J/A+A/689/A270 An all-sky catalogue of stellar reddening values (Paunzen+, 2024)
An all-sky catalogue of stellar reddening values.
Paunzen E., Netopil M., Prisegen M., Faltova N.
<Astron. Astrophys. 689, A270 (2024)>
=2024A&A...689A.270P 2024A&A...689A.270P (SIMBAD/NED BibCode)
ADC_Keywords: Extinction ; Reddening ; Interstellar medium
Keywords: catalogs - stars: general - Hertzsprung-Russell and C-M diagrams -
dust, extinction - open clusters and associations: general
Abstract:
When observing astronomical objects, we have to deal with extinction
(i.e. the absorption and scattering of the emitted radiation by dust
and gas between the source and the observer). Interstellar extinction
depends on the location of the object and the wavelength. The
different extinction laws describing these effects are difficult to
estimate for a small sample of stars.
Many sophisticated and automatic methods have recently been developed
for estimating astrophysical parameters (age and metallicity, for
example) depending on the reddening, which is normally treated as a
free parameter within the corresponding estimations. However, many
reddening values for stars have been published over the last few
decades, most of which include observations in the ultraviolet, which
are essential for a good estimation but are essentially no longer
taken into account.
We searched the literature through the end of 2022 for published
independent reddening values of stellar objects based on
various methods that exclude estimates from reddening maps. In
addition, we present new reddening estimates based on the classical
photometric indices in the Geneva, Johnson, and Stromgren-Crawford
systems. These are based on well-established and reliable
calibrations.
After a careful identification procedure and quality assessment of the
data, we calculated the mean reddening values of 157631 individual
available measurements for 97826 objects. We compared our results
with the ones from recent automatic pipeline values, including those
from the Gaia consortium. In addition, we chose star cluster members
to compare their mean values with estimates for the corresponding
aggregates. Within the different references, we find several
statistically significant offsets and trends and discuss possible
explanations for them.
Our new catalogue can serve as a starting point for calibrating and
testing automatic tools such as isochrone and spectral energy
distribution fitting. Our sample covers the whole sky, including the
Galactic field, star clusters, and Magellanic Clouds, and so can be
used for a variety of astrophysical studies.
Description:
Compiling mean reddening values of stellar objects is essential for
calibrating and testing observations and models. The interstellar and
inter-cluster absorption must be considered for various aspects of
astrophysical studies. Its wavelength dependence and different
reddening laws due to multiple mixtures of interstellar gas and dust
make it necessary to work with a statistically sound sample of
objects. We present a catalogue of mean reddening values for 97826
objects distributed across the visible parts of the Milky Way and the
Magellanic Clouds.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 108 97826 The reddening data for our sample
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/349 : StarHorse, Gaia DR2 photo-astrometric distances (Anders+, 2019)
I/354 : StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
20- 29 F10.6 deg RAdeg Right ascension (J2000)
32- 41 F10.6 deg DEdeg Declination (J2000)
43- 49 F7.3 mag E(B-V) Mean reddening derived in this paper
52- 57 F6.3 mag s_E(B-V) Standard deviation of the mean reddening
derived in this paper
59- 60 I2 --- N Measurements and the values from the
literature used for E(B-V)
62- 68 F7.3 mag E(B-V)1 ?=-99.999 Reddening from
Chen et al. (2019MNRAS.483.4277C 2019MNRAS.483.4277C)
70- 76 F7.3 mag E(B-V)2 ?=-99.999 Reddening from Gaia DR2:
Andrae et al. (2018A&A...616A...8A 2018A&A...616A...8A, Cat. I/345)
78- 84 F7.3 mag E(B-V)3 ?=-99.999 Reddening from Gaia DR3:
Gaia Collaboration et al. (2021A&A...649A...1G 2021A&A...649A...1G,
Cat. I/350)
86- 92 F7.3 mag E(B-V)4 ?=-99.999 Reddening from StarHorse:
Anders et al. (2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349)
94-100 F7.3 mag E(B-V)5 ?=-99.999 Reddening from StarHorse2021:
Anders et al. (2022A&A...658A..91A 2022A&A...658A..91A, Cat. I/354)
102-108 F7.3 mag E(B-V)6 ?=-99.999 Reddening from Bayestar2019:
Green et al. (2019ApJ...887...93G 2019ApJ...887...93G)
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Acknowledgements:
Ernst Paunzen, epaunzen(at)physics.muni.cz
(End) E. Paunzen [Masaryk Univ,, Czech Republic], P. Vannier [CDS] 10-Sep-2024