J/A+A/670/A19 Fifth Catalogue of Nearby Stars (CNS5) (Golovin+, 2023)
The Fifth Catalogue of Nearby Stars (CNS5).
Golovin A., Reffert S., Just A., Jordan S., Vani A., Jahreiss H.
<Astron. Astrophys., 670, A19 (2023)>
=2023A&A...670A..19G 2023A&A...670A..19G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Photometry ; Optical ; Photometry, infrared ;
Parallaxes, trigonometric ; Proper motions ; Radial velocities
Keywords: catalogs - stars: distances - Hertzsprung-Russell and C-M diagrams -
stars: luminosity function, mass function - solar neighborhood -
Galaxy: stellar content
Abstract:
We present the compilation of the Fifth Catalogue of Nearby Stars
(CNS5), based on astrometric and photometric data from Gaia EDR3 and
HIPPARCOS and supplemented with parallaxes from ground-based
astrometric surveys carried out in the infrared.
The aim of the CNS5 is to provide the most complete sample of objects
in the solar neighbourhood. For all known stars and brown dwarfs in
the 25 pc sphere around the Sun, basic astrometric and photometric
parameters are given. Furthermore, we provide the colour-magnitude
diagram (CMD) and various luminosity functions of the stellar content
in the solar neighbourhood, and characterise the completeness of the
CNS5 catalogue.
We compiled a sample of stars and brown dwarfs that are most likely
located within 25 pc of the Sun, taking space-based parallaxes from
Gaia EDR3 and HIPPARCOS as well as ground-based parallaxes from Best
et al. (2021AJ....161...42B 2021AJ....161...42B, J/AJ/161/42), Kirkpatrick et al.
(2021ApJS..253....7K 2021ApJS..253....7K, Cat. J/ApJS/253/7), and from the CNS4 into
account. We developed a set of selection criteria to clean the sample
from spurious sources. Furthermore, we show that effects of blending
in the Gaia photometry, which mainly affect the faint and red sources
in Gaia, can be mitigated to reliably place those objects in a CMD. We
also assessed the completeness of the CNS5 using a Kolmogorov-Smirnov
test and derive observational optical and mid-infrared (MIR)
luminosity functions for the main-sequence stars and white dwarfs
(WDs) in the solar neighbourhood.
The CNS5 contains 5931 objects, including 5230 stars (4946
main-sequence stars, 20 red giants and 264 white dwarfs) and 701 brown
dwarfs. We find that the CNS5 catalogue is statistically complete down
to 19.7 mag in the G-band and 11.8 mag in W1-band absolute magnitudes,
corresponding to a spectral type of L8. The stellar number density in
the solar neighbourhood is (7.99±0.11)x10-2stars/pc3, and about
72% of stars in the solar neighbourhood are M dwarfs. Furthermore, we
show that the WD sample in CNS5 is statistically complete within 25
pc. The derived number density of WDs is
(4.03±0.25)x10-3stars/pc3. The ratio between stars and brown
dwarfs within 15pc is 4.6±0.4, whereas within 25 pc it is 7.5±0.3.
Thus, we estimate that about one third of brown dwarfs are still
missing within 25pc, particularly those with spectral types later than
L8 and distances close to the 25pc limit.
Description:
The Fifth Catalogue of Nearby Stars (CNS5) aims to provide the most
volume-complete sample of stars in the solar neighbourhood. The CNS5
is compiled based on trigonometric parallaxes from Gaia EDR3 and
Hipparcos, and supplemented with astrometric data from Spitzer and
ground-based surveys carried out in the infrared. The CNS5 catalogue
is statistically complete down to 19.7mag in G-band and 11.8mag in
W1-band absolute magnitudes, corresponding to a spectral type of L8.
Continuous updates of observational data for nearby stars from all
sources were collected and evaluated. For all known stars in the 25 pc
sphere around the Sun, the best values of positions in space,
velocities, and magnitudes in different filters are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cns5.dat 761 5909 Fifth Catalogue of Nearby Stars (CNS5)
(corrected version 13-Dec-2023)
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/AJ/161/42 : Cool dwarfs volume-limited sample. I. L0-T8 dwarfs (Best+, 2021)
J/ApJS/253/7 : Brown dwarfs within 20pc full-sky census (Kirkpatrick+, 2021)
https://dc.zah.uni-heidelberg.de/cns5/q/cone/form : CNS5 Home Page
Byte-by-byte Description of file: cns5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- CNS5 [0/5930] CNS5 designation (cns5_id)
6- 11 A6 --- GJ Gliese-Jahreiss number (gj_id)
13- 16 A4 --- Comp Suffix for a component of binary or
multiple system (component_id)
18 I1 --- NComp [2/6]?=- Total number of components in the
system (n_components)
20 I1 --- P? [0/1] True for the primary of a multiple
system (primary_flag)
22- 26 A5 --- GJp Gliese-Jahriess number of the primary
component of the system (gjsystemprimary)
28- 46 I19 --- GaiaDR3 ?=- Source identifier in Gaia EDR3
(gaiaedr3id)
48- 53 I6 --- HIP ?=- Hipparcos identifier (hip_id)
55- 74 F20.16 deg RAdeg ?=- Right ascension (J2000) at Ep=Epoch (ra)
76- 98 F23.19 deg DEdeg ?=- Declination (J2000) at Ep=Epoch (dec)
100-108 F9.4 yr Epoch [1991.25/2017.97]?=- Reference epoch for
coordinates (epoch)
110-128 A19 --- r_pos Source of the position (coordinates_bibcode)
130-148 F19.15 mas plx ?=- Absolute trigonometric parallax (parallax)
150-162 F13.10 mas e_plx ?=- Error in parallax (parallax_error)
164-182 A19 --- r_plx Source of the parallax (parallax_bibcode)
184-206 F23.17 mas/yr pmRA ?=- Proper motion in right ascension
(d(RAcosDE)/dt) (pmra)
208-228 F21.18 mas/yr e_pmRA ?=- Error in pmRA (pmra_error)
230-252 F23.17 mas/yr pmDE ?=- Proper motion in declination (pmdec)
254-275 F22.18 mas/yr e_pmDE ?=- Error of pmDE (pmdec_error)
277-295 A19 --- r_pmRA Source of the proper motion (pm_bibcode)
297-319 F23.18 km/s RV ?=- Spectroscopic radial velocity (rv)
321-340 F20.17 km/s e_RV ?=- Error in RV (rv_error)
342-360 A19 --- r_RV Source of the radial velocity (rv_bibcode)
362-371 F10.7 mag Gmag ?=- G band mean magnitude (corrected) (g_mag)
373-393 E21.15 mag e_Gmag ?=- Error in Gmag (gmagerror)
395-404 F10.7 mag BPmag ?=- Gaia eDR3 integrated BP mean magnitude
(bp_mag)
406-426 E21.15 mag e_BPmag ?=- Error in BPmag (bpmagerror)
428-437 F10.7 mag RPmag ?=- Gaia eDR3 integrated RP mean magnitude
(rp_mag)
439-459 E21.15 mag e_RPmag ?=- Error in RPmag (rpmagerror)
461-480 F20.17 mag GHIPmag ?=- Hipparcos Hp magnitude converted to the
G band (gmagfrom_hip)
482-500 F19.17 mag e_GHIPmag ?=- Error in GHIPmag (gmagfromhiperror)
502-522 F21.18 mag G-RPHIP ?=- G-RP colour computed from Hipparcos
V and I (grpfrom_hip)
524-542 F19.17 mag e_G-RPHIP ?=- Error in G-RPHIP (grpfromhiperror)
544-555 F12.8 mag Gmagr ?=- Resulting (e.g., deblended) G band
magnitude (gmagresulting)
557-577 E21.15 mag e_Gmagr ?=- Error in Gmagr (gmagresulting_error)
579-599 F21.18 mag (G-RP)r ?=- Resulting (e.g., deblended) G-RP colour
(grpresulting)
601-621 E21.15 mag e_(G-RP)r ?=- Error in (G-RP)r (grpresulting_error)
623 I1 --- f_(G-RP)r [0/2]?=- Flag on (G-RP)r
(grpresulting_flag) (1)
625-631 F7.3 mag Jmag ?=- 2MASS J band magnitude (j_mag)
633-637 F5.3 mag e_Jmag ?=- Error in Jmag (jmagerror)
639-645 F7.3 mag Hmag ?=- 2MASS H band magnitude (h_mag)
647-651 F5.3 mag e_Hmag ?=- Error in Hmag (hmagerror)
653-659 F7.3 mag Ksmag ?=- 2MASS Ks band magnitude (k_mag)
661-665 F5.3 mag e_Ksmag ?=- Error in Ksmag (kmagerror)
667-685 A19 --- r_Jmag Source of NIR magnitudes (jhkmagbibcode)
687-693 F7.3 mag W1mag ?=- WISE W1 band magnitude (w1_mag)
695-699 F5.3 mag e_W1mag ?=- Error in W1mag (w1magerror)
701-707 F7.3 mag W2mag ?=- WISE W2 band magnitude (w2_mag)
709-713 F5.3 mag e_W2mag ?=- Error in W2mag (w2magerror)
715-721 F7.3 mag W3mag ?=- WISE W3 band magnitude (w3_mag)
723-727 F5.3 mag e_W3mag ?=- Error in W3mag (w3magerror)
729-735 F7.3 mag W4mag ?=- WISE W4 band magnitude (w4_mag)
737-741 F5.3 mag e_W4mag ?=- Error in W4mag (w4magerror)
743-761 A19 --- r_W1mag Source of MIR magnitudes (wisemagbibcode)
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Note (1): Flag on (G-RP)r as follows:
0 = G-RP is deblended
1 = G-RP is uncorrected vs. eDR3
2 = G-RP is converted from Hipparcos
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Acknowledgements:
Alex Golovin, agolovin(at)lsw.uni-heidelberg.de
(End) Patricia Vannier [CDS] 03-May-2023