J/A+A/619/A51 Type II Cepheids in the Galactic bulge (Braga+, 2018)
Structure and kinematics of Type II Cepheids in the Galactic bulge based
on near-infrared VVV data.
Braga V.F., Bhardwaj A., Contreras Ramos R., Minniti D., Bono G.,
de Grijs R., Minniti J.H., Rejkuba M.
<Astron. Astrophys. 619, A51 (2018)>
=2018A&A...619A..51B 2018A&A...619A..51B (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, variable ; Photometry, UBVRI ;
Photometry, infrared ; Proper motions ; Space velocities
Keywords: stars: variables: Cepheids - Galaxy: bulge - Galaxy: structure -
Galaxy: kinematics and dynamics
Abstract:
We present new Near-Infrared photometry of Type II Cepheids in the
Bulge from the VISTA Variables in the Via Lactea survey (VVV) (Minniti
et al., 2010NewA...15..433M 2010NewA...15..433M; Saito et al., 2012A&A...537A.107S 2012A&A...537A.107S, Cat.
II/337. We provide the largest sample (894 stars) of T2Cs with JHKs
observations that have accurate periods from the OGLE catalog
(Soszynski et al., 2017, Cat. J/AcA/67/297). Our analysis makes use of
the Ks-band time-series observations to estimate mean-magnitudes and
individual distances by means of the Period-Luminosity PL relation. To
constrain the kinematic properties of our targets, we complement our
analysis with proper motions based on both the VVV and Gaia Data
Release 2.
Description:
We present a catalog of 924 Type II Cepheids in the field of the
Galactic Bulge. The periods, classification and optical mean
magnitudes are from OGLE, NIR photometric properties are from VVV and
astrometric properties are from both VVV and Gaia Data Release 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 133 924 Photometric properties of target T2Cs
table2.dat 87 924 Extinction, distances, and Cartesian coordinates
of target T2Cs
table3.dat 159 924 Proper motions and velocities of target T2Cs
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See also:
II/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)
II/348 : VISTA Variable in the Via Lactea Survey DR2 (Minniti+, 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AcA/67/297 : OGLE4 Galactic center Cepheids and RR Lyrae (Soszynski+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I03 --- OGLE OGLE Identification (G1)
5- 16 I12 --- VVV ?=-9999 VVV Identification (Cat. II/337)
18- 36 I19 --- Gaia ?=-9999 Gaia Identification (Cat. I/345)
38- 42 A5 --- Type Type II Cepheid subclass
44- 53 F10.7 d Period Period of Type II Cepheid
55- 61 F7.3 mag <Vmag> ?=-99 V-band mean magnitude
64- 69 F6.3 mag <Imag> ?=-99 I-band mean magnitude
71- 77 F7.3 mag <Jmag> ?=-99 J-band mean magnitude
79- 85 F7.3 mag e_<Jmag> ?=-99 Uncertainty on the J-band mean magnitude
87- 93 F7.3 mag <Hmag> ?=-99 H-band mean magnitude
95-101 F7.3 mag e_<Hmag> ?=-99 Uncertainty on the H-band mean magnitude
103-109 F7.3 mag <Ksmag> ?=-99 Ks-band mean magnitude
111-117 F7.3 mag e_<Ksmag> ?=-99 Uncertainty on the Ks-band mean magnitude
119-125 F7.3 mag AmpKs ?=-99 Ks-band light amplitude
127-133 F7.3 mag e_AmpKs ?=-99 Uncertainty on the Ks-band light amplitude
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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- 3 I03 --- OGLE OGLE Identification (G1)
5- 10 F6.2 mag AKs(G12) ?=-99 Extinction in the Ks band according to
the map of Gonzalez et al.
(2012A&A...543A..13G 2012A&A...543A..13G) (1)
12- 17 F6.2 mag e_AKs(G12) ?=-99 Uncertainty on the extinction in the
Ks band according to the map of Gonzalez et
al. (2012A&A...543A..13G 2012A&A...543A..13G) (1)
19- 24 F6.2 mag AKs(S14) ?=-99 Extinction in the Ks band according to
the map of Schultheis et al.
(2014AJ....148...24S 2014AJ....148...24S)
26- 31 F6.2 mag e_AKs(S14) ?=-99 Uncertainty on the extinction in the Ks
band according to the map of
Schultheis et al. (2014AJ....148...24S 2014AJ....148...24S)
33- 38 F6.2 kpc xGAL ?=-99 Galactic Cartesian coordinate on the
x axis (2)
40- 45 F6.2 kpc e_xGAL ?=-99 Uncertainty on the Galactic Cartesian
coordinate on the x axis (2)
47- 52 F6.2 kpc yGAL ?=-99 Galactic Cartesian coordinate on the
y axis (2)
54- 59 F6.2 kpc e_yGAL ?=-99 Uncertainty on the Galactic Cartesian
coordinate on the y axis (2)
61- 66 F6.2 kpc zGAL ?=-99 Galactic Cartesian coordinate on the
z axis (2)
68- 73 F6.2 kpc e_zGAL ?=-99 Uncertainty on the Galactic Cartesian
coordinate on the z axis (2)
75- 80 F6.2 kpc Dist ?=-99 Distance from the Sun
82- 87 F6.2 kpc e_Dist ?=-99 Uncertainty on the Distance from the Sun
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Note (1): For some coordinates, the Gonzalez et al. (2012A&A...543A..13G 2012A&A...543A..13G) map
does not provide error on E(J-Ks), therefore there is no error on AKs(G12).
Note (2): See Section 4.3 of the paper for the description of the
xyz coordinate system.
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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 I03 --- OGLE OGLE Identification (G1)
5- 12 F8.2 mas/yr pml*V ?=-9999 VIRAC Proper motion in the l
direction times cos(b)
14- 21 F8.2 mas/yr e_pml*V ?=-9999 Uncertainty on the VIRAC Proper motion
in the l direction times cos(b)
23- 30 F8.2 mas/yr pmbV ?=-9999 VIRAC Proper motion in the b direction
32- 39 F8.2 mas/yr e_pmbV ?=-9999 Uncertainty on the VIRAC Proper motion
in the b direction
41- 48 F8.2 mas/yr pml*P ?=-9999 PSF Proper motion in the l direction
times cos(b)
50- 57 F8.2 mas/yr e_pml*P ?=-9999 Uncertainty on the PSF Proper motion
in the l direction times cos(b)
59- 66 F8.2 mas/yr pmbP ?=-9999 PSF Proper motion in the b direction
68- 75 F8.2 mas/yr e_pmbP ?=-9999 Uncertainty on the PSF Proper motion
in the b direction
77- 84 F8.2 mas/yr pml*G ?=-9999 Gaia Proper motion in the l direction
times cos(b)
86- 93 F8.2 mas/yr e_pml*G ?=-9999 Uncertainty on the Gaia Proper motion
in the l direction times cos(b)
95-102 F8.2 mas/yr pmbG ?=-9999 Gaia Proper motion in the b direction
104-111 F8.2 mas/yr e_pmbG ?=-9999 Uncertainty on the Gaia Proper motion
in the b direction
113-119 F7.1 km/s Vl* ?=-9999 Velocity in the l direction
times cos(b) from Gaia
121-127 F7.1 km/s e_Vl* ?=-9999 Uncertainty on the velocity in the
l direction times cos(b) from Gaia
129-135 F7.1 km/s Vb* ?=-9999 Velocity in the b direction from Gaia
137-143 F7.1 km/s e_Vb* ?=-9999 Uncertainty on the velocity in the
b direction from Gaia
145-151 F7.1 km/s Vt* ?=-9999 Transverse velocity from Gaia
153-159 F7.1 km/s e_Vt* ?=-9999 Uncertainty on the transverse velocity
from Gaia
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Global notes:
Note (G1): The full name is OGLE-BLG-T2CEP-NNN (OGLE BLG-T2CEP-NNN in Simbad).
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Acknowledgements:
Vittorio Francesco Braga, lordzaamus(at)gmail.com
(End) V.F. Braga [Universidad Andres Bello], P. Vannier [CDS] 05-Sep-2018