J/MNRAS/483/5150 Variables in NGC 3109 dwarf irregular galaxy (Menzies+, 2019)
Luminous AGB variables in the dwarf irregular galaxy, NGC 3109.
Menzies J.W., Whitelock P.A., Feast M.W., Matsunaga N.
<Mon. Not. R. Astron. Soc., 483, 5150-5165 (2019)>
=2019MNRAS.483.5150M 2019MNRAS.483.5150M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, giant ; Stars, variable ;
Photometry, infrared ; Magnitudes
Keywords: stars: AGB and post-AGB - stars: variables: general -
galaxies: individual: NGC 3109 - Local Group - infrared: stars
Abstract:
In a shallow near-infrared survey of the dwarf irregular galaxy,
NGC3109, near the periphery of the Local Group, we have found eight
Mira variables, seven of which appear to be oxygen-rich (O-Miras). The
periods range from about 430d to almost 1500d. Because of our
relatively bright limiting magnitude, only 45 of the more than 400
known carbon stars were measured, but none was found to be a large
amplitude variable. One of the Miras may be an unrecognized C star.
Five of the O-Miras are probably hot-bottom burning stars considering
that they are brighter than expected from the period-luminosity
relation of Miras and that, by comparison with theoretical
evolutionary tracks, they appear to have masses ≳4M☉. A census
of very long period (P>1000d) Miras in the Galaxy and Magellanic Clouds
is presented and discussed together with the newly discovered
long-period, but relatively blue, variables in NGC3109. New JHKL
photometry is presented for three O-rich long-period Miras in the
Small Magellanic Cloud (including a candidate super-AGB star).
Description:
Our observations were made with the SIRIUS camera on the Japanese-SAAO
IRSF telescope at Sutherland. The camera produces simultaneous J, H,
and KS images covering a 7.2x7.2arcmin square field with a scale of
0.45arcsec/pixel. NGC 3109 is extended in approximately the east-west
direction and it was necessary to use three pointings to cover the
bulk of the galaxy. These were centred at α(2000.0)=10:03:06.8,
δ(2000.0)=-26:09:31.9, (field 1), and displaced by ±7.2arcmin
(fields 2 and 3, respectively) in RA. The aim of this observational
series was to find long-period variables; observations were made at 17
epochs spread over a little more than 3 yr. For each of the 3 fields,
10 dithered images were combined after flat-fielding and dark and sky
subtraction. Typical exposures were of either 20 or 30s duration,
depending on the seeing and on the brightness of the sky in the KS
band, and typically 50 or 30 exposures, respectively, were combined to
produce the final images. Photometry was performed using DOPHOT in
'fixed-position' mode, using the best-seeing H-band image as a
template. Aladin (Bonnarel et al. 2000A&AS..143...33B 2000A&AS..143...33B) was used to
correct the WCS on each template and RA and DE were determined for
each measured star. This allowed a cross-correlation to be made with
the 2MASS catalogue, and photometric zero-points were determined by
comparison of our photometry with that of 2MASS. With at least 24,
mostly foreground, stars in the range KS=11.7-14.5mag, in common in
each field, the standard errors of the zero-points in the three
filters are ±0.01mag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 9 JHKS photometry of nine large amplitude
variables
table2.dat 53 18 Very long period variables in the LMC
table3.dat 84 3 SAAO JHKL photometry of SMC variables (all
O-rich)
table4.dat 48 17 Long-period Miras in the Galaxy
tablea1.dat 74 38 JKS and Gaia (BP, RP) photometry of LPV in
LG Galaxies
tablea2.dat 74 24 JKS and Gaia (BP, RP) Photometry of supergiants
and S stars in LG Galaxies
tableb1.dat 31 11 HV11417 JHKL light curve
tableb2.dat 31 22 IRAS 00483-7347 JHKL light curve
tableb3.dat 31 15 GM103 JHKL light curve
tablec1.dat 52 16 Photometric data for variable #1060
tablec2.dat 52 16 Photometric data for variable #1067
tablec3.dat 52 16 Photometric data for variable #1112
tablec4.dat 52 16 Photometric data for variable #1153
tablec5.dat 52 16 Photometric data for variable #1224
tablec6.dat 52 17 Photometric data for variable #2075
tablec7.dat 52 17 Photometric data for variable #2081
tablec8.dat 52 16 Photometric data for variable #3064
tablec9.dat 52 16 Photometric data for variable #3089
tc10.dat 84 697 Photometric data for NGC 3109
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Name Variable name ([MWF2019] NNNN) in Simbad
6- 14 F9.5 deg RAdeg Right ascension (J2000)
16- 24 F9.5 deg DEdeg Declination (J2000)
26- 29 I4 d Period Period of the variable
31- 34 F4.2 mag DJ Peak to valley amplitude in the J-band
36- 39 F4.2 mag DH Peak to valley amplitude in the H-band
41- 44 F4.2 mag DK Peak to valley amplitude in the Ks-band
46- 51 F6.3 mag Ksmag Magnitude on the Ks-band
53- 57 F5.3 mag J-H J-H colour index
59- 63 F5.3 mag H-Ks H-Ks colour index
65- 69 F5.3 mag J-Ks J-Ks colour index
71- 74 F4.2 mag BC ? Bolometric correction
76- 80 F5.2 mag Mbol ? Bolometric magnitude
82- 83 A2 --- f_Name Flag on Name (1)
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Note (1): Flag as follows:
a = Period about the same as the length of the data train
b = Period and amplitudes after removal of linear trend
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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- 11 A11 --- Type Variable type (Carbon rich or Oxygen rich)
13- 27 A15 --- Name Variable name
29- 37 F9.6 deg RAdeg Right ascension (J2000)
39- 48 F10.6 deg DEdeg Declination (J2000)
50- 53 I4 d Period Period of the variable
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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- 15 A15 --- Name Variable name
17- 24 F8.5 deg RAdeg Right ascension (J2000)
26- 34 F9.5 deg DEdeg Declination (J2000)
36- 39 I4 d Period Period of the variable
41- 44 F4.2 mag DJ Peak to valley amplitude in the J-band
46- 49 F4.2 mag DH Peak to valley amplitude in the H-band
51- 54 F4.2 mag DK Peak to valley amplitude in the K-band
56- 59 F4.2 mag Kmag Magnitude on the K-band
61- 64 F4.2 mag J-H J-H colour index
66- 69 F4.2 mag H-K H-K colour index
71- 74 F4.2 mag J-K J-K colour index
76- 79 F4.2 mag Ksmag Ks magnitude transformed from the SAAO to the
2MASS system
81- 84 F4.2 mag J-Ks J-Ks colour index transformed from the SAAO to
the 2MASS system
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Variable name
17 A1 --- f_Name [*] Flag on Name (1)
19- 22 I4 d Period Period of the variable
24 A1 --- u_Period [:] Uncertainty flag on Period
26- 28 I3 d e_Period ? Error on Period
30- 32 A3 --- r_Period Reference for Period (2)
34- 48 A15 --- OName Other name for the variable
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Note (1): Flag as follows:
* = V829 Cas is a C star (Zuckerman & Dyck 1986ApJ...304..394Z 1986ApJ...304..394Z)
Note (2): References as follows:
1 = GCVS (Samus' et al. 2017ARep...61...80S 2017ARep...61...80S, Cat. B/gcvs)
2 = Suh & Kim (2002A&A...391..665S 2002A&A...391..665S)
3 = Riechers et al. (2005A&A...436..925R 2005A&A...436..925R)
4 = Jimenez-Esteban et al. (2006A&A...458..533J 2006A&A...458..533J, Cat. J/A+A/458/533)
5 = van Langevelde et al. (1990A&A...239..193V 1990A&A...239..193V)
6 = Orosz et al. (2017AJ....153..119O 2017AJ....153..119O)
7 = Perez-Mesa et al. (2017A&A...606A..20P 2017A&A...606A..20P) detect OH and Rb
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Byte-by-byte Description of file: tablea*
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Bytes Format Units Label Explanations
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1- 8 A8 --- Host Host galaxy
10- 24 A15 --- Name Variable name
26- 35 F10.6 deg RAdeg Right ascension (J2000)
37- 46 F10.6 deg DEdeg Declination (J2000)
48- 52 F5.2 mag Ksmag Magnitude on the Ks-band
54- 57 F4.2 mag J-Ks J-Ks colour index
59- 63 F5.2 mag RPmag Gaia DR2 RP magnitude (Gaia Collaboration,
2018A&A...616A...1G 2018A&A...616A...1G, Cat. I/345)
65- 68 F4.2 mag BP-RP Gaia DR2 BP-RP colour index (Gaia
Collaboration, 2018A&A...616A...1G 2018A&A...616A...1G,
Cat. I/345)
70- 74 F5.2 mag WRP-WK Colour index defined in Lebzelter et al.
(2018A&A...616L..13L 2018A&A...616L..13L) (1)
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Note (1): The Wesenheit functions WK and WRP are defined as:
WK=Ksmag-0.686(J-Ks) and KRP=RPmag-1.3(BP-RP)
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Byte-by-byte Description of file: tableb*
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Bytes Format Units Label Explanations
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1- 7 F7.2 d JD Julian date (JD-2440000)
9- 13 F5.2 mag Jmag ? Magnitude on the J-band (1)
15- 19 F5.2 mag Hmag ? Magnitude on the J-band (1)
21- 24 F4.2 mag Kmag Magnitude on the J-band (1)
26- 29 F4.2 mag Lmag ? Magnitude on the J-band
31 A1 --- u_Lmag [:] Uncertainty flag on Lmag (2)
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Note (1): Errors on Jmag, Hmag and Kmag are less than 0.03mag
Note (2): Errors on Lmag are less than 0.05mag except where marked with a colon
where they are less than 0.1mag
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Byte-by-byte Description of file: tablec*
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date of Observation
15- 20 F6.3 mag Jmag J magnitude on 2MASS system
22- 26 F5.3 mag e_Jmag Error on Jmag
28- 33 F6.3 mag Hmag H magnitude on 2MASS system
35- 39 F5.3 mag e_Hmag Error on Hmag
41- 46 F6.3 mag Ksmag Ks magnitude on 2MASS system
48- 52 F5.3 mag e_Ksmag Error on Ksmag
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Byte-by-byte Description of file: tc10.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right ascension (J2000)
11- 19 F9.5 deg DEdeg Declination (J2000)
21- 24 I4 --- Name Variable name ([MWF2019] NNNN) in Simbad
26- 31 F6.3 mag Jmag J magnitude on 2MASS system
33- 37 F5.3 mag e_Jmag Error on Jmag
39- 44 F6.3 mag Hmag H magnitude on 2MASS system
46- 50 F5.3 mag e_Hmag Error on Hmag
52- 57 F6.3 mag Ksmag Ks magnitude on 2MASS system
59- 63 F5.3 mag e_Ksmag Error on Ksmag
65- 69 F5.3 mag J-H J-H colour index on 2MASS system
71- 76 F6.3 mag H-Ks H-K colour index on 2MASS system
78- 82 F5.3 mag J-Ks J-Ks colour index on 2MASS system
84 A1 --- f_Name Flag on the object (1)
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Note (1): Flag as follows:
V = Variable
C = Star
G = Probable background galaxy
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 04-Aug-2022