Science Archives Publication System

Locating the Starburst in the SCUBA Galaxy SMM J14011+0252

DOI: 10.1086/324560 Bibcode: 2001ApJ...561L..45I

Kneib, J. -P.; Ivison, R. J.; Frayer, D. T. +2 more

We present new, multiwavelength, high-resolution imaging of the luminous, submillimeter galaxy SMM J14011+0252, an interacting starburst at z=2.56. Our observations comprise optical imaging from the Hubble Space Telescope, sensitive radio mapping from the Very Large Array, and CO observations from the Owens Valley Radio Observatory and Berkeley-Il…

2001 • The Astrophysical Journal

eHST 75

Absorption and Reddening in the Seyfert Galaxy NGC 3227

DOI: 10.1086/321522 Bibcode: 2001ApJ...555..633C

Kraemer, S. B.; Crenshaw, D. M.; Bruhweiler, F. C. +1 more

We have obtained low-dispersion spectra of NGC 3227 with the Space Telescope Imaging Spectrograph (STIS) to study the intrinsic UV absorption and the reddening of the nucleus in this Seyfert 1 galaxy. The UV spectra show a wealth of absorption lines at the systemic redshift that span a wide range in ionization state (Mg I to N V). The equivalent w…

2001 • The Astrophysical Journal

eHST 74

Low-Degree Low-Order Solar p Modes As Seen By GOLF On board SOHO

DOI: 10.1023/A:1010344721148 Bibcode: 2001SoPh..200..361G

Kosovichev, A. G.; Henney, C. J.; García, R. A. +8 more

Data recovered from the GOLF experiment on board the ESA/NASA SOHO spacecraft have been used to analyze the low-order low-degree solar velocity acoustic-mode spectrum below ν=1.5 mHz (i.e., 1≤n≤9,l≤2). Various techniques (periodogram, RLAvCS, homomorphic-deconvolution and RLSCSA) have been used and compared to avoid possible biases due to a given …

2001 • Solar Physics

SOHO 74

NICMOS imaging search for high-redshift damped Lyα galaxies

DOI: 10.1046/j.1365-8711.2001.04629.x Bibcode: 2001MNRAS.326..759W

Jakobsen, P.; Fall, S. M.; Møller, P. +1 more

We are engaged in a programme of imaging with the STIS and NICMOS (NIC2) instruments aboard the Hubble Space Telescope (HST), to search for the galaxy counterparts of 18 high-redshift z>1.75 damped Lyα absorption lines and five Lyman-limit systems seen in the spectra of 16 target quasars. This paper presents the results of the imaging campaign …

2001 • Monthly Notices of the Royal Astronomical Society

eHST 73

Damped Lyα Absorption from a Nearby Low Surface Brightness Galaxy

DOI: 10.1086/319421 Bibcode: 2001AJ....121.1456B

Bowen, David V.; Tripp, Todd M.; Jenkins, Edward B.

Ground-based and Hubble Space Telescope (HST) images of the nearby galaxy SBS 1543+593 (z=0.009) show it to be a low surface brightness (LSB) galaxy with a central surface brightness µ_B(0)=23.2 mag arcsec^-2 and scale length 0.9 h^-1₁₀₀ kpc, values typical for the local LSB galaxy population. The gal…

2001 • The Astronomical Journal

eHST 73

Variable Stars in the Unusual, Metal-Rich, Globular Cluster NGC 6441

DOI: 10.1086/323447 Bibcode: 2001AJ....122.2600P

Pritzl, Barton J.; Smith, Horace A.; Sweigart, Allen V. +1 more

We have undertaken a search for variable stars in the metal-rich globular cluster NGC 6441 using time-series BV photometry. The total number of variables found near NGC 6441 has been increased to ~104, with 48 new variables being found in this survey. A significant number of the variables are RR Lyrae stars (~46), most of which are probable cluste…

2001 • The Astronomical Journal

eHST 73

Circumstellar structure of RU Lupi down to au scales

DOI: 10.1046/j.1365-8711.2001.04172.x Bibcode: 2001MNRAS.323..177T

Gledhill, T. M.; Hough, J. H.; Chrysostomou, A. +2 more

We have used the technique of spectro-astrometry to study the milliarcsecond scale structure of the emission lines in the T Tauri star RU Lupi. The wings of the Hα emission are found to be displaced from the star towards the south-west (blue wing) and north-east (red wing) with angular scales of 20-30mas. This structure is consistent with a bipola…

2001 • Monthly Notices of the Royal Astronomical Society

ISO 73

Structure and physical properties of the rapidly evolving dusty envelope of IRC +10 216 reconstructed by detailed two-dimensional radiative transfer modeling

DOI: 10.1051/0004-6361:20000554 Bibcode: 2001A&A...368..497M

Weigelt, G.; Men'shchikov, A. B.; Balega, Y. +2 more

We present the first detailed, two-dimensional radiative transfer model of the dusty envelope around the carbon star IRC +10 216. Our goal was to find a self-consistent model of the star and its envelope which takes into account as many observational constraints as possible. The model reproduces very well the entire beam-matched…

2001 • Astronomy and Astrophysics

eHST 73

Surveying the sky with the Arcminute MicroKelvin Imager: expected constraints on galaxy cluster evolution and cosmology

DOI: 10.1046/j.1365-8711.2001.04815.x Bibcode: 2001MNRAS.328..783K

Lasenby, Anthony N.; Cotter, Garret; Grainge, Keith +4 more

We discuss prospects for cluster detection via the Sunyaev-Zel'dovich (SZ) effect in a blank field survey with the interferometer array, the Arcminute MicroKelvin Imager (AMI). Clusters of galaxies selected in the SZ effect probe cosmology and structure formation with little observational bias, because the effect measures integrated gas pressure d…

2001 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 72

A Dynamical Mass Constraint for Pre-Main-Sequence Evolutionary Tracks: The Binary NTT 045251+3016

DOI: 10.1086/321155 Bibcode: 2001AJ....122..997S

Latham, David W.; Mazeh, Tsevi; Prato, L. +6 more

We present an astrometric-spectroscopic orbital solution for the pre-main-sequence binary NTT 045251+3016. Interferometric observations with the HST Fine Guidance Sensor No. 3 allowed stellar separations as small as 14 mas to be measured. Optical spectra provided 58 radial velocity measurements of the primary star, and near-infrared spectra provid…

2001 • The Astronomical Journal

eHST 72