J/A+A/698/A155 The local group symbiotic star population (Laversveiler+, 2025)
The local group symbiotic star population and its tenuous link with
type Ia supernovae.
Laversveiler M., Goncalves D. R., Rocha-Pinto H. J., Merc J.
<Astron. Astrophys. 698, A155 (2025)>
=2025A&A...698A.155L 2025A&A...698A.155L (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Binaries, spectroscopic ; Supernovae ;
Radial velocities ; Optical
Keywords: binaries: general - binaries: symbiotic - supernovae: general
Abstract:
Binary stars are gravitationally bound stellar systems where the
evolution of each component can significantly influence the evolution
of its companion and the system as a whole. In certain cases, the
evolution of these systems can lead to the formation of a red
giant-white dwarf system, which may exhibit symbiotic characteristics.
The primary goal of this work is to contribute in a statistical way to
the estimation of the symbiotic system (SySt) population in the Milky
Way and in the dwarf galaxies of the Local Group (LG). Additionally,
we aim to infer the maximum contribution of SySt to Type Ia supernova
(SN Ia) events.
Given the significant discrepancies in previous estimates, we propose
two distinct approaches to constrain the expected SySt population: one
empirical and another theoretical. These approaches are designed to
provide a robust estimation of the SySt population.
For the Milky Way, we utilized position and velocity data of known
SySts to determine their distribution. Based on these properties, we
constrained the lower limit for the Galactic SySt population in the
range of 800-4100. Our theoretical approach, which relies on the
properties of zero-age main-sequence binaries and known binary
evolutionary paths, suggests a SySt population of (53±6)x103SySt
in the Galaxy. The statistical SySt populations for LG dwarf galaxies
are one to four orders of magnitude lower, primarily dependent on the
galaxies' bolometric luminosity and, to a lesser extent, their binary
fraction and metallicity. In this work, the contribution of the
single-degenerate channel of SNe Ia from symbiotic progenitors is
estimated to be of the order of 1% for the Galaxy.
Description:
Assembled and derived quantities for confirmed galactic symbiotic stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 204 132 SySt assembled data
table2.dat 77 132 SySt derived velocities and classification
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See also:
I/352 : Distances to 1.47 billion stars in Gaia EDR3
(Bailer-Jones+, 2021)
J/ApJS/240/21 : Symbiotic stars with 2MASS, WISE + Gaia data (Akras+, 2019)
http://astronomy.science.upjs.sk/symbiotics/ :
New Online Database of Symbiotic Variable Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID Identifier (sequential number)
5- 32 A28 --- Name SySt catalog name
34- 42 F9.5 deg RAdeg Right ascension (J2000)
44- 52 F9.5 deg DEdeg Declination (J2000)
54- 65 F12.6 pc Dist Distance
67- 87 F21.16 pc e_Dist Distance error
89-108 F20.16 mas/yr pmRA Proper motion in right ascension
110-120 F11.9 mas/yr e_pmRA Error in right ascension proper motion
122-141 F20.16 mas/yr pmDE Proper motion in declination
143-154 F12.10 mas/yr e_pmDE Error in declination proper motion
156-162 F7.2 km/s RV Measured radial velocity
164-181 F18.15 km/s e_RV Error in measured radial velocity
183-201 A19 --- r_RV Radial velocity reference
203-204 A2 --- IRtype [S D'] Assigned SySt IR type (1)
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Note (1): Assigned SySt IR type as follows:
S = stars with cool stellar continuum, a near-IR color temperature of
∼3000-4000K, which is attributed to the temperature of a K, M, or G
spectral-type giant
D' = stars with a near-IR color temperature around 700-1000K, indicating a
warm dusty circumstellar envelope surrounding a more evolved AGB star,
usually a Mira variable with SED profiles that peak at even longer
wavelengths than the normal D type between 20 and 30um.
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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 I3 --- ID Identifier (sequential number)
5- 32 A28 --- Name SySt catalog name
34- 40 F7.2 km/s Vr Radial velocity in the galactic plane
42- 46 F5.2 km/s e_Vr Error of Vr
48- 54 F7.2 km/s Vphi Azimuthal tangential velocity
56- 60 F5.2 km/s e_Vphi Error of Vphi
62- 68 F7.2 km/s Vz velocity perpendicular to the galactic plane
70- 74 F5.2 km/s e_Vz Error of Vz
76- 77 A2 --- Class Dynamic classification of the SySt (1)
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Note (1): Dynamic classification of the SySt as follows:
TD = thick disk
D = thin disk
H = halo
IB = "in-between"
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Acknowledgements:
Marco Laversveiler, marcoaurelio18(at)ov.ufrj.br
References:
Merc et al., 2019AN....340..598M 2019AN....340..598M, New online database of symbiotic variables:
Symbiotics in X-rays
Merc et al., 2019ESIL...41...78M 2019ESIL...41...78M, New Online Database of Symbiotic Variables
(End) Patricia Vannier [CDS] 10-Apr-2025