The Puzzling Properties of the Helium White Dwarf Orbiting the Millisecond Pulsar PSR J1911-5958A in NGC 6752

2006 ◽  
Vol 641 (2) ◽  
pp. L129-L132 ◽  
Author(s):  
G. Cocozza ◽  
F. R. Ferraro ◽  
A. Possenti ◽  
N. D'Amico
Keyword(s):  
White Dwarf ◽  
Millisecond Pulsar

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

2019 ◽  
Vol 485 (3) ◽  
pp. 3715-3720 ◽  
Author(s):  
D M Beronya ◽  
A V Karpova ◽  
A Yu Kirichenko ◽  
S V Zharikov ◽  
D A Zyuzin ◽  
...  
Keyword(s):  
White Dwarf ◽  
Millisecond Pulsar ◽  
Helium Atmosphere

ABSTRACT 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.

scholarly journals The Temperature and Cooling Age of t h e White-Dwarf Companion to the Millisecond Pulsar PSR B1855+09

2000 ◽  
Vol 177 ◽  
pp. 633-634
Author(s):  
Jon Bell ◽  
Marten van Kerkwijk ◽  
Vicky Kaspi ◽  
Shri Kulkarni
Keyword(s):  
White Dwarf ◽  
White Dwarfs ◽  
Measured Temperature ◽  
Millisecond Pulsar ◽  
Nuclear Burning ◽  
Low Mass ◽  
Cooling Model ◽  
Age Discrepancy

AbstractWe report on Keck and HST observations of the binary millisecond pulsar PSR B1855+09. We detect its white-dwarf companion and measuremF555W= 25.90 ± 0.12 andmF814W= 24.19 ± 0.11 (Vega system). From the reddening-corrected color we infer a temperatureTeff= 4800 ± 800 K. The companion mass is known accurately from measurements of the Shapiro delay of the pulsar signal,. Given a cooling model, one can use the measured temperature to determine the cooling age. The main uncertainty in the cooling models for such low-mass white dwarfs is the amount of residual nuclear burning, which depends on the thickness of the hydrogen layer surrounding the helium core. For PSR B1855+09, such models lead to a cooling age of ∼10Gyr, which is twice the spin-down age of the pulsar. It may be that the pulsar does not brake (n=3.0) like a dipole rotatingin vacuo. For other pulsar companions, however, ages well over lOGyr are inferred, indicating that the problem may lie with the cooling models. There is no age discrepancy for models in which the white dwarfs are formed with thinner hydrogen layers (< 3 × 10−4M⊙). See van Kerkwijk et al. ApJ (submitted) for more details.

scholarly journals PSR J1738+0333: the first millisecond pulsar + pulsating white dwarf binary*

2014 ◽  
Vol 446 (1) ◽  
pp. L26-L30 ◽  
Author(s):  
Mukremin Kilic ◽  
J. J. Hermes ◽  
A. Gianninas ◽  
Warren R. Brown
Keyword(s):  
White Dwarf ◽  
Millisecond Pulsar

scholarly journals The evolution of helium white dwarfs: Applications for millisecond pulsars

2000 ◽  
Vol 177 ◽  
pp. 635-636 ◽  
Author(s):  
T. Driebe ◽  
T. Blöcker ◽  
D. Schönberner
Keyword(s):  
Mass Loss ◽  
White Dwarf ◽  
White Dwarfs ◽  
Binary Systems ◽  
Mass Star ◽  
Theoretical Studies ◽  
Millisecond Pulsar ◽  
Millisecond Pulsars ◽  
Low Mass ◽  
Red Giant

Low-mass white dwarfs with helium cores (He-WDs) are known to result from mass loss and/or exchange events in binary systems where the donor is a low mass star evolving along the red giant branch (RGB). Therefore, He-WDs are common components in binary systems with either two white dwarfs or with a white dwarf and a millisecond pulsar (MSP). If the cooling behaviour of He-WDs is known from theoretical studies (see Driebe et al. 1998, and references therein) the ages of MSP systems can be calculated independently of the pulsar properties provided the He-WD mass is known from spectroscopy.

scholarly journals A STRANGE STAR SCENARIO FOR THE FORMATION OF ECCENTRIC MILLISECOND PULSAR/HELIUM WHITE DWARF BINARIES

2015 ◽  
Vol 807 (1) ◽  
pp. 41 ◽  
Author(s):  
Long Jiang ◽  
Xiang-Dong Li ◽  
Jishnu Dey ◽  
Mira Dey
Keyword(s):  
White Dwarf ◽  
Strange Star ◽  
Millisecond Pulsar

scholarly journals Optical Identification of the Millisecond Pulsar J0621+2514

2018 ◽  
Vol 35 ◽  
Author(s):  
A. V. Karpova ◽  
D. A. Zyuzin ◽  
Yu. A. Shibanov ◽  
A. Yu. Kirichenko ◽  
S. V. Zharikov
Keyword(s):  
Survey Data ◽  
White Dwarf ◽  
White Dwarfs ◽  
Millisecond Pulsar ◽  
Optical Identification ◽  
Low Metallicity ◽  
Γ Ray ◽  
Visual Brightness

AbstractUsing the SDSS and Pan-STARRS1 survey data, we found a likely companion of the recently discovered binary γ-ray radio-loud millisecond pulsar J0621+2514. Its visual brightness is about 22 mag. The broadband magnitudes and colours suggest that this is a white dwarf. Comparing the data with various white dwarfs evolutionary tracks, we found that it likely belongs to a class of He-core white dwarfs with a temperature of about 10 000 K and a mass of ≲ 0.5 M⊙. For a thin hydrogen envelope of the white dwarf, its cooling age is ≲ 0.5 Gyr which is smaller than the pulsar characteristic age of 1.8 Gyr. This may indicate that the pulsar age is overestimated. Otherwise, this may be explained by the presence of a thick hydrogen envelope or a low metallicity of the white dwarf progenitor.

scholarly journals A Multiwavelength Study of Nearby Millisecond Pulsar PSR J1400−1431: Improved Astrometry and an Optical Detection of Its Cool White Dwarf Companion

2017 ◽  
Vol 847 (1) ◽  
pp. 25 ◽  
Author(s):  
J. K. Swiggum ◽  
D. L. Kaplan ◽  
M. A. McLaughlin ◽  
D. R. Lorimer ◽  
S. Bogdanov ◽  
...  
Keyword(s):  
White Dwarf ◽  
Optical Detection ◽  
Millisecond Pulsar

scholarly journals The Masses of the Millisecond Pulsar J1012+5307 and Its White Dwarf Companion

1996 ◽  
Vol 467 (2) ◽  
pp. L89-L92 ◽  
Author(s):  
M. H. van Kerkwijk ◽  
P. Bergeron ◽  
S. R. Kulkarni
Keyword(s):  
White Dwarf ◽  
Millisecond Pulsar ◽  
The Masses

scholarly journals Testing the Universality of Free Fall with the Triple System J0337+1715

2017 ◽  
Vol 13 (S337) ◽  
pp. 138-141 ◽  
Author(s):  
A. M. Archibald ◽  
N. V. Gusinskaia ◽  
J. W. T. Hessels ◽  
D. R. Lorimer ◽  
R. S. Lynch ◽  
...  
Keyword(s):  
White Dwarf ◽  
Triple System ◽  
Free Fall ◽  
Analysis Procedure ◽  
Time Of Arrival ◽  
Pulse Time ◽  
Millisecond Pulsar ◽  
Timing Model ◽  
Universality Of Free Fall ◽  
Pulsar Timing

AbstractThe millisecond pulsar PSR J0337+1715 is in a mildly relativistic hierarchical triple system with two white dwarfs. This offers the possibility of testing the universality of free fall: does the neutron star fall with the same acceleration as the inner white dwarf in the gravity of the outer white dwarf? We have carried out an intensive pulsar timing campaign, yielding some 27000 pulse time-of-arrival (TOA) measurements with a median uncertainty of 1.2 μs. Here we describe our analysis procedure and timing model.

scholarly journals Millisecond Pulsar Surveys

1996 ◽  
Vol 160 ◽  
pp. 3-10 ◽  
Author(s):  
M. Bailes
Keyword(s):  
Mass Loss ◽  
White Dwarf ◽  
Large Scale ◽  
Planetary System ◽  
Galactic Disk ◽  
Millisecond Pulsar ◽  
Millisecond Pulsars ◽  
Sky Surveys ◽  
Unique Object ◽  
Low Mass

AbstractThere are now more than 30 millisecond pulsars known to be associated with the Galactic disk. The majority of these have been discovered in just the last few years as the result of large-scale all-sky surveys. The properties of the population vary tremendously. One unique object hosts a planetary system, more than half of those discovered possess white dwarf companions, two have extremely low-mass companions that are undergoing mass-loss and several others appear to be solitary. In this review I discuss the methods employed to find these millisecond pulsars, the parallels with early surveys for “normal” pulsars, and possible strategies for future searches.

Sign in / Sign up

Export Citation Format

Share Document