J/A+A/625/A151 Galactic Bulge Type II Cepheids NIR data (Braga+, 2019)
New type II Cepheids from VVV data towards the Galactic center.
Braga V.F., Contreras Ramos R., Minniti D., Ferreira Lopes C.E.,
Catelan M., Minniti J.H., Nikzat F., Zoccali M.
<Astron. Astrophys. 625, A151 (2019)>
=2019A&A...625A.151B 2019A&A...625A.151B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, infrared ; Proper motions
Keywords: stars: variables: Cepheids - Galaxy: bulge - Galaxy: center
Abstract:
We perform parallel Lomb-Scargle and Generalized Lomb-Scargle
periodogram analysis of the Ks-band time series of the VISTA Variables
in the Via Lactea Survey, to detect periodicities. We take account of
periods, light amplitudes, distances and proper motions to provide a
classification of the candidate variables. We provide a catalog which
will be the starting point for future spectroscopic surveys in the
innermost regions of the Galaxy.
Description:
We detected 1019 periodic variable stars, of which 164 T2Cs, 210 Miras
and 3 Classical Cepheids. We also found the first Anomalous Cepheid in
this region. We present the most extensive catalog of T2Cs in the
Galactic centre region to date. Offsets in E(J-Ks) and in the
reddening law cause very large (∼1-2kpc) uncertainties on distances in
this region.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 264 1019 *Properties of the candidate PVS
table3.dat 40 78035 *Ks-band time series of our candidate variables
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Note on table2.dat and table3.dat: Note that the data of Miras - except those in
common with Matsunaga et al. (2009MNRAS.397..933M 2009MNRAS.397..933M) - are not within these
tables and will be published in Nikzat et al. (2019, in prep.)
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See also:
J/MNRAS/397/933 : LMC type II Cepheids JHKs magnitudes (Matsunaga+, 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- ID Candidate variable ID
17 A1 --- sat [*] "*" if Ks-band mean magnitude is brighter
than 11mag, which means that the source is
heavily saturated (1)
19- 43 A25 --- IDlit ID from literature, if available (2)
45- 54 F10.6 deg RAdeg ?=-99 Right ascension (J2000)
56- 65 F10.6 deg DEdeg ?=-99 Declination (J2000)
67- 71 A5 --- Type Classification of the candidate variable (3)
73- 83 F11.6 d Per ?=-99 Classification of candidate variable
85- 91 F7.3 mag Zmag ?=-99 Mean Z-band magnitude (4)
93- 99 F7.3 mag e_Zmag ?=-99 Uncertainty on mean Z-band magnitude (4)
101-107 F7.3 mag Ymag ?=-99 Mean Y-band magnitude (4)
109-115 F7.3 mag e_Ymag ?=-99 Uncertainty on mean Y-band magnitude (4)
117-123 F7.3 mag Jmag ?=-99 Mean J-band magnitude (5)
125-131 F7.3 mag e_Jmag ?=-99 Uncertainty on mean J-band magnitude (5)
133 A1 --- f_Jmag [*] "*" if the J-band magnitude was derived
with template fitting (5)
135-141 F7.3 mag Hmag ?=-99 Mean H-band magnitude (5)
143-149 F7.3 mag e_Hmag ?=-99 Uncertainty on mean H-band magnitude (5)
151 A1 --- f_Hmag [*] "*" if the H-band magnitude was derived
with template fitting (5)
153-159 F7.3 mag Ksmag ?=-99 Mean Ks-band magnitude
161-167 F7.3 mag e_Ksmag ?=-99 Uncertainty on mean Ks-band magnitude
169-175 F7.3 mag AmpKs ?=-99 Ks-band amplitude
177-183 F7.3 mag e_AmpKs ?=-99 Uncertainty on the
Ks-band amplitude
186-192 F7.2 mas/yr pmGLON ?=-99 Proper motion in galactic longitude
times the cosine of the latitude
(pmGLON*cosGLAT)
196-201 F6.2 mas/yr e_pmGLON ?=-99 Error on the proper motion in
galactic longitude times the cosine
of the latitude
204-210 F7.2 mas/yr pmGLAT ?=-99 Proper motion in galactic latitude
214-219 F6.2 mas/yr e_pmGLAT ?=-99 Error on the proper motion in
galactic latitude
223-228 F6.2 mag AKs ?=-99 Extinction in the Ks-band
232-237 F6.2 kpc Dist ?=-99 Distance
241-246 F6.2 kpc e_Dist ?=-99 Uncertainty on the distance
252-255 I4 km/s Vt ?=-99 Tangential velocity
261-264 I4 km/s e_Vt ?=-99 Uncertainty on tangential velocity
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Note (1): Mean magnitude and amplitude might be inaccurate.
Note (2): See section 5.1 of the paper for details.
Note (3): Classification of the candidate variable as follows:
0 = CCFU
1 = CCFO
2 = T2C
3 = ACFU
4 = ACFO
5 = RRab
6 = RRc
7 = SRV
8 = Mira
9 = NPV
A = DEB
A "-" sign indicates a low-rank variable, meaning that its light
curve is noisy and the classification is not certain.
Note (4): The listed ZY magnitudes are obtained from the average of the two
available phase points.
Note (5): The listed J and H magnitudes are obtained either from the average
of the two available phase points or applying the template.
In the latter case, the columns f_Jmag and f_Hmag are marked with an "*".
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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 --- ID Candidate variable ID
17- 27 F11.5 d HJD ?=0 Heliocentric Julian Date (HJD-2400000)
of the observation
29- 34 F6.3 mag Ksmag Ks magnitude of the star at given HJD
36- 40 F5.3 mag e_Ksmag Photometric error on the magnitude estimate
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Acknowledgements:
Vittorio Francesco Braga, vittorio.braga(at)roma2.infn.it
(End) Vittorio Braga [Univ. Andres Bello], Patricia Vannier [CDS] 29-Apr-2019