2019MNRAS.485.3715B


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST04:35:13

2019MNRAS.485.3715B - Mon. Not. R. Astron. Soc., 485, 3715-3720 (2019/May-3)

The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?

BERONYA D.M., KARPOVA A.V., KIRICHENKO A.Y., ZHARIKOV S.V., ZYUZIN D.A., SHIBANOV Y.A. and CABRERA-LAVERS A.

Abstract (from CDS):

We report detection of the likely companion of the binary millisecond pulsar (MSP) J0740+6620 with the Gran Telescopio Canarias in the r' and i' bands. The position of the detected starlike source coincides with the pulsar coordinates within the 1σ uncertainty of ≃0.2 arcsec. Its magnitudes are r' = 26.51 ± 0.17 and i' = 25.49 ± 0.15. Comparing the data with the white dwarf (WD) cooling tracks suggests that it can be an ultracool helium-atmosphere WD with the temperature <=3500 K and cooling age >=5 Gyr. The age is consistent with the pulsar characteristic age corrected for kinematic effects. This is the reddest source among known WD companions of MSPs. Detection of the source in other bands would be useful to clarify its properties and nature.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: neutron - pulsars: general - binaries: general - pulsars: individual: PSR J0740+6620

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR J0337+1715 Psr 03 37 43.82589 +17 15 14.8280           ~ 72 0
2 WD 0343+247 WD* 03 46 46.5159080507 +24 56 02.666181750   20.13 19.04 18.18   DC 61 1
3 PSR J0348+0432 Psr 03 48 43.6365407296 +04 32 11.460202882           ~ 184 1
4 PSR J0614-3329 Psr 06 14 10.3479 -33 29 54.116           ~ 75 1
5 PSR J0621+2514 Psr 06 21 15.2 +25 12 27           ~ 11 0
6 PSR J0737-3039A Psr 07 37 51.24720 -30 39 40.6700           ~ 237 1
7 PSR J0740+6620 Psr 07 40 45.799 +66 20 33.60           ~ 98 0
8 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 261 1
9 PSR J1012+5307 Psr 10 12 33.4341531837 +53 07 02.564526788     19.5     DA 329 1
10 SDSS J110217.48+411315.4 WD* 11 02 17.5223921828 +41 13 21.181894975           DC 15 0
11 EGGR 76 WD* 11 07 59.9504082308 -05 09 26.033453412 12.397 13.093 13.057 13.141 13.215 DA3 143 0
12 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 93 0
13 2FGL J1417.5-4404 LXB 14 17 16.80 -44 04 40.5           ~ 37 0
14 PSR J1915+1606 Psr 19 15 27.99999 +16 06 27.4034     22.5     ~ 937 1
15 PSR B1937+21 Psr 19 39 39.6 +21 37 22           ~ 983 2
16 PSR J2317+1439 Psr 23 17 09.230 +14 39 31.18           ~ 155 1

    Equat.    Gal    SGal    Ecl

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2021.05.18-04:35:13

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