Science Archives Publication System

Far-infrared and molecular line observations of Lynds 183 - Studies of cold gas and dust

DOI: 10.1051/0004-6361:20011539 Bibcode: 2002A&A...382..583J

Prusti, T.; Juvela, M.; Lemke, D. +3 more

We have mapped the dark cloud L183 in the far-infrared at 100 mu m and 200 mu m with the ISOPHOT photometer aboard the ISO satellite. The observations make it possible for the first time to study the distribution and properties of the large dust grains in L183 without confusion from smaller grains. The observations show clear colour temperature va…

2002 • Astronomy and Astrophysics

ISO 37

Ongoing Massive Star Formation in the Bulge of M51

DOI: 10.1086/338273 Bibcode: 2002ApJ...566..818L

Panagia, N.; Spaans, M.; Romaniello, M. +4 more

We present a study of Hubble Space Telescope Wide Field Planetary Camera 2 observations of the inner kiloparsec of the interacting galaxy M51 in six bands from 2550 to 8140 Å. The images show an oval-shaped area (which we call the ``bulge'') of about 11^''×16^'', or 450×650 pc, around the nucleus that is dominated by a smooth `…

2002 • The Astrophysical Journal

eHST 37

The Host Galaxies of Radio-loud Active Galactic Nuclei: The Black Hole-Galaxy Connection

DOI: 10.1086/343126 Bibcode: 2002ApJ...580...96O

Urry, C. Megan; O'Dowd, Matthew; Scarpa, Riccardo

We have studied the host galaxies of a sample of radio-loud active galactic nuclei (AGNs) spanning more than 4 decades in the energy output of the nucleus. The core sample includes 40 low-power sources (BL Lac objects) and 22 high-power sources (radio-loud quasars) spanning the redshift range 0.15<~z<~0.5, all imaged with the high spatial re…

2002 • The Astrophysical Journal

eHST 37

Analysis of H₂ Emission from Mira B in Ultraviolet Spectra from the Hubble Space Telescope

DOI: 10.1086/341478 Bibcode: 2002ApJ...575.1057W

Wood, Brian E.; Raymond, John C.; Karovska, Margarita

We analyze Lyα fluoresced H₂ lines observed in the UV spectrum of Mira B. We identify 13 different sequences fluoresced by 13 different H₂ transitions within the Lyα line. The observed H₂ line ratios within these sequences imply significant line opacity, so we use a Monte Carlo radiative transfer code to model the …

2002 • The Astrophysical Journal

IUE eHST 37

Very Large Telescope Spectra of Carbon Stars in the Large Magellanic Cloud and Their Metallicity Dependence

DOI: 10.1086/345680 Bibcode: 2002ApJ...580L.133M

Waters, L. B. F. M.; van Loon, J. Th.; Yamamura, I. +4 more

Very Large Telescope (VLT) L-band spectra of six carbon stars in the Large Magellanic Cloud are presented. The stars show absorption bands at 3.1 µm (HCN and C₂H₂), and 3.8 µm, which is probably due to C₂H₂. Two LMC stars show strong 3.5 µm HCN absorption. The equivalent widths of the 3…

2002 • The Astrophysical Journal

ISO 37

Cosmic shear from STIS pure parallels. II. Analysis

DOI: 10.1051/0004-6361:20020195 Bibcode: 2002A&A...385..743H

White, S. D. M.; Fosbury, R. A. E.; Schneider, P. +6 more

We report on the marginal detection of cosmic shear on sub-arcmin scales with archive data from the STIS camera on board HST. For the measurement 121 galaxy fields with a field of view of 51'' x 51'' are used to obtain an rms cosmic shear of ~ 4% with 1.5sigma significance. This value is consistent with groundbased results obtained by other groups…

2002 • Astronomy and Astrophysics

eHST 37

Survey of the ISM in early-type galaxies. IV. The hot dust component

DOI: 10.1051/0004-6361:20020582 Bibcode: 2002A&A...389..355F

Panagia, N.; Macchetto, F. D.; Pastoriza, M. G. +3 more

We present mid-IR photometric properties for a sample of 28 early-type galaxies observed at 6.75, 9.63 and 15 mu m with the ISOCAM instrument on board the ISO satellite. We find total mid-IR luminosities in the range (3-42) x 10⁸ L_sun. The spectral energy distributions (SED) of the galaxies were derived using the mid-IR data …

2002 • Astronomy and Astrophysics

ISO 37

Keck Spectroscopy of Young and Old Star Clusters in NGC 1023

DOI: 10.1086/338900 Bibcode: 2002AJ....123.1488L

Brodie, Jean P.; Larsen, Søren S.

We present Keck/LRIS spectra for 11 old globular clusters in the S0-type galaxy NGC 1023 and two young blue clusters in the nearby companion NGC 1023A. Analysis of the spectra of seven old clusters with sufficient signal-to-noise ratio shows generally good agreement between spectroscopic and previous photometric metallicity estimates, but the inte…

2002 • The Astronomical Journal

eHST 37

Polaris: Amplitude, Period Change, and Companions

DOI: 10.1086/338583 Bibcode: 2002ApJ...567.1121E

Evans, Nancy Remage; Short, C. Ian; Sasselov, Dimitar D.

Polaris has presented us with the rare phenomenon of a Cepheid with a pulsation amplitude that has decreased over the last 50 yr. In this study we have used this property to see whether the amplitude decrease during the last 15 yr has had any effect on upper atmosphere heating. We obtained IUE high- and low-resolution spectra but found no change i…

2002 • The Astrophysical Journal

IUE 36

Magnetospheric responses to sudden and quasiperiodic solar wind variations

DOI: 10.1029/2002JA009342 Bibcode: 2002JGRA..107.1406K

Kim, K. -H.; Andre, M.; Mozer, F. S. +5 more

On April 13 (day 103), 2001, 0700-1400 UT, the Polar satellite experienced different plasma regimes (i.e., magnetosphere, magnetosheath, and solar wind) because of the solar wind dynamic pressure variations and its high orbital inclination near the subsolar magnetopause meridian. When Polar was in the magnetosheath, quasiperiodic spacecraft potent…

2002 • Journal of Geophysical Research (Space Physics)

Cluster 36