Hubble Space Telescope NICMOS Observations of Classical Nova Shells

Details Hubble Space Telescope NICMOS Observations of Classical Nova Shells Hubble Space Telescope NICMOS Observations of Classical Nova Shells

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....124.2888k&link_type=abstract

The Astronomical Journal, Volume 124, Issue 5, pp. 2888-2898.

Astronomy and Astrophysics

Astronomy

13

Stars: Novae, Cataclysmic Variables, Stars: Individual: Constellation Name: V723 Cassiopeiae, Stars: Individual: Constellation Name: Nova Cassiopeia 1995, Stars: Individual: Constellation Name: V1974 Cygni, Stars: Individual: Constellation Name: Nova Cygnus 1992, Stars: Individual: Constellation Name: Qu Vulpeculae, Stars: Individual (Nova Vulpecula 1984 No. 2, Qv Vulpeculae), Stars: Individual: Constellation Name: Nova Vulpecula 1987

Scientific paper

We present results of a campaign to obtain near-infrared images of evolved classical nova shells by using the Near-Infrared Camera and Multi-Image Spectrometer (NICMOS) on the Hubble Space Telescope. Images were obtained in six filters from 1.87 to 2.37 μm. Three of our four targets, QV Vulpeculae (Nova Vul 1987), QU Vulpeculae (Nova Vul 1984 No. 2), and V1974 Cygni (Nova Cyg 1992) exhibit pronounced shell emission in the narrowband Paα (F187N) filter. In the other five filters, the shells are only marginally detected with the exception of QU Vul, which exhibits spatially extended low surface brightness emission in the medium-band filter (F222M) centered near 2.22 μm. Spatially extended emission from V723 Cassiopeiae (Nova Cas 1995) was not detected above the image noise in any filter. The observed ejecta geometries lend further support to the suggestion that the speed class of a nova may correlate with the shape of the shells. The NICMOS images, in combination with ground-based spectroscopic determination of the ejecta expansion velocities, enable us to estimate the expansion parallaxes for V1974 Cyg, QU Vul, and QV Vul. Of note, the expansion velocity (in milliarcseconds per day) determined for V1974 Cyg has remained constant over the 4 year period (1993-1998) after onset of the optical thin phase. Lastly, more structures in the shell of V1974 Cyg have appeared since 1993.
Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

Affiliated with

Also associated with

No associations

Rating

Hubble Space Telescope NICMOS Observations of Classical Nova Shells does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hubble Space Telescope NICMOS Observations of Classical Nova Shells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hubble Space Telescope NICMOS Observations of Classical Nova Shells will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-735110