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19922026
Showing 1998 · astro-phShow all

8 papers · 2 filters

astro-ph1998★ 74 cited

Prospects for Measuring Differential Rotation in White Dwarfs Through Asteroseismology

Steven D. Kawaler, Takashi Sekii, Douglas Gough

We examine the potential of asteroseismology for exploring the internal rotation of white dwarf stars. Data from global observing campaigns have revealed a wealth of frequencies, s…

astro-ph1998★ 28 cited

The Molecule-Rich Tail of the Peculiar Galaxy NGC 2782 (Arp 215)

Beverly J. Smith, Curtis Struck, Jeffrey D. P. Kenney +1

We present the first detection of a large quantity of molecular gas in the extended tail of an interacting galaxy. Using the NRAO 12m telescope, we have detected CO (1 - 0) at five…

astro-ph1998★ 3 cited

Dust in the Wheel: The Cartwheel Galaxy in the Mid-IR

V. Charmandaris, O. Laurent, I. F. Mirabel +5

We present mid-infrared images at and of ``The Cartwheel'' (AM~0035-33), the prototypical collisional ring galaxy. The observations, taken with ISOCAM, reveal the…

astro-ph1998

Multi-wavelength Observations of VHE BL Lac Objects

M. Catanese

We present multi-wavelength observations of the very high energy (VHE, E >250 GeV) gamma-ray sources Mrk 421 and Mrk 501. The VHE data presented here were taken with the Whipple Ob…

astro-ph1998★ 83 cited

Measurement of the Multi-TeV gamma-ray Flare-Spectra of Markarian 421 and Markarian 501

F. Krennrich, S. D. Biller

The energy spectrum of Markarian~421 in flaring states has been measured from 0.3 to 10 TeV using both small zenith angle and large zenith angle observations with the Whipple Obser…

astro-ph1998★ 75 cited

Dust Spirals and Acoustic Noise in the Nucleus of the Galaxy NGC 2207

B. G. Elmegreen, D. M. Elmegreen, E. Brinks +6

Observations with the Hubble Space Telescope reveal an irregular network of dust spiral arms in the nuclear region of the interacting disk galaxy NGC 2207. The spirals extend from…

astro-ph1998★ 77 cited

New Limits to the IR Background: Bounds on Radiative Neutrino Decay and on VMO Contributions to the Dark Matter Problem

S. D. Biller, J. Buckley, A. Burdett +20

From considering the effect of gamma-gamma interactions on recently observed TeV gamma-ray spectra, improved limits are set to the density of extragalactic infrared (IR) photons wh…

astro-ph1998★ 1 cited

White dwarf stars and the Hubble Deep Field

Steven D. Kawaler

Although it a very narrow angle survey, the depth of the HDF results in its sampling a significant volume of the halo of our galaxy. Thus it is useful for the purposes of detecting…