESULTS:RESULTS:DUST ATTENUATIONDUST ATTENUATION
14/1717/09/2010 IFS NGC5668
→ INWARDS OF THE OPTICAL EDGE O/H RATIO FOLLOW THE UNIVERSAL RADIAL GRADIENT.→ RANGE VALUE 8.15 ≤ 12 + log(O/H) ≤ 8.7; RBREAK = 36“ (260 kpc).→ <GRADIENT VALUE> OF -0.0346 ± 0.0074 dex/kpc (-0.0042 ± 0.0009 dex/") IN AGREEMENT Zaritsky et al.(1994).→THERE’S A DISCONTINUITY NEAR THE OPTICAL EDGE OF THE DISK (Bresolin et al. 2009).
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
RESULTS:RESULTS:CHEMICAL ABUNDANCECHEMICAL ABUNDANCE
15/1717/09/2010 IFS NGC5668
RESULTSRESULTS
15/1717/09/2010 IFS NGC5668
IN ORDER TO IMPROVE OUR KNOWLEDGE OF SPIRAL DISK WE HAVE OBTAINED A FULL 2-D SPECTRAL CUBE MOSAIC OF THE NEARBY SPIRAL GALAXY NGC5668.
WE EXTRACTED AND ANALYZED THE SPECTRA OF HII REGIONS AND CONCENTRIC ANNULI.
WE OBTAINED MAPS FOR DUST ATTENUATION OXYGEN ABUNDANCE GENERAL TREND =1.14 mag
GRADIENT VALUE = -0.0345 dex/kpc
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
CONCLUSIONCONCLUSION
17/09/2010 IFS NGC5668 16/17
→ STELLAR POPULATION USING EITHER SPECTRAL INDEX OR FULL SPECTRAL FITTING IN THE CONTEXT OF SPECTRO-PHOTOMETRIC MODELS OF GALAXY DISKS.
→ PART OF A SAMPLE OF A DOZEN GALAXIES OBSERVED WITH VIMOS (VLT) AND PPAK (IFU data) from HGRS Herschel Galaxy Reference Survey; Boselli et al. 2006.
→ CALIFA’s SURVEY: Calar Alto Legacy Integral Field-Spectroscopy Astronomical Survey.
THE AIM OF THIS WORK
IFS
PPAK
THE CASE OF NGC5668
OBSERVATIONS
ANALYSIS
RESULTS
CONCLUSION
FUTURE PROJECTS
FUTURE PROJECTSFUTURE PROJECTS
