J/A+A/674/A17 Gaia Data Release 3. The Cepheids sample (Ripepi+, 2023)
Gaia Data Release 3: Specific processing and validation of all sky RR Lyrae and
Cepheid stars: The Cepheid sample.
Ripepi V., Clementini G., Molinaro R., Leccia S., Plachy E., Molnar L.,
Rimoldini L., Musella I., Marconi M., Garofalo A., Audard M., Holl B.,
Evans D.W., Jevardat de Fombelle G., Lecoeur-Taibi I., Marchal O.,
Mowlavi N., Muraveva T., Nienartowicz K., Sartoretti P., Szabados L.,
Eyer L.
<Astron. Astrophys. 674, A17 (2023)>
=2023A&A...674A..17R 2023A&A...674A..17R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Optical ; Milky Way ; Magellanic Clouds ;
Galaxies, nearby
Keywords: stars: distances - stars: variables: Cepheids - Magellanic Clouds -
Galaxy: disc - surveys - methods: data analysis
Abstract:
Cepheids are pulsating stars that play a crucial role in several
astrophysical contexts. Among the different types, the Classical
Cepheids are fundamental tools for the calibration of the
extragalactic distance ladder. They are also powerful stellar
population tracers in the context of Galactic studies. The Gaia Third
Data Release (DR3) publishes improved data on Cepheids collected
during the initial 34 months of operations.
We present the Gaia DR3 catalogue of Cepheids of all types, obtained
through the analysis carried out with the Specific Object Study (SOS)
Cep&RRL pipeline.
We discuss the procedures adopted to clean the Cepheid sample from
spurious objects, to validate the results, and to re-classify sources
with a wrong outcome from the SOS Cep&RRL pipeline.
The Gaia DR3 includes multi-band time-series photometry and
characterisation by the SOS Cep&RRL pipeline for a sample of 15006
Cepheids of all types. The sample includes 4663, 4616, 321 and 185
pulsators, distributed in the LMC, SMC, M31 and M33, respectively, as
well as 5221 objects in the remaining All Sky sub-region which
includes stars in the MW field/clusters and in a number of small
satellites of our Galaxy. Among this sample, 327 objects were known as
variable stars in the literature but with a different classification,
while, to the best of our knowledge, 474 stars have not been reported
before to be variable stars and therefore they likely are new Cepheids
discovered by Gaia.
Description:
The following tables include corrections to CDS table I/358/vcep.
(Gaia DR3 Part 4. Variability).
Table 5: Re-processing of the Gaia DR3 data for multi-mode Classical
Cepheids not detected as such by the Specific Object Studies (SOS)
Cep&RRL pipeline.
Table 6: Reclassification of 1160 objects incorrectly classified by
the SOS Cep&RRL pipeline.
Table 9: List of sources for which the SOS Cep&RRL pipeline provides a
metallicity estimate which should not be used as these stars are not
Classical Cepheid pulsators.
Table 10: Association of Cepheids in the All Sky sample with
open/globular clusters and with dwarf galaxies which are satellites of
the Milky Way.
Table 11: Potential contaminants of type other than Cepheids.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 75 109 Re-processing of the Gaia DR3 data for multi-mode
Classical Cepheids not detected as such by the
Specific Object Studies (SOS) Cep&RRL pipeline
table6.dat 72 1160 Reclassification of 1160 objects incorrectly
classified by the SOS Cep&RRL pipeline
table9.dat 19 142 List of sources for which the SOS Cep&RRL pipeline
provides a metallicity estimate which should not
be used as these stars are not Classical Cepheid
pulsators
table10.dat 96 105 Association of Cepheids in the All Sky sample
with open/globular clusters and with dwarf
galaxies which are satellites of the Milky Way
table11.dat 73 93 Potential contaminants of type other than Cepheids
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See also:
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
I/358 : Gaia DR3 Part 4. Variability (Gaia Collaboration, 2022)
J/A+A/674/A18 : Gaia DR3. The RR Lyrae sample (Clementini+, 2023)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia source identification (source_id)
21- 28 F8.6 d PL Longest pulsation period
30- 39 E10.2 d e_PL Uncertainty on the longest pulsation period
41- 48 F8.6 d PS Shortest pulsation period
50- 59 E10.2 d e_PS Uncertainty on the shortest pulsation period)
61- 65 F5.3 --- PS/PL Period ratio
67- 75 A9 --- Modes Modes of pulsation (1)
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Note (1): Modes of pulsation as follows:
F = fundamental
1O = first overtone
2O = second overtone
3O = third overtone
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia source identification (source_id)
21- 30 F10.6 deg RAdeg Right ascension (ICRS) at Epoch=2016.0
32- 41 F10.6 deg DEdeg Declination (ICRS) at Epoch=2016.0
43- 52 A10 --- Class Corrected classification (G1)
54- 65 A12 --- Comment Comment indicating if the correction in on the
Cepheid class or its pulsation mode
67- 72 A6 --- Region Region of the sky there the target lies (2)
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Note (2): The All Sky sample refers to the remaining sky after excluding the
regions around Large and Small Magellanic Clouds, as well as around M31
and M33 galaxies.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- GaiaDR3 Gaia source identification (source_id)
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia source identification (source_id)
21- 30 F10.6 deg RAdeg Right ascension (ICRS) at Epoch=2016.0 (RA)
32- 41 F10.6 deg DEdeg Declination (ICRS) at Epoch=2016.0 (Dec)
43- 52 A10 --- Mode Cepheid mode or class (Mode) (G1)
54- 67 A14 --- System Galaxy or star cluster to which the Cepheid
belong (System)
69-105 A37 --- OName Additional name for the star according to
SIMBAD (Other ID)
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia source identification (source_id)
21- 29 F9.5 deg RAdeg Right ascension (ICRS) at Epoch=2016.0
31- 39 F9.5 deg DEdeg Declination (ICRS) at Epoch=2016.0
41- 48 F8.5 d PSOS Period of pulsation according to the
SOS Cep&RRL pipeline
50- 59 A10 --- ClassDR3 Classification according to Gaia DR3*
61- 64 A4 --- ClassLit Classification according to the Literature
66- 73 A8 --- r_ClassLit Literature source (2)
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Note (2): References as follows:
CATALINA = Drake et al. (2014ApJS..213....9D 2014ApJS..213....9D, Cat. J/ApJS/213/9),
Drake et al. (2017MNRAS.469.3688D 2017MNRAS.469.3688D, Cat. J/MNRAS/469/3688),
Torrealba et al. (2015MNRAS.446.2251T 2015MNRAS.446.2251T, Cat. J/MNRAS/446/2251)
OGLE4 = Soszynski et al. (2019AcA....69..321S 2019AcA....69..321S)
ZTF = Chen et al. (2020ApJS..249...18C 2020ApJS..249...18C)
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Global notes:
Note (G1): Cepheid mode or class as follows:
DCEP_F = Classical Cepheids pulsating in the fundamental mode
DCEP_1O = Classical Cepheids pulsating in the first overtone mode
DCEP_MULTI = Classical Cepheids pulsating in multiple modes
ACEP_F = Anomalous Cepheids pulsating in the fundamental mode
ACEP_1O = Anomalous Cepheids pulsating in the fundamental
first overtone mode
BLHER = Type II Cepheids belonging to the BL Her class
WVIR = Type II Cepheids belonging to the W Vir class
RVTAU = Type II Cepheids belonging to the RV Tau class
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Acknowledgements:
Vincenzo Ripepi, vincenzo.ripepi(at)inaf.it
(End) Patricia Vannier [CDS] 08-Sep-2022