AKARI IRC survey of the Large Magellanic Cloud

AKARI IRC survey of the Large Magellanic Cloud Yoshifusa Ita, Daisuke Kato, Takashi Onaka, & AKARI LMC team 2012/Feb/27 -29 AKARI 2 @ Jeju 1

Index l Part 1 l l Part 2 l l A brief summary of the AKARI IRC LMC survey A brief description of the AKARI LMC point source catalog Part 3 l A brief introduction of published results using the early survey data 2012/Feb/27 -29 AKARI 2 @ Jeju 2

Part 1: A brief summary of the AKARI IRC LMC survey 2012/Feb/27 -29 AKARI 2 @ Jeju 3

The AKARI IRC LMC survey PI. Prof. Onaka Takashi l Observation l l ~600 pointings 2006/Feb - 2007/July About 10 degree^2 Photometry l l Observed area 3. 2, 7, 11, 15, 24 um Spectroscopy l l NP (2. 5 - 5. 0 um) λ/Δλ ~ 20 2012/Feb/27 -29 = 10’ x 10‘ AKARI 2 @ Jeju 4

Comparison to the other surveys l Orange l l Pink l l Spitzer SAGE survey ~ 7 deg x 7 deg Cyan l 2012/Feb/27 -29 South Africa IRSF/SIRIUS JHK survey ~ 6. 3 deg x 6. 3 deg Green l l AKARI survey ~10 deg^2 AKARI 2 @ Jeju Zaritsky Optical (UBVI) survey ~ 8. 5 x 7. 5 deg 5

Comparison to the SAGE survey: λ and spectroscopy l AKARI SAGE/Spitzer l l An o-rich AGB star A c-rich AGB star 2012/Feb/27 -29 AKARI 2 @ Jeju 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. 6

5 sigma detection limits IRC+10216: an extreme c-rich AGB star β And: a tip of the RGB star AB Aur : a Herbig Ae/Be star 2012/Feb/27 -29 AKARI 2 @ Jeju 7

2. 5 -5 um spectra for sources in the observed 10 deg^2 field. Refer to Shimonishi’s Talk for initial results using the spectroscopic data FOV = 10’ x 10’ 2012/Feb/27 -29 AKARI 2 @ Jeju 8

Summary of the survey l A 10 deg^2 area was observed with AKARI l Imaging data l l l Spectroscopic data l l 3. 2, 7. 0, 11, 15, 24 um detection limits are comparable to those of the SAGE survey 2. 5 – 5. 0 um, λ/Δλ ~ 20 Unique to AKARI The point source catalog is coming soon. (Kato, Ita, and Onaka et al. ) 2012/Feb/27 -29 AKARI 2 @ Jeju 9

Part 2: A brief description of the AKARI IRC LMC point source catalog 2012/Feb/27 -29 AKARI 2 @ Jeju 10

Catalog compilation (1) Image data reduction l The latest IRC imaging data reduction toolkit ver. 20110304 was used. l Ask Egusa-san for details.

Catalog compilation (2) Source detection and photometry l Source detection l l IRAF/DAOFIND Photometry l l IRAF/DAOPHOT PSF fitting photometry l l l N 3: satellite jitter → PSF vary in each image S 7~L 24: insensitive to the jitter → grand PSF Calibration l ADU to Jy conversion factors (Tanabe et al. 2008)

Catalog compilation (3) Detection limits and Completeness l l Detection Limits (10σ, vega-mag) band N 3 S 7 S 11 L 15 L 24 mag 16. 8 13. 4 11. 5 9. 9 8. 5 Completeness Limits (90% recovery limit) l Add artificial sources to images l Dense, Medium, Blank region (source number density) Source extraction l Count the recovery rate Comparable to the 10σ detection limits except N 3, which is about 2 mag shallower. l

an example : N 3 magnitude vs. error 2012/Feb/27 -29 AKARI 2 @ Jeju 14

Catalog compilation (4) Astrometric Calibration l Referenced to l 2 MASS catalog positions l l with a condition that at least 5 sources should be mached. If matching with 2 MASS positions failed l l Alternative reference : Spitzer SAGE catalog In some cases, matching with SAGE catalog failed due to small number of sources in the FOV § l S 11 : 1 images, L 15 : 5 images, L 24 : 74 images Internal Positional Accuracy l l 0. 6” at N 3, 0. 3” at S 7, and S 11, 1. 0” at L 15 and L 24

Catalog compilation (5) Flagging l Artifact Identification l mux-bleed, column pulldown, and ghosts l l l Multi-detected sources l l any sources within ± 5 pixel belt area are flagged ghosts (inc. suspected ones) are flagged Only the best S/N data is adopted Final Products l Archive l lists all detected sources § l more fainter sources, but with false detections Catalog l only lists sources with SAGE counterparts § more reliable

Figures from Kato’s paper Two-Color diagram 2012/Feb/27 -29 pink: YSO candidates cyan: background galaxy Gruendl & Chi(2009) AKARI 2 @ Jeju blue: Naked stars orange: dusty O-rich stars green: dusty C-rich stars 17 red: YSOs

Figures from Kato’s paper Color-Magnitude diagram pink: YSO candidates cyan: background galaxy Gruendl & Chi(2009) 2012/Feb/27 -29 AKARI 2 @ Jeju 18

Summary of the point source catalog l Two types of point source catalogs. l Archive l l Catalog l l l include all detected sources only include sources with SAGE counterparts The point source catalog will be in public right after the acceptance of paper. (submitted to Ap. J soon) We want to release imaging data as well. l an GUI I/F to search images is needed.

Part 3: A brief introduction of published results using the survey data 2012/Feb/27 -29 AKARI 2 @ Jeju 20

Refereed Papers using AKARI/LMC data published so far. l Mori, Tamami I. et al. , 2012, Ap. J, 744, 68 l l Ngeow, Chow-Choong et al. , 2010, MNRAS, 408, 983 l l Supernova Remnants in the AKARI IRC Survey of the Large Magellanic Cloud Shimonishi, T. , et al. , 2008, Ap. J, 686, 99 l l 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 l l Cepheid period-luminosity relation from the AKARI observations Shimonishi, T. et al. , 2010, A&A, 514, 12 l l Observations of the near- to Mid-infrared Unidentified Emission Bands in the Interstellar Medium of the Large Magellanic Cloud AKARI Near-Infrared Spectroscopy: Detection of H 2 O and CO 2 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 2012/Feb/27 -29 AKARI 2 @ Jeju l 21

Ngeow, Chow-Choong et al. , 2010, MNRAS, 408, 983 l l Matched catalog with known Cepheid variables in the LMC. P-L relation is derived. l important results to the evaluation of data reduction software l l 2012/Feb/27 -29 AKARI 2 @ Jeju Linearity Photometry 22

There should be more to come. l l 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 AKARI 2 @ Jeju 23

Acknowledgements l Special thanks to: l Dr. Fumihiko Usui l 2012/Feb/27 -29 He kindly helped us a lot to make our observations effectively and smoothly. AKARI 2 @ Jeju 24

Appendix 2012/Feb/27 -29 AKARI 2 @ Jeju 25

LMC phase-3 observation l Observe almost the same region as in phase 1&2 l Bar region × l l Total 515 pointing ΔΦ = π Photometry & Spectroscopy l phase 3 too crowded Phase 1&2 N 3, NP 2012/Feb/27 -29 AKARI 2 @ Jeju Green: April – May 2008 Blue: May – July 2008 Red: October 2008 Magenta: November - January 2008 26

SMC observation overview l Open time program l PI: Y. ITA l l l Red: NIR, MIRS, MIRL available Cyan: NIR, MIRS available Breen: only MIRL available “Role of pulsation along the AGB” Patchy area survey Photometry&Spectro scopy l l N 3, N 4, S 7, S 11, L 15, L 24 NP, SG 1, SG 2 2012/Feb/27 -29 AKARI 2 @ Jeju 27

SMC spectroscopy results l Total 500 arcmin^2 l l NP, SG 1, SG 2 spectroscopy Detected many point -like sources with PAH features Upper panel l DSS image with equatorial coordinate grid Lower panel l IRAS 100 um image with galactic coordinate grid 2012/Feb/27 -29 AKARI 2 @ Jeju 28

SMC 0059 -7230 H A blue: N 3 green: S 7 red: S 11 B D A D C C E E B 2012/Feb/27 -29 AKARI 2 @ Jeju 29

SMC 0050 -7250 H blue: N 3 green: S 7 red: S 11 A C D C B B A D 2012/Feb/27 -29 AKARI 2 @ Jeju 30

SMC 0055 -7250 D blue: N 3 green: S 9 W red: L 15 A D A F E B D B E C C 2012/Feb/27 -29 AKARI 2 @ Jeju F 31

SMC 0050 -7310 E blue: N 3 green: S 11 red: L 15 C A A C D D B B 2012/Feb/27 -29 AKARI 2 @ Jeju 32

SMC 0055 -7230 D blue: K green: N 3 red: S 9 W B A A D C C B D 2012/Feb/27 -29 AKARI 2 @ Jeju 33