J/MNRAS/465/2849 Gaia DR1 mass-radius relation of white dwarfs (Tremblay+ 2017)
The Gaia DR1 mass-radius relation for white dwarfs.
Tremblay P.-E., Gentile-fusillo N., Raddi R., Jordan S., Besson C.,
Gansicke B.T., Parsons S.G., Koester D., Marsh T., Bohlin R., Kalirai J.,
Deustua S.
<Mon. Not. R. Astron. Soc., 465, 2849-2861 (2017)>
=2017MNRAS.465.2849T 2017MNRAS.465.2849T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, white dwarf ; Parallaxes, trigonometric ;
Stars, distances ; Stars, masses ; Stars, diameters
Keywords: parallaxes - stars: distances - stars: fundamental parameters -
stars: interiors - white dwarfs
Abstract:
The Gaia Data Release 1 (DR1) sample of white dwarf parallaxes is
presented, including six directly observed degenerates and 46 white
dwarfs in wide binaries. This data set is combined with spectroscopic
atmospheric parameters to study the white dwarf mass-radius
relationship (MRR). Gaia parallaxes and G magnitudes are used to
derive model atmosphere-dependent white dwarf radii, which can then be
compared to the predictions of a theoretical MRR. We find a good
agreement between Gaia DR1 parallaxes, published effective
temperatures (Teff) and surface gravities (logg), and theoretical
MRRs. As it was the case for Hipparcos, the precision of the data does
not allow for the characterization of hydrogen envelope masses. The
uncertainties on the spectroscopic atmospheric parameters are found to
dominate the error budget and current error estimates for well-known
and bright white dwarfs may be slightly optimistic. With the much
larger Gaia DR2 white dwarf sample, it will be possible to explore the
MRR over a much wider range of mass, Teff, and spectral types.
Description:
The Gaia DR1 (Cat. I/337) sample of parallaxes was presented for 6
directly observed white dwarfs and 46 members of wide binaries. By
combining this data set with spectroscopic atmospheric parameters, we
have derived the semi-empirical MRR relation for white dwarfs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 127 24 Parallaxes of directly observed white dwarfs
table2.dat 78 62 White dwarfs in wide binaries: binary parameters
table3.dat 118 62 Parallaxes of white dwarfs in wide binaries
table4.dat 77 50 Semi-empirical white dwarf mass-radius relation
refs.dat 92 41 References
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See also:
B/wd : Spectroscopically identified white dwarfs (McCook+, 2014)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name WD name (HHMM+DDM)
10- 24 A15 --- AName Alternative Name
26- 40 A15 --- HIP/Tyc HIP/Tycho ID
42- 47 F6.2 mas Plx ?=- Gaia parallax
49- 52 F4.2 mas e_Plx ? rms uncertainty on Plx (1)
54- 59 F6.3 mag Gmag ?=- Gaia G magnitude
61- 65 F5.3 mag e_Gmag ?=- rms uncertainty on Gmag
67- 72 F6.2 mas PlxO ?=- Parallax from other origin
74- 78 F5.2 mas e_PlxO ? rms uncertainty on PlxO
80 I1 --- r_PlxO ?=- Reference for PlxO, in refs.dat file
82- 86 F5.2 mag Vmag V magnitude
88- 91 F4.2 mag e_Vmag rms uncertainty on Vmag
93 I1 --- r_Vmag Reference for Vmag, in refs.dat file
95-100 A6 --- SpType Spectral type (2)
102-106 I5 K Teff Effective temperature
108-111 I4 K e_Teff rms uncertainty on Teff
113-116 F4.2 [cm/s2] logg ?=- Spectroscopic surface gravity (3)
118-121 F4.2 [cm/s2] e_logg ? rms uncertainty on logg
123-127 A5 --- r_Teff Reference for Teff and logg, in refs.dat file
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Note (1): The Gaia uncertainties include both the random errors and a
systematic error of 0.3mas (Gaia Collaboration, 2016, Cat. I/337).
Note (2): DA+BP stands for a DA white dwarf with the Balmer line problem
(see Section 2.1).
Note (3): Only spectroscopic logg determinations are included and not the
derivations based on the parallax measurements.
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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- 15 A15 --- Name WD name (HHMM+DDM) or other names
17- 31 A15 --- AName Alternative Name
33- 47 A15 --- Primary Primary name
49- 63 A15 --- HIP/Tyc HIP/Tycho ID
65- 69 F5.2 mag Vmag V magnitude of the primary
71- 75 F5.1 arcsec Sep Separation
77- 78 I2 --- Ref Reference, in refs.dat file
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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- 15 A15 --- Name WD name (HHMM+DDM) or other names
17- 31 A15 --- AName Alternative Name
32- 37 F6.2 mas Plx ?=- Gaia parallax
39- 42 F4.2 mas e_Plx ? rms uncertainty on Plx (1)
44- 49 F6.3 mag Gmag ?=- Gaia G magnitude
51- 55 F5.3 mag e_Gmag ?=- rms uncertainty on Gmag
57- 62 F6.2 mas PlxO ?=- Parallax from other origin
64- 67 F4.2 mas e_PlxO ? rms uncertainty on PlxO
69 I1 --- r_PlxO ?=- Reference for PlxO, in refs.dat file
71- 75 F5.2 mag Vmag ?=- V magnitude
77- 80 F4.2 mag e_Vmag ? rms uncertainty on Vmag
82- 83 I2 --- r_Vmag ?=- Reference for Vmag, in refs.dat file
85- 89 A5 --- SpType Spectral type (2)
91- 95 I5 K Teff ?=- Effective temperature
97- 99 I3 K e_Teff ? rms uncertainty on Teff
101-104 F4.2 [cm/s2] logg ?=- Spectroscopic surface gravity (3)
106-109 F4.2 [cm/s2] e_logg ? rms uncertainty on logg
111-118 A8 --- r_Teff Reference for Teff and logg, in refs.dat file
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Note (1): The Gaia uncertainties include both the random errors and a
systematic error of 0.3mas (Gaia Collaboration, 2016, Cat. I/337).
Note (2): Spectral types with the ':' symbol are uncertain.
Note (3): Only spectroscopic logg determinations are included and not the
derivations based on the parallax measurements.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- Sample [DW] sample (1)
3- 17 A15 --- Name WD name (HHMM+DDM) or other names
19- 23 F5.3 Msun MassH ?=- Mass from Hipparcos data
25- 29 F5.3 Msun e_MassH ? rms uncertainty on MassH
31- 35 F5.3 0.01Rsun RadH ?=- Radius from Hipparcos data
37- 41 F5.3 0.01Rsun e_RadH ?=- rms uncertainty on RadH
43- 47 F5.3 Msun MassG ?=- Mass from Gaia data
49- 53 F5.3 Msun e_MassG ? rms uncertainty on MassG
55- 59 F5.3 0.01Rsun RadG ?=- Radius from Gaia data
61- 65 F5.3 0.01Rsun e_RadG ?=- rms uncertainty on RadG
67- 71 F5.3 0.01Rsun RadMRR Radius from MMR (mass-radius relationship)
73- 77 F5.3 0.01Rsun e_RadMRR rms uncertainty on RadMMR
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Note (1): Sample as follows:
D = Directly observed white dwarfs
W = White dwarfs in wide binaries
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 53 A30 --- Aut Author's name
55- 92 A38 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Nov-2018