RX4I

2014.11.29 – 12.01 9`MV`Qc8`RX*

Metllicity Distribution

GZ>_.SLine Depth Ratio:=^\,F!JWc863
[Fe/H]



Cepeids

ClusterÚăĳ (§q)ÒďĬđtĴ¦½ÝĘĵĭčĂįu$§q%
ÂÉĲ³ē~ÍÁ$§¶ªyq%Ķtīĉ$råËÅ%
G.Bono(o"iq)L.Inno(ESO)

Our New Galactic
Center Cepheids(Matsunaga et al. 2011)

RX4I

Velocities (VLSR) of the Cepheids
• Consistent with the rotation of the Nuclear Disk.
Cepheid (b)—61 km/s Cepheid (d)—11 km/s

Bono et al. 2013
Rg[kpc]

• =^\0eT1d– ©ĈąvÀG,@G^fWYdG|Ġë– ĮČGXep_p]¿ĩ• Êöĝ¡Æ¸|ĠëG• GZ>_. JWc86327– Line Depth RatioU/=

• 10/13-17FdY`B{TS=çúsB¡Sgr A*

12 pc = 5

5 arcmin corresponds to a projecteddistance of 12 pc at 8 kpc.

Cepheid (c)—80 km/s

Matsunaga et al. 2014

2014.11.29 – 12.01 9`MV`Qc8`RX*

JWc8O-27
• Color-temperature– B-V, V=R, …

• Excitation potential– (ex)FeIGXep_p]HEPB}ę
Âü«ċzBGÊöĝGLINE DEPTH RATIO:
JWc863• Ionization balance– (ex)FeICFeIIGXep_p]2}ę

• Line-depth Ratios– +&)Y NPhotometrySpectroscopyLine Depth Ratios• VICFeIGlYpGĝF:RĀěGð Cas A(G0V) 5988K
70 Vir(G5V) 5569K

Line Depth Ratios• ĝ]["nGÃ®

– ĝFĪÓElYpGR1CÓ27/lYpû7
R2UĜ8Þ(r=R1/R2)U£R– ø!EĝGå1P&ĝvs r'GplotUÃ®:R

HR222(K2V) 5122K
61 Cyg A(K5V) 4501K

VI 6251.83A,0.29eVFeI 6252.57A,2.40eV

Gray & Johanson 1991

D/RX

Line Depth RatioC@• Gray & Johanson 1991

• Color-temperature– DwarfBVCFeGlYpGÞUA/R• Sasselov & Lester 1990

– GiantBCCSiED1Pĝ]["nUÃ®

• Gray & Livingston 1997

– CI,FeI,TiII1PíĢG1.5KGÖ• Kovtyukh+2000,2007

reddeningGÄĥ2Ô¨– B-V, R-I, …

Uáw• Excitation potentialjbn]gZcnGïþ2.R
– (ex)FeIGXep_p]HEPB}ę

– ^fWYdEDGSupergiantB30KùGėBĝ– SupergiantB·®GÖTPE/lYpBgXU·VB/R

(2007).

(log(gf)G¢¬2q3/)

• Ionization balance– (ex)FeICFeIIGXep_p]2}ę

• Line Depth Ratios– *tGlYpGû7GÞ1PÃRêĕ61
313600-7800K
5-30K

– reddeningNjbnGïþ2Ü/– ^fWYdĔGÖñ:RåBM]gZcn>51Pá
wB3R

0eT]L`[b

2014.11.29 – 12.01 9`MV`Qc8`RX*

Observed calibration star• Target– 12 calibration star
– Temperature range : 4000 – 6000 K
Object'HD21997822Âü«ċzBGÊöĝG

GZ>_.(H-BAND)
c8'H?

Sp.'Type'Teﬀ[K]'

log(g)'

K4.5Ib.

 



[Fe/H]'
HD137704 K4III.

   Arcturus*1.

K2III.

4275.

1.7.

80.47.

HD0120142.

K0Ib.

4371.

0.66.

0.04.

HD1241862

K4III.

 μLeo*1.

K2III.

4550.

2.1.

0.3.

HD2045432.

G0.

81.76.

HD2230472.

4617.

1.31.

G5Ib.

5002.

1.26.

0.04.

2G5IV+.

5582.

3.64.

80.02.

2

HD204155 .

G5.

5718.

3.93.

80.69.

HD0183912.

G0Ia.

5750.

1.2.

80.13.

G0III+.

6277.

4.01.

0.26.

HD196755 .

2HD202447 .

*1 Smith et al.2013, *2 Prugniel et al. 2011
Our New Galactic Center Cepheids(Matsunaga et al. 2011)

0eT]L`[bH

Observed calibration star• Target• Melendez+1999B– 12 calibration star
– Temperature range : 4000 – 6000 K

4eV±GlYp
H×E/

• Instrument : SUBARU/IRCS

g(g)'[Fe/H]'

  .7.

80.47.

66.

0.04.

)&)fP#)$'

– Wavelength : H-band (1.4-1.8m)– Wavelength Resolution : R=20,000

7SA/RlYp
5.5~6.5eVćQ2xè¹/ .1.

0.3.

31.

81.76.

26.

0.04.

64.

80.02.

93.

80.69.

.2.

80.13.

01.

0.26.

2~6eVÏÂFğ:R¤
FeI : ICVD26eVÏÂ
TiI : 5eVÏÂJBğ
CrI : /;SMĦ/heids&)(%)&)";A• lYpGû7Hgaussian fitBĜ• æİälYpCİälYpGÞUR• lYpGħ¼Ñ(Kovtyukh+1993)– İähap\kn2ĄS=lYp– ØlYpHB3R>5ÿÂÕGgX– İälYpH30tùGĒãFeI,SiI,MgIED– æİälYpH7tGĒãFeI, TiI, CoI, AlI• )­6CGcontinuumGïþUE4:– ºĄlYpH¿ĩFóJE/• ĝHSmith et al.2013, Prugniel et al. 2011

– B3R>5)($   &""!          #     #      #             &    $ – telluriclYp2¹/ìéH¿ĩĨĚ1PĆ«• ØlYpHMelendez+1999GHepdlYpm]c1Pħ6500

FeI(15194.50)/SiI(15376.89)

6500

Teff = b + a*r (r=ratio)a = ï1667.98
b = 5812.59

6000
5500

4500

4000

3500
0.0

0.5

1.0

1.5

3500
0.0

2.0

Lineïdepth Ratio
FeI(16225.64)/FeI(16753.09)

6500

Teff = b + a*r (r=ratio)a = ï3181.26
b = 8330.85

6500

Teff = b + a*r (r=ratio)a = ï1326.90
b = 5804.87

2014.11.29 – 12.01 9`MV`Qc8`RX*

Teff [K]

5000

5000

4500

4500

4000

4000

4000

3500
0.0

3500
0.035000.0

FeI(16225.64)/FeI(16753.09)

6000

6500

Teff = b + a*r (r=ratio)a = ï3181.26
b = 8330.85

2.0

CoI(16757.64)/FeI(16316.35)

6000

6500

Teff = b + a*r (r=ratio)a = ï2561.01
b = 5661.05

5000
4500

4500

4000

4000

3500
0.0

3500
0.00.51.0
1.5Lineïdepth Ratio

2.0

2.0

AlI(16763.35)/FeI(16517.25)
Teff = b + a*r (r=ratio)a = ï2187.96
b = 7565.60

5000
4500
4000

0.5
1.0
1.5
Lineïdepth Ratio

2.0

5000

4000

0.5
1.01.5Lineïdepth Ratio

5500

5000

Teff = b + a*r (r=ratio)a = ï1515.87
b = 5933.96

4500

6000

5500
Teff [K]5500

0.5
1.01.5Lineïdepth Ratio

Teff [K]

6500

2.0

TiI(15715.57)/FeI(15621.65)

6000
5500

4500

0.5
1.0
1.5
Lineïdepth Ratio

6500

Teff = b + a*r (r=ratio)a = ï1056.02
b = 5023.62

5500
Teff [K]5000

TiI(15602.84)/FeI(16040.65)

6000

5500
Teff [K]Teff [K]5500

Teff [K]TiI(15543.78)/FeI(15591.49)

6000

3500
0.00.51.01.5Lineïdepth Ratio

2.0

3500
0.00.51.01.5Lineïdepth Ratio

2.0

5000

4000

0.5
1.01.5Lineïdepth Ratio• ßò¬2à/Â/ĨĚGlYpBgXU·K• 3500-6000KFĎÙB3R7@GßòÌ6500

Teff
ab45004000

Teff = b + a*r (r=ratio)a = ï1667.98
b = 5812.59

CoI(16757.64)/FeI(16000

Teff [K]Teff [K]4500

FeI(15194.50)/SiI(15376.89)

1.

5500

5000

3500
0.00.5Lineïdep

5500

6000

5000
4500

4000

6000

6500

Teff
ab55005000

6500

c8'H?

TiI(15543.78)/FeI(156000

Teff [K]9¤BgXU·K• Xep_p]Gĝģā¬UE4:• ĮČ¯N­FO?A·®2 9EPÎ¤BMÛ

Teff [K]• ¡Æ¸ëFĪÓEGBÂü«ċzBGÊöĝG=^\,F!a:

2.0

3500
0.00.51.
Lineïdep

First Application toGalactic Center Cepheids

=^\,F!1V[b• ©ĈąvÀG^fWYd,åGIRCSñ
Matsunaga +2011• Target : cepheids in the Galactic Center– new discovered cepheids (Matsunaga et al. 2011)– highly reddening objects

Takeda+2013• Derived temperature of GCC-c is #4800K.
6500

Teff = b + a*r (r=ratio)a = ï1667.98
b = 5812.59

4500

4000

4000

0.186.

80.009.

23.54

GCC-b

17:45:32.27-29:02:55.2

80.105.

80.043.

19.96

GCC-c

17:45:30.89-29:03:10.5

80.112.

80.041.

22.76

GCC-d

17:44:56.90-29:13:33.7

80.324.

80.026.

18.84
Fig.20

FeI(16225.64)/FeI(16753.09)

r = R1 / R2
% $  % $  
    
# !!  * ' #     !!   *  '  #       !!   * '   #      !!   *   '    
   !!  *  ' &      !!  * ' $     !!
 *  '% $  % $  
          !! *  '     *  '     !!         !!   *  ' $ * '  #  !!

5000

CoI(16757.64)/FeI(16316.35)

6500

Teff = b + a*r (r=ratio)a = ï2561.01
b = 5661.05

4500

4000

4000

3500
0.0

3500
0.00.51.01.5
Lineïdepth Ratio

2.0Fig.21

Teff = b + a*r (r=ratio)a = ï1515.87
b = 5933.96

5000
4500
4000

0.5
1.01.5Lineïdepth Ratio

2.0

3500
0.00.51.01.5Lineïdepth Ratio

Teff = b + a*r (r=ratio)a = ï2187.96
b = 7565.60

6000

5000
4500
4000

0.5
1.0
1.5
Lineïdepth Ratio

2.0

3500
0.00.51.01.5Lineïdepth Ratio

2.0Fig.22

=^\,F!c8• Ø»G³Ėĝ(Takeda+2013)– Ċ¥1PõMPSR³Ėĝ5000K• GCC-cGĝH6@GôÐ1Páw• GCC-a,b,dGÊöĝ– +@CMı14ER»BTiNCoH0E/
– 5000K±/â÷±FER}Hreject
GCC-a

GCC-b

GCC-c

GCC-dN (scales)

2*

5*

65*

Teff [K]

6100±140

6500±200 4800 ±100 6400±170(ôBE/ÌÐMóK
• HepdBµLALine Depth RatioU/=ĝ]["nUÃ®– 3500-6000KBĎÛÇE-@GÌÐUáw– -@AU/RC100K±Gė

GCC-a,b,dG£¾»)³ĖOQMı1/ÛÇ¬~6000KGĝĤ²C}ę• ©ĈąvÀ^fWYdGĝ

GCC-cG£¾»)³ĖOQMĞ=/ÛÇ¬#4800KGĝĤ²C}ę2.0

AlI(16763.35)/FeI(16517.25)

5500

50004500

blend

35000.02.05500

E<c85K• »1PÄ0PSRĤ²C}ę:R

0.5
1.01.5Lineïdepth Ratio

6000

5500

UBc8'
• GCC-a,b,dHTiNCo20E/• æİäÈGlYpU¸ġ7<İäUî´6500

Teff = b + a*r (r=ratio)a = ï3181.26
b = 8330.85

6000

Teff [K]-28:46:55.1

3500
0.0

2.0

TiI(15715.57)/FeI(15621.65)

6000
5500

5000

4500

6500

17:46:06.01

5000

4000

0.5
1.01.5Lineïdepth Ratio

6500

Teff = b + a*r (r=ratio)a = ï1056.02
b = 5023.62

5500

4500

3500
0.0b(deg) Period(days)

GCC-a

Teff [K]5000

TiI(15602.84)/FeI(16040.65)

6000

Teff [K]RA(J2000.0) Dec(J2000.0) l(deg)

6500

Teff = b + a*r (r=ratio)a = ï1326.90
b = 5804.87

5500

Teff [K]ObjectTeff [K]5500Ċ¥1PõMPSR
³Ėĝ#5000K

TiI(15543.78)/FeI(15591.49)

6000

Teff [K]FeI(15194.50)/SiI(15376.89)

6000

Teff [K]6500– GCC-cH6@GôÐ1PáwB3100KGė– ĐHFeCAlGlYp1PĝUáw
– »1PÄ0PSRĝGĤ²CH}?A/R• Gý– ©ĈąvÀ^fWYdG|Ġëáw• ĝHline-depth ratio¡Æ¸HĊ¥1P