2006A&A...450..295B


Query : 2006A&A...450..295B

2006A&A...450..295B - Astronomy and Astrophysics, volume 450, 295-303 (2006/4-4)

The ultra-cool white dwarf companion of PSR J0751+1807.

BASSA C.G., VAN KERKWIJK M.H. and KULKARNI S.R.

Abstract (from CDS):

We present optical and near-infrared observations with Keck of the binary millisecond pulsar PSR J0751+1807. We detect a faint, red object - with R=25.08±0.07, B-R=2.5±0.3, and R-I=0.90±0.10 - at the celestial position of the pulsar and argue that it is the white dwarf companion of the pulsar. The colours are the reddest among all known white dwarfs, and indicate a very low temperature, Teff≃4000K. This implies that the white dwarf cannot have the relatively thick hydrogen envelope that is expected on evolutionary grounds. Our observations pose two puzzles. First, while the atmosphere was expected to be pure hydrogen, the colours are inconsistent with this composition. Second, given the low temperature, irradiation by the pulsar should be important, but we see no evidence for it. We discuss possible solutions to these puzzles.

Abstract Copyright:

Journal keyword(s): stars: pulsars: individual: PSR J0751+1807 - stars: binaries: close - stars: neutron - stars: white dwarfs

Nomenclature: Fig.1, Table 2: [BVK2006] A (Nos A-H, X).

Simbad objects: 33

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Number of rows : 33
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 166 0
2 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 316 2
3 [HSH97] WD 0346+246 WD* 03 46 46.5167876352 +24 56 02.665383264   20.13 19.04 18.18   DC 63 1
4 SA 95- reg 03 53 21.0 -00 01 10           ~ 83 0
5 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 820 0
6 PSR B0613-02.0 Psr 06 13 43.9759 -02 00 47.228           ~ 225 1
7 PSR B0655+64 Psr 07 00 37.802 +64 18 11.20           ~ 240 1
8 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 876 0
9 2MASS J07510621+1807253 * 07 51 06.2029841160 +18 07 25.413888000   13.0 12.6     ~ 1 0
10 [BVK2006] E * 07 51 08.519 +18 07 59.89   24.56       ~ 1 0
11 [BVK2006] F * 07 51 08.859 +18 07 08.83   24.94       ~ 1 0
12 [BVK2006] G * 07 51 08.908 +18 07 35.71   25.65       ~ 1 0
13 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 264 1
14 [BVK2006] X * 07 51 09.158 +18 07 38.66   27.56       ~ 1 0
15 [BVK2006] A * 07 51 09.933 +18 07 05.97   21.73       ~ 1 0
16 [BVK2006] H * 07 51 10.691 +18 07 24.69   25.69       ~ 1 0
17 [BVK2006] D * 07 51 10.739 +18 07 32.79   24.28       ~ 1 0
18 [BVK2006] B * 07 51 10.844 +18 07 52.91   22.80       ~ 1 0
19 [BVK2006] C * 07 51 10.891 +18 07 35.69   24.30       ~ 1 0
20 PSR J1012+5307 Psr 10 12 33.4345449600 +53 07 02.548542576     19.5     DA 336 1
21 PSR J1045-45 Psr 10 45 50.18941 -45 09 54.1430           ~ 121 1
22 PSR J1232-6501 Psr 12 32 17.840 -65 01 03.33           ~ 23 0
23 SDSS J133739.40+000142.9 WD* 13 37 39.4074770664 +00 01 42.663463176   20.03       DC 32 0
24 LP 70-238 WD* 16 54 01.2602291775 +62 53 54.901854552   17.7       DC9 61 1
25 PSR J1713+0447 Psr 17 13 49.53053 +07 47 37.5264           ~ 405 1
26 PSR J1738+0333 Psr 17 38 53.96317 +03 33 10.8390           ~ 132 1
27 PSR J1745-0952 Psr 17 45 09.1400 -09 52 39.670           ~ 20 0
28 PSR B1855+09 Psr 18 57 36.39161 +09 43 17.2322           DA 495 1
29 PSR J1909-3744 Psr 19 09 47.42820 -37 44 14.7740           ~ 233 2
30 PSR J1911-11 Psr 19 11 49.2927 -11 14 22.330           ~ 66 1
31 PSR J1959+2048 Psr 19 59 36.7480 +20 48 14.599   20.4       ~ 743 2
32 GD 392B WD* 21 00 25.2288159312 +34 26 11.634154116   20.82 19.50 18.1 18.06 DC 12 0
33 PSR J2317+1439 Psr 23 17 09.230 +14 39 31.18           ~ 159 1

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2022.05.21-14:57:30

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