2010MNRAS.406...86M

Query : 2010MNRAS.406...86M

2010MNRAS.406...86M - Mon. Not. R. Astron. Soc., 406, 86-94 (2010/July-3)

Asymptotic giant branch stars in the Leo I dwarf spheroidal galaxy.

MENZIES J.W., WHITELOCK P.A., FEAST M.W. and MATSUNAGA N.

Abstract (from CDS):

26 asymptotic giant branch (AGB) variables are identified in the Local Group galaxy Leo I. These include seven Mira and five semiregular variables for which periods, amplitudes and mean magnitudes are determined. The large range of periods for the Miras, 158 < P < 523d, suggests an AGB spanning a significant age range. The youngest must be around 1.6Gyr while the oldest could be 10Gyr or more. Two of these old Miras are found in the outer regions of Leo I (over 490arcsec from the centre) where stars on the extended AGB are rare. They could provide an interesting test of third dredge-up and mass-loss in old stars with low metallicity, and are worth further detailed investigation. At least two stars, one a Mira and the other an irregular variable, are undergoing obscuration events due to dust ejection.

An application of the Mira period-luminosity relation to these stars yields a distance modulus for Leo I of (m - M)0= 21.80±0.11mag (internal),±0.12 (total) (on a scale that puts the Large Magellanic Cloud at 18.39mag) in good agreement with other determinations.


Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: AGB and post-AGB - stars: variables: general - galaxies: dwarf - galaxies: individual: Leo I - Local Group - galaxies: stellar content

Nomenclature: Tables 1-3: [MWF2010] LNNNN N=62+12+14 among (Nos 1010-9047).

Simbad objects: 94

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Number of rows : 94
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
3 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
5 2MASS J10080111+1213144 Mi* 10 08 01.09 +12 13 14.7           ~ 2 0
6 [MWF2010] L6010 AB? 10 08 02.7 +12 17 56           ~ 1 0
7 2MASS J10080593+1215228 LP* 10 08 05.9090269968 +12 15 22.549109904   20.73 19.34 18.25 17.65 ~ 3 0
8 2MASS J10080798+1215180 LP* 10 08 08.0065407408 +12 15 17.926749252   21.12 19.20 18.36 17.58 ~ 4 0
9 [MOW2008] 167 RG* 10 08 10.7462261592 +12 17 23.939357676   20.95 19.162   17.624 ~ 5 0
10 2MASS J10081092+1212403 AB? 10 08 10.9149943056 +12 12 40.419376740   20.50 19.09     ~ 2 0
11 [DB2002] Leo I C04 C* 10 08 11.7008776848 +12 18 33.494271624   23.27 20.04     ~ 3 0
12 [DB2002] Leo I C11 C* 10 08 12.8802052008 +12 19 37.899104376   22.72 19.99     ~ 3 0
13 [MOW2008] 104 LP* 10 08 14.5681842456 +12 18 01.718119764   20.93 19.23 18.10 17.51 ~ 4 0
14 [MWF2010] L7012 AB? 10 08 14.9 +12 14 04           ~ 1 0
15 [MWF2010] L1069 AB? 10 08 15.7 +12 18 14           ~ 1 0
16 [MWF2010] L6022 AB? 10 08 15.7 +12 18 14           ~ 1 0
17 [MWF2010] L6026 AB? 10 08 15.8 +12 20 32           ~ 1 0
18 [MOW2008] 124 RG* 10 08 15.8430362928 +12 20 32.353960020   20.87 19.182   17.510 ~ 5 0
19 ALW Leo I 19 C* 10 08 16.5854970048 +12 20 07.005920928   21.13 19.30   17.75 ~ 6 0
20 2MASS J10081708+1218148 AB? 10 08 17.0654639424 +12 18 14.718045024   21.16 19.348   17.702 ~ 6 0
21 2MASS J10081712+1218522 AB? 10 08 17.1411208104 +12 18 51.924566592   20.71 19.043   17.535 ~ 5 0
22 2MASS J10081756+1216147 RG* 10 08 17.5595209944 +12 16 15.485237652   21.16 19.420   17.855 ~ 6 0
23 2MASS J10081808+1220089 AB? 10 08 18.0734915376 +12 20 09.188898828   21.52 19.32     ~ 2 0
24 ALW Leo I 1 C* 10 08 19.49 +12 17 07.1   21.48 19.44   17.72 ~ 8 0
25 ALW Leo I 2 C* 10 08 19.9586300496 +12 17 41.373870036   21.69 19.08   17.24 ~ 9 0
26 [DB2002] Leo I C02 C* 10 08 20.0776368624 +12 20 02.402894508           ~ 3 0
27 2MASS J10082025+1217577 AB? 10 08 20.25 +12 17 57.8   19.89 18.13     ~ 2 0
28 2MASS J10082050+1217451 RG* 10 08 20.4840610584 +12 17 44.773389564   21.25 19.529   18.006 ~ 6 0
29 [DB2002] Leo I C03 C* 10 08 20.6414492688 +12 18 36.460591092           ~ 3 0
30 [MOW2008] 161 LP* 10 08 21.3615036840 +12 14 42.698482080   21.26 19.13 18.11 17.43 ~ 4 0
31 2MASS J10082141+1213485 AB? 10 08 21.3929895240 +12 13 48.493618788   21.27 19.37   17.69 ~ 4 0
32 2MASS J10082170+1218575 V* 10 08 21.701 +12 18 57.55           ~ 1 0
33 ALW Leo I 3 C* 10 08 21.7523476008 +12 17 24.909580320   21.75 19.63 18.32 17.46 ~ 7 0
34 2MASS J10082200+1218489 AB? 10 08 22.00 +12 18 48.9   20.67 18.96     ~ 2 0
35 [MOV98] 9 RG* 10 08 22.0277978544 +12 19 37.397968428   20.93 19.226   17.636 ~ 6 0
36 2MASS J10082225+1217571 Mi* 10 08 22.25088 +12 17 57.1452           ~ 5 0
37 ALW Leo I 5 C* 10 08 22.5435894432 +12 18 25.833084300   21.40 19.22     ~ 8 0
38 [DB2002] Leo I C13 C* 10 08 22.6772317416 +12 23 15.836151300           ~ 3 0
39 2MASS J10082327+1218382 AB? 10 08 23.26 +12 18 38.1   20.77 19.078   17.534 ~ 6 0
40 ALW Leo I 4 C* 10 08 23.8727184792 +12 14 16.486062216   22.60 19.85     ~ 5 0
41 [HGR2010] 10505 RG* 10 08 23.93 +12 17 08.3   20.83 19.147   17.485 ~ 7 0
42 2MASS J10082452+1220401 AB? 10 08 24.5185912752 +12 20 40.029640224   20.80 19.18   17.56 ~ 3 0
43 [MWF2010] L4012 AB? 10 08 24.7 +12 23 23           ~ 1 0
44 ALW Leo I 7 C* 10 08 24.8102418024 +12 19 26.859558792   20.882 19.059   17.111 ~ 10 1
45 ALW Leo I 8 C* 10 08 25.2836867664 +12 18 30.103971588   20.63 19.39     ~ 7 0
46 [DB2002] Leo I C10 C* 10 08 25.6143990552 +12 18 57.049628760           ~ 3 0
47 ALW Leo I 6 C* 10 08 26.3460991704 +12 14 02.594882868   21.82 19.55 18.40 17.46 ~ 5 0
48 2MASS J10082730+1218571 AB* 10 08 27.2973630192 +12 18 57.238613460           ~ 4 0
49 ALW Leo I 9 C* 10 08 27.5085900048 +12 16 53.857027128   21.67 19.47 19.25 17.75 ~ 9 0
50 ALW Leo I 10 C* 10 08 27.6746726184 +12 17 31.734218940   21.43 19.45   17.73 ~ 8 0
51 [MOW2008] 6 LP* 10 08 27.95 +12 17 56.5   20.90 19.69 18.87 18.19 ~ 3 0
52 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
53 2MASS J10082821+1223300 AB? 10 08 28.2128765808 +12 23 30.103841688   21.61 19.52     ~ 2 0
54 [MWF2010] L1097 AB? 10 08 28.3 +12 20 29           ~ 1 0
55 [MOV98] 12 RG* 10 08 28.4352827376 +12 18 48.929904108   20.56 19.097   17.698 ~ 7 0
56 ALW Leo I 11 C* 10 08 28.4920342560 +12 19 48.603348984   21.02 19.58 18.48 17.60 ~ 7 0
57 [MOV98] 27 RG* 10 08 28.7128524000 +12 16 25.387197708   20.98 19.321   17.638 ~ 6 0
58 2MASS J10082925+1218317 AB? 10 08 29.25 +12 18 31.9   20.69 19.09   17.51 ~ 3 0
59 2MASS J10082927+1218516 Mi* 10 08 29.27952 +12 18 51.6312           ~ 6 0
60 ALW Leo I 13 C* 10 08 29.5219892808 +12 20 42.975083976   21.22 19.39     ~ 5 0
61 [MOW2008] 85 AB? 10 08 30.02 +12 16 04.0     19.70   18.24 ~ 3 0
62 ALW Leo I 14 C* 10 08 31.0275613896 +12 17 07.582107192   20.72 18.80 17.84 17.03 ~ 8 0
63 [MWF2010] L4011 AB? 10 08 31.3 +12 22 48           ~ 1 0
64 [MOW2008] 25 RG* 10 08 31.5680854896 +12 18 54.262944072   20.62 19.082   17.656 ~ 5 0
65 [DB2002] Leo I C07 C* 10 08 32.34 +12 18 46.2           ~ 4 0
66 [MOV98] 17 RG* 10 08 32.61 +12 18 05.9   20.73 19.081   17.633 ~ 6 0
67 2MASS J10083364+1220109 AB? 10 08 33.6239772360 +12 20 10.939827156   20.91 19.44     ~ 2 0
68 [MOV98] 33 RG* 10 08 33.6629509608 +12 15 40.780400328   21.10 19.231   17.580 ~ 6 0
69 2MASS J10083366+1215335 AB? 10 08 33.6778794192 +12 15 33.399563040   21.41 19.64     ~ 2 0
70 2MASS J10083449+1215555 AB? 10 08 34.49 +12 15 55.6   20.99 19.35   17.77 ~ 3 0
71 ALW Leo I 15 C* 10 08 34.7089035504 +12 18 37.507957668   21.08 19.18 18.14 17.20 ~ 8 0
72 [MOV98] 8 RG* 10 08 34.9327718040 +12 19 38.830755684   20.85 19.260   17.682 ~ 6 0
73 ALW Leo I 16 C* 10 08 34.9970122104 +12 21 03.131121852   21.14 19.15   17.38 ~ 7 0
74 ALW Leo I 18 C* 10 08 35.2818066048 +12 17 24.369628956   21.50 19.39   17.67 ~ 8 0
75 2MASS J10083690+1220113 RG* 10 08 36.9050468592 +12 20 11.242778928   20.70 19.062 18.35 17.479 ~ 7 0
76 2MASS J10083714+1219244 AB? 10 08 37.1510563656 +12 19 24.125086380   20.56 19.28   17.82 ~ 3 0
77 [MOW2008] 145 AB? 10 08 38.04 +12 15 52.2     19.50   18.05 ~ 2 0
78 [MOW2008] 157 RG* 10 08 38.3653223616 +12 15 44.520689916   21.12 19.288   17.682 ~ 5 0
79 2MASS J10083901+1218320 AB? 10 08 39.0210751656 +12 18 32.084025300   21.10 19.44     ~ 2 0
80 [DB2002] Leo I C08 C* 10 08 39.8781198912 +12 22 14.534225508   22.34 19.83 18.22 17.35 ~ 4 0
81 [MOW2008] 128 AB* 10 08 41.2006870104 +12 18 07.009005312     18.73   18.23 ~ 5 0
82 2MASS J10084182+1220468 AB? 10 08 41.83 +12 20 46.9   20.28 18.72     ~ 2 0
83 [MOW2008] 153 AB? 10 08 42.15 +12 19 32.7     19.34   17.87 ~ 2 0
84 [MOW2008] 289 AB? 10 08 42.90 +12 23 45.6     19.68   18.17 ~ 2 0
85 [MWF2010] L3017 AB? 10 08 44.2 +12 23 46           ~ 1 0
86 [MOW2008] 179 RG* 10 08 44.5803949800 +12 17 22.666537572   20.96 19.332   17.763 ~ 5 0
87 2MASS J10084533+1216327 AB? 10 08 45.3263047632 +12 16 32.432135268   20.18 18.65     ~ 2 0
88 [MOW2008] 279 RG* 10 08 46.0816341312 +12 22 33.338692740     19.565   18.052 ~ 4 0
89 2MASS J10084835+1219419 RG* 10 08 48.3642741624 +12 19 41.923161516   21.00 19.51   18.03 ~ 4 0
90 [MOW2008] 324 RG* 10 08 55.5088133784 +12 14 01.477071672   21.06 19.452 18.82 17.950 ~ 5 0
91 [MFT2002] E Mi* 10 09 00.35976 +12 19 00.2316           ~ 5 0
92 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
93 WOS 48 C* 15 23 05.0730770544 -51 25 58.762691652   17.85 16.66 14.51 10.18 C 150 1
94 NAME Local Group GrG ~ ~           ~ 9325 0

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