Science Archives Publication System

Infrared Space Observatory Short Wavelength Spectrometer Observations of H II Regions in NGC 6822 and I Zwicky 36: Sulfur Abundances and Temperature Fluctuations

DOI: 10.1086/344299 Bibcode: 2002ApJ...581.1002N

Skillman, Evan D.; Garnett, Donald R.; Dinerstein, Harriet L. +1 more

We report Infrared Space Observatory (ISO) Short Wavelength Spectrometer infrared spectroscopy of the H II region Hubble V in NGC 6822 and the blue compact dwarf galaxy I Zw 36. Observations of Brα, [S III] at 18.7 and 33.5 µm, and [S IV] at 10.5 µm are used to determine ionic sulfur abundances in these H II regions. There is relativel…

2002 • The Astrophysical Journal

ISO 10

A Chemically Decoupled Nucleus and Inner Polar Ring of the SBb Galaxy NGC 4548

DOI: 10.1134/1.1467255 Bibcode: 2002AstL...28..207S

Sil'chenko, O. K.

2002 • Astronomy Letters

eHST 10

The Environment of FS Tauri Observed with Hubble Space Telescope Wide Field Planetary Camera 2 in Narrowband Emission Line Filters

DOI: 10.1086/324274 Bibcode: 2002ApJ...564..834W

Eislöffel, Jochen; Mundt, Reinhard; Ray, Thomas P. +1 more

We present the results of Hubble Space Telescope Wide Field Planetary Camera (WFPC2) observations of FS Tau and its environment obtained in the narrowband emission line filters Hα and [S II] λλ6716,6731 Å. Based on these data the morphology of line emission within this region can be studied on a size scale of 0.1" for the first time. Despite the f…

2002 • The Astrophysical Journal

eHST 10

Hubble Space Telescope NICMOS Images of the HH 7/11 Outflow in NGC 1333

DOI: 10.1086/343784 Bibcode: 2002ApJ...580..959N

Noriega-Crespo, A.; Young, E.; Chen, H. +1 more

We present near-infrared images in H₂ at 2.12 µm of the HH 7/11 outflow and its driving source SVS 13 taken with the Hubble Space Telescope NICMOS2 camera, as well as archival Hα and [S II] optical images obtained with the Wide Field Planetary Camera 2 (WFPC2). The Near-Infrared Camera and Multi-Object Spectrometer high angular re…

2002 • The Astrophysical Journal

eHST 10

A comparison of mean density and microscale density fluctuations in a CME at 10 R_solar

DOI: 10.1029/2001GL014152 Bibcode: 2002GeoRL..29.1913L

Lynch, B. J.; Sheeley, N. R.; Coles, W. A.

We have observed intensity scintillation (IPS) of the radio source 0854 + 201 at 8 GHz on August 2, 2000 during the passage of a coronal mass ejection (CME) across the line of sight. The source was at a distance of 10 R_solar over the north solar pole. Simultaneous observations with the LASCO C3 instrument allow us to model the mean dens…

2002 • Geophysical Research Letters

SOHO 10

Interpreting the M22 Spike Events

DOI: 10.1086/338041 Bibcode: 2002ApJ...566..452G

Gaudi, B. Scott

Recently Sahu et al., using the Hubble Space Telescope to monitor stars in the direction of the old (~12 Gyr) globular cluster M22, detected six events in which otherwise constant stars brightened by ~50% during a time of <~1 day. They tentatively interpret these unresolved events as being caused by microlensing of background bulge stars by fre…

2002 • The Astrophysical Journal

eHST 10

Boron in the Small Magellanic Cloud: A Novel Test of Light-Element Production

DOI: 10.1086/340662 Bibcode: 2002ApJ...573..584B

Lambert, D. L.; Cunha, K.; Venn, K. A. +3 more

Hubble Space Telescope Space Telescope Imaging Spectrograph (STIS) observations of the B III resonance line at λ2066 have been obtained and analyzed for two Small Magellanic Cloud (SMC) B-type stars. While boron is not detected in either star, upper limits to the boron abundance are set, with 12+log(B/H)<=1.6 for both AV 304 and NGC 346-637. Th…

2002 • The Astrophysical Journal

eHST 10

A Preliminary Radial-Velocity Curve for the Star θ1 Ori D

DOI: 10.1134/1.1525835 Bibcode: 2002AstL...28..843V

Vitrichenko, É. A.

2002 • Astronomy Letters

IUE 10

The origin of the anomalous intensity ratio between very bright UV FeII lines and their satellites in gaseous condensations close to the star eta Carinae

DOI: 10.1051/0004-6361:20020059 Bibcode: 2002A&A...385..313K

Johansson, S.; Letokhov, V. S.; Klimov, V.

We present a model that explains the anomalous intensity ratios between each of two very bright UV lines of Fe II at 2507 Å and 2509 Å and its corresponding satellite line, observed in HST spectra of a compact gaseous condensation (blob B) in the vicinity of the star protect eta Car.The model is based on the assumption that the FeII transitions ha…

2002 • Astronomy and Astrophysics

eHST 10

An unusual iron Lo-BAL quasar detected by ISOCAM

DOI: 10.1051/0004-6361:20020663 Bibcode: 2002A&A...389L..47D

Elbaz, D.; Cesarsky, C.; Duc, P. -A. +10 more

We report the discovery of an unusual low-ionization broad absorption line quasar at z=1.776 which exhibits absorption lines from many excited states of Fe II. This member of the rare class of ``FeLoBAL'' quasars was serendipitously found in a mid-infrared (MIR) survey of distant clusters carried out with the ISOCAM camera. ISO J005645.1-273816 ha…

2002 • Astronomy and Astrophysics

ISO eHST 10