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AKARI IRC survey of the Large Magellanic Cloud Yoshifusa Ita, Daisuke Kato,Takashi Onaka, & AKARI LMC team 2012/Feb/27-29 AKARI2 @ Jeju 1

AKARI IRC survey of the Large Magellanic Cloud

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AKARI IRC survey of the Large Magellanic Cloud. Yoshifusa Ita, Daisuke Kato,Takashi Onaka, & AKARI LMC team. Index. Part 1 A brief summary of the AKARI IRC LMC survey Part 2 A brief description of the AKARI LMC point source catalog Part 3 - PowerPoint PPT Presentation

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Page 1: AKARI IRC survey of the Large Magellanic Cloud

AKARI IRC surveyof the Large Magellanic Cloud

Yoshifusa Ita,

Daisuke Kato,Takashi Onaka,

&

AKARI LMC team

2012/Feb/27-29 AKARI2 @ Jeju 1

Page 2: AKARI IRC survey of the Large Magellanic Cloud

Index

Part 1 A brief summary of the AKARI IRC LMC survey

Part 2 A brief description of the AKARI LMC point source

catalog Part 3

A brief introduction of published results using the early survey data

2012/Feb/27-29 AKARI2 @ Jeju 2

Page 3: AKARI IRC survey of the Large Magellanic Cloud

Part 1: A brief summary of the AKARI IRC LMC survey

2012/Feb/27-29 AKARI2 @ Jeju 3

Page 4: AKARI IRC survey of the Large Magellanic Cloud

The AKARI IRC LMC surveyPI. Prof. Onaka Takashi

Observation ~600 pointings 2006/Feb - 2007/July About 10 degree^2

Photometry 3.2, 7, 11, 15, 24 um

Spectroscopy NP (2.5 - 5.0 um) λ/Δλ ~ 20

2012/Feb/27-29 AKARI2 @ Jeju 4

Observed area

= 10’ x 10‘

Page 5: AKARI IRC survey of the Large Magellanic Cloud

Comparison to the other surveys

Orange AKARI survey ~10 deg^2

Pink South Africa IRSF/SIRIUS JHK

survey ~ 6.3 deg x 6.3 deg Green

Spitzer SAGE survey ~ 7 deg x 7 deg

Cyan Zaritsky Optical (UBVI) survey

~ 8.5 x 7.5 deg

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Page 6: AKARI IRC survey of the Large Magellanic Cloud

Comparison to the SAGE survey: λ and spectroscopy

AKARI has 11 and 15μm imaging bands, which fill the gap between the IRAC and MIPS. see next page

In addition to the photometric data, we also took low resolution (λ/Δλ ~ 20) 2.5 ~ 5 μm spectral data.

2012/Feb/27-29 AKARI2 @ Jeju 6

AKARI

SAGE/Spitzer

An o-rich AGBstar

A c-rich AGBstar

Page 7: AKARI IRC survey of the Large Magellanic Cloud

5 sigma detection limits

2012/Feb/27-29 AKARI2 @ Jeju 7

IRC+10216: an extreme c-rich AGB star

AB Aur : a Herbig Ae/Be star

β And: a tip of the RGB star

Page 8: AKARI IRC survey of the Large Magellanic Cloud

2.5-5um spectra for sources in the observed 10 deg^2 field.

2012/Feb/27-29 AKARI2 @ Jeju 8

Refer to Shimonishi’s Talk for initial results using thespectroscopic data

FOV = 10’ x 10’

Page 9: AKARI IRC survey of the Large Magellanic Cloud

Summary of the survey

A 10 deg^2 area was observed with AKARI Imaging data

3.2, 7.0, 11, 15, 24 um detection limits are comparable to those of the SAGE

survey Spectroscopic data

2.5 – 5.0 um, λ/Δλ ~ 20

The point source catalog is coming soon. (Kato, Ita, and Onaka et al.)

2012/Feb/27-29 AKARI2 @ Jeju 9

Unique to AKARI

Page 10: AKARI IRC survey of the Large Magellanic Cloud

Part 2: A brief description of the AKARI IRC LMC point source catalog

2012/Feb/27-29 AKARI2 @ Jeju 10

Page 11: AKARI IRC survey of the Large Magellanic Cloud

Catalog compilation (1)Image data reduction

The latest IRC imaging data reduction toolkit ver.20110304 was used. Ask Egusa-san for details.

Page 12: AKARI IRC survey of the Large Magellanic Cloud

Catalog compilation (2)Source detection and photometry

Source detection IRAF/DAOFIND

Photometry IRAF/DAOPHOT PSF fitting photometry

N3: satellite jitter → PSF vary in each image S7~L24: insensitive to the jitter → grand PSF

Calibration ADU to Jy conversion factors (Tanabe et al. 2008)

Page 13: AKARI IRC survey of the Large Magellanic Cloud

Catalog compilation (3)Detection limits and Completeness Detection Limits (10σ, vega-mag)

Completeness Limits (90% recovery limit) Add artificial sources to images

Dense, Medium, Blank region (source number density) Source extraction Count the recovery rate

Comparable to the 10σ detection limits except N3, which is about 2mag shallower.

Page 14: AKARI IRC survey of the Large Magellanic Cloud

an example : N3magnitude vs. error

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Page 15: AKARI IRC survey of the Large Magellanic Cloud

Catalog compilation (4)Astrometric Calibration Referenced to

2MASS catalog positions with a condition that at least 5 sources should be mached.

If matching with 2MASS positions failed Alternative reference : Spitzer SAGE catalog In some cases, matching with SAGE catalog failed due to

small number of sources in the FOV S11 : 1 images, L15 : 5 images, L24 : 74 images

Internal Positional Accuracy 0.6” at N3, 0.3” at S7, and S11, 1.0” at L15 and L24

Page 16: AKARI IRC survey of the Large Magellanic Cloud

Catalog compilation (5)Flagging

Artifact Identification mux-bleed, column pulldown, and ghosts

any sources within ±5 pixel belt area are flagged ghosts (inc. suspected ones) are flagged

Multi-detected sources Only the best S/N data is adopted

Final Products Archive

lists all detected sources more fainter sources, but with false detections

Catalog only lists sources with SAGE counterparts

more reliable

Page 17: AKARI IRC survey of the Large Magellanic Cloud

Figures from Kato’s paperTwo-Color diagram

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pink: YSO candidatescyan: background galaxyGruendl & Chi(2009)

blue: Naked starsorange: dusty O-rich starsgreen: dusty C-rich starsred: YSOs

Page 18: AKARI IRC survey of the Large Magellanic Cloud

Figures from Kato’s paperColor-Magnitude diagram

2012/Feb/27-29 AKARI2 @ Jeju 18

pink: YSO candidatescyan: background galaxyGruendl & Chi(2009)

Page 19: AKARI IRC survey of the Large Magellanic Cloud

Summary of the point source catalog Two types of point source catalogs.

Archive include all detected sources

Catalog only include sources with SAGE counterparts

The point source catalog will be in public right after the acceptance of paper. (submitted to ApJ soon)

We want to release imaging data as well. an GUI I/F to search images is needed.

Page 20: AKARI IRC survey of the Large Magellanic Cloud

Part 3: A brief introduction of published results using the survey data

2012/Feb/27-29 AKARI2 @ Jeju 20

Page 21: AKARI IRC survey of the Large Magellanic Cloud

Refereed Papers using AKARI/LMC data published so far. Mori, Tamami I. et al., 2012,ApJ,744,68

Observations of the near- to Mid-infrared Unidentified Emission Bands in the Interstellar Medium of the Large Magellanic Cloud

Ngeow, Chow-Choong et al., 2010,MNRAS,408,983 Cepheid period-luminosity relation from the AKARI observations

Shimonishi, T. et al., 2010,A&A,514,12 Spectroscopic observations of ices around embedded young stellar objects in the Large

Magellanic Cloud with AKARI

Seok, Ji Yeon et al., 2008,PASJ,60,453 Supernova Remnants in the AKARI IRC Survey of the Large Magellanic Cloud

Shimonishi, T., et al., 2008,ApJ,686,99 AKARI Near-Infrared Spectroscopy: Detection of H2O and CO2 Ices toward Young Stellar

Objects in the Large Magellanic Cloud

Ita, Y., et al., 2008,PASJ,60,435, AKARI IRC Survey of the Large Magellanic Cloud: Outline of the Survey and Initial

Results

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Page 22: AKARI IRC survey of the Large Magellanic Cloud

Ngeow, Chow-Choong et al., 2010,MNRAS,408,983

Matched catalog with known Cepheid variables in the LMC.

P-L relation is derived. important results to the

evaluation of data reduction software Linearity Photometry

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Page 23: AKARI IRC survey of the Large Magellanic Cloud

There should be more to come.

There are six refereed paper published so far using the AKARI LMC catalog.

We hope you to write papers using the AKARI/LMC Point Source Catalog.

2012/Feb/27-29 AKARI2 @ Jeju 23

Page 24: AKARI IRC survey of the Large Magellanic Cloud

Acknowledgements

Special thanks to: Dr. Fumihiko Usui

He kindly helped us a lot to make our observations effectively and smoothly.

2012/Feb/27-29 AKARI2 @ Jeju 24

Page 25: AKARI IRC survey of the Large Magellanic Cloud

Appendix

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Page 26: AKARI IRC survey of the Large Magellanic Cloud

LMC phase-3 observation Observe almost the

same region as in phase1&2 Bar region ×

too crowded Total 515 pointing ΔΦ = π

Photometry & Spectroscopy N3, NP

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Green: April –   May 2008Blue: May – July 2008Red: October 2008Magenta: November - January 2008

Phase1&2

phase3

Page 27: AKARI IRC survey of the Large Magellanic Cloud

SMC observationoverview

Open time program PI: Y. ITA

“Role of pulsation along the AGB”

Patchy area survey Photometry&Spectro

scopy N3,N4,S7,S11,L15,L2

4 NP,SG1,SG2

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Red: NIR,MIRS,MIRL availableCyan: NIR,MIRS availableBreen: only MIRL available

Page 28: AKARI IRC survey of the Large Magellanic Cloud

SMC spectroscopy results

Total 500 arcmin^2 NP, SG1, SG2

spectroscopy Detected many

point-like sources with PAH features

Upper panel DSS image with equatorial

coordinate grid Lower panel

IRAS 100um image with galactic coordinate grid

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Page 29: AKARI IRC survey of the Large Magellanic Cloud

SMC 0059-7230H

blue:N3 green:S7 red: S11

2012/Feb/27-29 AKARI2 @ Jeju 29

A

D

B

CE

A

B

C

D

E

Page 30: AKARI IRC survey of the Large Magellanic Cloud

SMC 0050-7250H

blue:N3 green:S7 red: S11

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A

B

C

D

A

B

C

D

Page 31: AKARI IRC survey of the Large Magellanic Cloud

SMC 0055-7250D

blue:N3 green:S9W red: L15

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A

BC

D

A

B

C

D

E

E F

F

Page 32: AKARI IRC survey of the Large Magellanic Cloud

SMC 0050-7310E

blue:N3 green:S11 red: L15

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A

B

C

D

A

B

C

D

Page 33: AKARI IRC survey of the Large Magellanic Cloud

SMC 0055-7230D

blue:K green:N3 red: S9W

2012/Feb/27-29 AKARI2 @ Jeju 33

AB

C

D

A

B

C

D