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J/ApJ/552/289 Semiregular variable stars in Baade's windows (Alard+, 2001)
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Mass-losing semiregular variable stars in Baade's windows.
Alard C., Blommaert J.A.D.L., Cesarsky C., Epchtein N., Felli M., Fouque P.,
Ganesh S., Genzel R., Gilmore G., Glass I.S., Habing H., Omont A.,
Perault M., Price S., Robin A., Schultheis M., Simon G., Van Loon J.T.,
Alcock C., Allsman R.A., Alves D.R., Axelrod T.S., Becker A.C.,
Bennett D.P., Cook K.H., Drake A.J., Freeman K.C., Geha M., Griest K.,
Lehner M.J., Marshall S.L., Minniti D., Nelson C., Peterson B.A.,
Popowski P., Pratt M.R., Quinn P.J., Sutherland W., Tomaney A.B.,
Vandehei T., Welch D.L.
<Astrophys. J. 552, 289 (2001)>
=2001ApJ...552..289A
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ADC_Keywords: Stars, variable ; Photometry ; Mass loss ;
Effective temperatures ; Photometry, infrared
Keywords: astronomical data bases: miscellaneous - Galaxy: bulge -
infrared: stars - stars: AGB and post-AGB -
stars: fundamental parameters - stars: late-type -
stars: variables: other
Abstract:
By cross-correlating the results of two recent large-scale surveys,
the general properties of a well-defined sample of semiregular
variable stars have been determined. ISOGAL mid-infrared photometry
(7 and 15{mu}m and MACHO V and R light curves are assembled for
approximately 300 stars in the Baade's windows of low extinction
toward the Galactic bulge. These stars are mainly giants of late M
spectral type, evolving along the asymptotic giant branch (AGB). They
are found to possess a wide and continuous distribution of pulsation
periods and to obey an approximate logP-M_bol_ relation or set of
such relations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 332 Summarized photometry of sources
table2.dat 64 14 Mira variables in the survey area
table3.dat 69 26 Spectral energy distribution modeling results
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See also:
http://wwwmacho.anu.edu.au/ : The MACHO Project Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ISOGALP The full ISOGAL designation (1)
18- 20 I3 --- BW Running number during analyses of the
Sgr I and NGC6522 fields (G1)
22- 35 A14 --- MACHO The MACHO identifier (2)
37- 41 F5.2 mag Vmag Flux-weighted time-averaged V band magnitude
42 A1 --- u_Vmag [:] Indicates a by-eye estimate in Vmag (3)
44- 48 F5.2 mag Rmag Flux-weighted time-averaged R band magnitude
49 A1 --- u_Rmag [:] Indicates a by-eye estimate in Rmag (3)
51- 55 F5.2 mag Jmag ? The J_0_ band magnitude
57- 60 F4.2 mag Kmag ? The K_0_ band magnitude
62- 65 F4.2 mag 7mag Magnitude in the 7 micron band
67- 70 F4.2 mag 15mag Magnitude in the 15 micron band
72- 75 F4.2 mag Amp ? The optical pulsation amplitude
77- 81 F5.3 [d] LogP ? Log of the period
82 A1 --- u_LogP [:] Indicates a by-eye estimate in LogP
84-101 A18 --- n_ISOGALP Notes on ISOGALP (4)
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Note (1): Designation is of the form: ISOGALP Jhhmmss.s-ddmmss (J2000)
where P signifies `provisional'.
Note (2): Refers to the field, tile, and the sequence number
(see Alcock et al., 1999PASP..111.1539A).
Note (3): The MACHO light curves show saturation effects. No estimates
for Amp and LogP are given.
Note (4): BMB denotes Blanco McCarthy Blanco (1984AJ.....89..636B),
B denotes Blanco (1986AJ.....91..290B), and the following number is
the M giant spectral sub-type. Those marked with ``Mira'' are also
listed in Table 1. In some cases we note a second or ``double'' period
using the notation: dp(Amp,LogP).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 ---- Cluster Cluster name
10- 16 A7 --- TLE TLE number (Frogel & Whitford,
1987ApJ...320..199F, TLE NGC 6522 NNN in Simbad)
18- 31 A14 --- MACHO MACHO designation
32 A1 --- n_MACHO [M] M: "missing" (1)
34- 37 F4.2 mag [7]mag Average [7] magnitude
([7]=12.38-2.5logF_LW2_(mJy))
39- 42 F4.2 mag [15]mag Magnitude [15] ([[15]=10.79-2.5logF_LW3(mJy))
44- 47 F4.2 mag Kmag Average K magnitude
49- 51 I3 d Per1 ? MACHO period
52 A1 --- --- [/]
53- 55 I3 d Per2 ? Lloyd Evans (1976MNRAS.174..169L) period
56- 57 A2 --- u_Per2 Uncertainty flag on Per2
59- 64 A6 --- Com Comments (2)
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Note (1): "missing" stars probably appeared constant or nonstellar in
the MACHO data as a result of saturation and were rejected before the
matching stage.
Note (2): Mis-id: An apparent MACHO counterpart was mistakenly found
during the cross-identification process; the image of the correct
star was probably saturated.
d: Fragmentary MACHO light curve
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- BW BW number (G1)
5- 18 A14 --- MACHO MACHO designation
21- 27 A7 --- FW87 ? Frogel & Whitford (1987ApJ...320..199F)
designation (1)
29- 33 F5.2 mag Mbol Bolometric magnitude
35- 38 I4 K T(V-K) Effective temperature calculated from
dereddened (V-K)0 color and calibration of
Bessell et al. (1998, Cat. <J/A+A/333/231>)
40- 43 I4 K Tmod Best-fit input model spectrum temperature
45- 50 E6.1 --- dM/dtL4 Mass-loss rate normalised to a
luminosity of L=10^4^L_{sun}_
52- 57 E6.1 --- dM/dt True mass-loss
59- 64 F6.2 mJy EF15um Excess of 15{mu}m flux
66- 69 F4.1 km/s Vexp Expansion velocity corrected for a factor of
(L/10^4^L_{sun}_)^1/4^
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Note (1): Frogel & Whitford (1987ApJ...320..199F) designation:
NNN = BMB NNN, BNNN = [B86] NNN and TLE NNN = TLE NGC 6522 NNN in Simbad
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Global notes:
Note (G1): BW number:
From Glass et al., 1999MNRAS.308..127G,
[GGA99] NGC 6522 NNN or [GGA99] Sgr I NNN in Simbad
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History:
From electronic version of the journal
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 30-Aug-2001