A Search for a Pulsar in the Remnant of SN 1987A with the Hubble Space Telescope High-Speed Photometer

We have used the High Speed Photometer (HSP) aboard the Hubble Space Telescope to observe the magnetic cataclysmic variables VV Pup, AM Her, and V834 Cen in the UV (1400…3300 Å) with 0.01 s time resolution. We detected low frequency flickering in all three systems, and compare the time-scales with the predictions of King (1989). At higher frequencies we searched for shock oscillations from the accretion column(s) in these systems. The data were analyzed using the Gabor transform wavelet-like technique (Heil & Walnut 1989) to search for frequency evolution throughout each observation. Preliminary analysis suggests the detection of rapid UV quasi-periodic oscillations (QPOs) in VV Pup at 0.74 Hz, and at 4.4 Hz in V834 Cen. As in ground based observations, our observations failed to yield any rapid QPOs in AM Her itself.

Download Full-text

High-Speed Hubble Space Telescope Ultraviolet photometry of two DB white dwarfs: Nonradial and radial pulsations

The Astronomical Journal ◽

10.1086/116854 ◽

1994 ◽

Vol 107 ◽

pp. 298 ◽

Cited By ~ 16

Author(s):

Steven D. Kawaler ◽

Howard E. Bond ◽

Lisa E. Sherbert ◽

Todd K. Watson

Keyword(s):

High Speed ◽

White Dwarfs ◽

Hubble Space Telescope ◽

Space Telescope ◽

Radial Pulsations

Download Full-text

The Polarization of the Crab Pulsar with HST

International Astronomical Union Colloquium ◽

10.1017/s0252921100041774 ◽

1996 ◽

Vol 160 ◽

pp. 301-302

Author(s):

Joseph F. Dolan ◽

Patricia T. Boyd ◽

Robert J. Hill ◽

F. Graham-Smith ◽

A. G. Lyne ◽

...

Keyword(s):

Time Resolution ◽

Linear Polarization ◽

High Speed ◽

Hubble Space Telescope ◽

Position Angle ◽

Crab Pulsar ◽

Pulse Profile ◽

Space Telescope ◽

Pulse Phase ◽

Sample Time

The linear polarization of the Crab pulsar as a function of pulse phase was observed by the High Speed Photometer on the Hubble Space Telescope in March, 1993. Observations were obtained in a bandpass centered on 2770 A using a 0.25 ms sample time, corresponding to a time resolution of 0.0075 in pulse phase. The UV polarization of the pulsar [Fig. 1] is strikingly similar to that observed in the visible (cf. Smith et al. 1988). The same values of polarization and the same swing of position angle occur through the main and secondary pulses. The polarization pulse profile must be essentially wavelength independent at frequencies above the infrared.

Download Full-text

Recent Hubble Space Telescope Observations of SN 1987A: Broad Emission Lines

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313009150 ◽

2013 ◽

Vol 9 (S296) ◽

pp. 1-8

Author(s):

Kevin France

Keyword(s):

Shock Front ◽

Hubble Space Telescope ◽

Neutral Hydrogen ◽

Maximum Velocity ◽

Physical Structure ◽

Late Time ◽

Reverse Shock ◽

Chemical Abundances ◽

Space Telescope ◽

Sn 1987A

AbstractObservations with the Hubble Space Telescope (HST), conducted since 1990, have allowed us to create a “movie” of the evolution of the core-collapse supernova SN 1987A from 3–25 years after the explosion. Critical to understanding the late time evolution of SN 1987A was the successful HST Servicing Mission 4 in May 2009. The repair of the STIS instrument and the installation of the WFC3 imager and COS spectrograph have provided crucial data points for understanding the temporal variability in the physical structure and energy sources for SN 1987A, as well as measurements of the chemical abundances of the ejecta. In this proceeding, I will focus on two topics that have made use of the expanded capability of HST and highlight the importance of access to a UV/optical space observatory for the studies of local supernovae: 1) 2) The decreasing maximum velocity of neutral hydrogen crossing the reverse shock front and the role of soft X-ray/EUV heating in the outer supernova debris and 2) The detection of metals (N4+ and C3+ ions) crossing the reverse shock front and CNO processing in the progenitor star.

Download Full-text

Hubble Space Telescope Observations of the SN 1987A Triple Ring Nebula

The Astrophysical Journal ◽

10.1086/176339 ◽

1995 ◽

Vol 452 ◽

pp. 680 ◽

Cited By ~ 119

Author(s):

Christopher J. Burrows ◽

John Krist ◽

J. Jeff Hester ◽

Raghvendra Sahai ◽

John T. Trauger ◽

...

Keyword(s):

Hubble Space Telescope ◽

Space Telescope ◽

Sn 1987A ◽

Ring Nebula

Download Full-text

Prospects for space Telescope in the search for other Planetary Systems

Symposium - International Astronomical Union ◽

10.1017/s0074180900146376 ◽

1985 ◽

Vol 112 ◽

pp. 75-84

Author(s):

J. L. Russell

Keyword(s):

High Speed ◽

Hubble Space Telescope ◽

Planetary Systems ◽

Wide Field ◽

Minor Planets ◽

Scientific Instruments ◽

The Moon ◽

Space Telescope ◽

Faint Object

The Hubble Space Telescope (ST) will be launched with five dedicated scientific instruments and a capability to do astrometric measurements with the fine guidance sensors. Four of these – the Faint Object Camera, the Wide Field Camera, the Fine Guidance Sensors and the High Speed Photometer – can be used in the search for extrasolar planetary systems. The Faint Object Camera will be able to directly detect planets around a few of the nearby bright stars. The Wide Field Camera and the Fine Guidance Sensors can be used astrometrically, both with an accuracy of about 2 mas per observation. The High Speed Photometer possibly can detect planets during occultation of stars by the moon and minor planets. The ST is expected to be launched in mid-1986 and these observations are the among the first planned with the instruments.

Download Full-text

The Matter Beyond the Ring: The Recent Evolution of SN 1987A Observed by the Hubble Space Telescope

The Astrophysical Journal ◽

10.3847/1538-4357/ab4ff2 ◽

2019 ◽

Vol 886 (2) ◽

pp. 147 ◽

Cited By ~ 5

Author(s):

J. Larsson ◽

C. Fransson ◽

D. Alp ◽

P. Challis ◽

R. A. Chevalier ◽

...

Keyword(s):

Hubble Space Telescope ◽

Space Telescope ◽

Sn 1987A

Download Full-text

Unseen companions of V Hya inferred from periodic ejections

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz1515 ◽

2019 ◽

Vol 487 (3) ◽

pp. 3029-3036 ◽

Cited By ~ 1

Author(s):

Jesus M Salas ◽

Smadar Naoz ◽

Mark R Morris ◽

Alexander P Stephan

Keyword(s):

Orbital Period ◽

Triple System ◽

High Speed ◽

Hubble Space Telescope ◽

Eccentric Orbit ◽

Brown Dwarf ◽

High Eccentricity ◽

Distant Object ◽

Space Telescope ◽

Ejection Mechanism

ABSTRACT A recent study using Hubble Space Telescope observations found periodic, high-speed, collimated ejections (or ‘bullets’) from the star V Hya. The authors of that study proposed a model associating these bullets with the periastron passage of an unseen, substellar companion in an eccentric orbit and with an orbital period of ∼8 yr. Here we propose that V Hya is part of a triple system, with a substellar companion having an orbital period of ∼8 yr, and a tertiary object on a much wider orbit. In this model, the more distant object causes high-eccentricity excitations on the substellar companion’s orbit via the Eccentric Kozai–Lidov mechanism. These eccentricities can reach such high values that they lead to Roche-lobe crossing, producing the observed bullet ejections via a strongly enhanced accretion episode. For example, we find that a ballistic bullet ejection mechanism can be produced by a brown-dwarf-mass companion, while magnetically driven outflows are consistent with a Jovian-mass companion. Finally, we suggest that the distant companion may reside at few a hundred astronomical units on an eccentric orbit.

Download Full-text