Astrophysics

Authors and titles for April 2000

[151] arXiv:astro-ph/0004152 [pdf, other]

Title: Measurements with the Chandra X-Ray Observatory's flight contamination monitor

R. F. Elsner, J. J. Kolodziejczak, S. L. O'Dell, D. A. Swartz, A. F. Tennant, M. C. Weisskopf

Comments: 7pages,8figures,for SPIE 4012, paper 70

Subjects: Astrophysics (astro-ph)

[152] arXiv:astro-ph/0004153 [pdf, other]

Title: Optimal Masks for Low-Degree Solar Acoustic Modes

T. Toutain, A. G. Kosovichev

Comments: to be published in Astrophys.J. Letters

Subjects: Astrophysics (astro-ph)

[153] arXiv:astro-ph/0004154 [pdf, other]

Title: A Uniform Analysis of the Ly-alpha forest at z = 0 - 5: I. The sample and distribution of clouds at z > 1.7

J. Scott, J. Bechtold (Steward Obs., Univ. of Arizona), A. Dobrzycki (CfA)

Comments: minor corrections to text, 37 Latex pages, 11 encapsulated Postscript figures, uses this http URL, To appear in the Sept. 2000 ApJS, line lists and spectra available at this http URL

Journal-ref: Astrophys.J.Suppl. 130 (2000) 37-66

Subjects: Astrophysics (astro-ph)

[154] arXiv:astro-ph/0004155 [pdf, other]

Title: A Uniform Analysis of the Ly-alpha forest at z = 0 - 5: II. Measuring the mean intensity of the extragalactic ionizing background using the proximity effect

J. Scott, J. Bechtold (Steward Obs., Univ. of Arizona), A. Dobrzycki (CfA), V. Kulkarni (Clemson Univ.)

Comments: revised figures 13 and 14, and other minor corrections, 42 Latex pages, 23 encapsulated Postscript figures, uses this http URL, To appear in the Sept. 2000 ApJS

Journal-ref: Astrophys.J.Suppl. 130 (2000) 67-90

Subjects: Astrophysics (astro-ph)

[155] arXiv:astro-ph/0004156 [pdf, other]

Title: Quintessence and Gravitational Waves

Alain Riazuelo, Jean-Philippe Uzan

Comments: 21 pages, 18 figures, fianl version, accepted for publication in PRD

Journal-ref: Phys.Rev. D62 (2000) 083506

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc)

[156] arXiv:astro-ph/0004157 [pdf, other]

Title: Abundances of light elements in metal-poor stars. IV. [Fe/O] and [Fe/Mg] and the history of star formation in the solar neighborhood

Raffaele Gratton (1), Eugenio Carretta (1), Francesca Matteucci (2), Chris Sneden (3) ((1) Osservatorio Astronomico di Padova, ITALY, (2) SISSA, Trieste, ITALY, (3) University of Texas at Austin and McDonald Observatory, USA)

Comments: 13 pages, 9 encapsulated figures. LaTeX, uses this http URL. Accepted for publication in Astronomy & Astrophysics

Subjects: Astrophysics (astro-ph)

[157] arXiv:astro-ph/0004158 [pdf, other]

Title: Vertical structure of the accreting two-temperature corona and the transition to an ADAF

A. Różańska, B. Czerny (Copernicus Astrononmical Center, Poland)

Comments: 19 pages, 17 figures, accepted for publication in A&A

Subjects: Astrophysics (astro-ph)

[158] arXiv:astro-ph/0004159 [pdf, other]

Title: Smoothed Particle Hydrodynamics Simulations of Apsidal and Nodal Superhumps

Matt A. Wood, Michele M. Montgomery, James C. Simpson

Comments: 11 pages. Accepted for publication in The ApJ Letters

Subjects: Astrophysics (astro-ph)

[159] arXiv:astro-ph/0004160 [pdf, other]

Title: Gas properties of HII and Starburst galaxies: relation with the stellar population

D. Raimann (IF-UFRGS, Brazil), T. Storchi-Bergmann (IF-UFRGS, Brazil), E. Bica (IF-UFRGS, Brazil), J. Melnick (ESO), H. Schmitt (Space Telescope Institute)

Comments: 11 pages, 11 figures, MNRAS in press

Journal-ref: Mon.Not.Roy.Astron.Soc.316:559,2000

Subjects: Astrophysics (astro-ph)

[160] arXiv:astro-ph/0004161 [pdf, other]

Title: Infrared observations of gravitational lensing in Abell 2219 with CIRSI

Meghan E. Gray, Richard S. Ellis, Alexandre Refregier, Jocelyn Bezecourt, Richard G. McMahon, Martin G. Beckett, Craig D. Mackay, Michael D. Hoenig

Comments: 12 pages, 12 figures. Accepted for publication in MNRAS, minor changes

Journal-ref: Mon.Not.Roy.Astron.Soc. 318 (2000) 573

Subjects: Astrophysics (astro-ph)

[161] arXiv:astro-ph/0004162 [pdf, other]

Title: The Hamburg/ESO survey for bright QSOs. III. A large flux-limited sample of QSOs

L. Wisotzki, N. Christlieb, N. Bade, V. Beckmann, T. Koehler, C. Vanelle, D. Reimers

Comments: 12 pages, accepted by A&A

Subjects: Astrophysics (astro-ph)

[162] arXiv:astro-ph/0004163 [pdf, other]

Title: Fine Structure in the Energy Spectrum of Cosmic Ray Protons at 50 GeV ?

A. D. Erlykin (1,3), S. J. Fatemi (2,3), A. W. Wolfendale (3) ((1) P.N. Lebedev Physical Institute, Moscow, Russia, (2) Physics Department, University of Kerman, Iran, (3) Physics Department, University of Durham, UK)

Comments: submitted to Phys.Lett.B, 8 pages, 2 figs, LaTex2e

Journal-ref: Phys.Lett. B482 (2000) 337-342

Subjects: Astrophysics (astro-ph)

[163] arXiv:astro-ph/0004164 [pdf, other]

Title: Transient Gamma Ray Spectrometer Measurements of Gamma-Ray Lines from Novae. I. Limits on the Positron Annihilation Line in Five Individual Novae

M.J. Harris (1 and 2), J.E. Naya (1 and 2), B.J. Teegarden (2), T.L. Cline (2), N. Gehrels (2), D.M. Palmer (1 and 2), R. Ramaty (2), H. Seifert (1 and 2) ((1) USRA, (2) NASA/GSFC)

Comments: 27 pp. + 10 figs., or offprint mailed by request to harris@tgrs2.this http URL

Journal-ref: Ap. J. Vol. 522, p. 424 (1999)

Subjects: Astrophysics (astro-ph)

[164] arXiv:astro-ph/0004165 [pdf, other]

Title: On the Role of Irradiation and Evaporation in Strongly Irradiated Accretion Disks in the Black Hole X-ray Binaries: Toward an Understanding of FREDs and Secondary Maxima

J. K. Cannizzo

Comments: 15 pages with 3 figures; ApJ Letters, 1 May 2000

Subjects: Astrophysics (astro-ph)

[165] arXiv:astro-ph/0004166 [pdf, other]

Title: Cosmic Ray Acceleration in Superbubbles and the Composition of Cosmic Rays

R. E. Lingenfelter, J. C. Higdon, R. Ramaty

Comments: latex 8 pages, to appear in Proc. ACE-2000 Symp., AIP Conf. Proc

Subjects: Astrophysics (astro-ph)

[166] arXiv:astro-ph/0004167 [pdf, other]

Title: Transient Gamma Ray Spectrometer Measurements of Gamma-Ray Lines from Novae. II. Constraining the Galactic Nova Rate from a Survey of the Southern Sky during 1995-1997

M.J. Harris (1 and 2), B.J. Teegarden (2), T.L. Cline (2), N. Gehrels (2), D.M. Palmer (1 and 2), R. Ramaty (2), H. Seifert (1 and 2) ((1) USRA, (2) NASA/GSFC)

Comments: 22 pp. + 3 figs

Journal-ref: Ap.J. Vol. 547, p.1057 (2000)

Subjects: Astrophysics (astro-ph)

[167] arXiv:astro-ph/0004168 [pdf, other]

Title: Temperature Profiles of Accretion Disks around Rapidly Rotating Neutron Stars in General Relativity and Implications for Cygnus X-2

S. Bhattacharyya, A.V. Thampan, R. Misra, B. Datta

Comments: 18 pages, 9 figs., 2 tables, uses this http URL and this http URL. Submitted to ApJ

Journal-ref: ApJ, 542, 473

Subjects: Astrophysics (astro-ph)

[168] arXiv:astro-ph/0004169 [pdf, other]

Title: TGRS Observations of Positron Annihilation in Classical Novae

M.J. Harris (1 and 2), D.M. Palmer (1 and 2), J.E. Naya (1 and 2), B.J. Teegarden (2), T.L. Cline (2), N. Gehrels (2), R. Ramaty (2), H. Seifert (1 and 2)

Comments: 5 pp. inc. 3 figs. Proc. 5th Compton Symposium (AIP Conf. Series), ed. M. McConnell, in press

Subjects: Astrophysics (astro-ph)

[169] arXiv:astro-ph/0004170 [pdf, other]

Title: Extremely Red Objects from the NICMOS/HST Parallel Imaging Survey

Lin Yan (The Carnegie Observatories; OCIW), P.J. McCarthy, R.J. Weymann (OCIW), M.A. Malkan (UCLA), H.I.Teplitz (Goddard), L.J. Storrie-Lombardi (SIRTF), M.Smith (CTIO), A. Dressler (OCIW)

Comments: To appear in the AJ August issue. Replaced with the published version

Subjects: Astrophysics (astro-ph)

[170] arXiv:astro-ph/0004171 [pdf, other]

Title: Resolving SNR 0540-6944 from LMC X-1 with Chandra

Rosa Murphy Williams, Robert Petre, You-Hua Chu, C.-H. Rosie Chen

Comments: 8 pages, 2 GIF figures. Submitted to ApJL. Replaced with minor revisions from referee comments

Journal-ref: Astrophys.J. 536 (2000) L27-L30

Subjects: Astrophysics (astro-ph)

[171] arXiv:astro-ph/0004172 [pdf, other]

Title: Multifrequency studies of Gamma-Ray bursts: towards the understanding of the mystery

Alberto J. Castro-Tirado (LAEFF-INTA, Madrid, and IAA-CSIC, Granada, Spain)

Comments: Invited review to be published in "Multifrequency studies of high energy sources", Eds.: Giovanelli, F. and Sabau-Graziati, L., Proceedings of a Workhop hold in Vulcano, Italy, in May 1999. (10 pages with postscript figures included)

Subjects: Astrophysics (astro-ph)

[172] arXiv:astro-ph/0004173 [pdf, other]

Title: The Multiply Scattering Effect on the Energy Measurement of UHE Cosmic Rays using Atmospheric Fluorescence Technique

Xingzhi Zhang (Department of Physics, Columbia University)

Comments: 17 pages, 17 figures, submitted t astr. part. phys

Subjects: Astrophysics (astro-ph)

[173] arXiv:astro-ph/0004174 [pdf, other]

Title: Membership and Multiplicity among Very Low-Mass Stars and Brown Dwarfs in the Pleiades Cluster

E. L. Martin, W. Brandner, J. Bouvier, K. L. Luhman, J. Stauffer, G. Basri, M. R. Zapatero Osorio

Comments: to be published in The Astrophysical Journal

Journal-ref: Astrophys.J.543:299-312,2000

Subjects: Astrophysics (astro-ph)

[174] arXiv:astro-ph/0004175 [pdf, other]

Title: Detection of a Far IR Excess with DIRBE at 60 and 100 Microns

Douglas P. Finkbeiner, Marc Davis, David J. Schlegel

Comments: 43 pages, 9 figures, submitted to ApJ

Journal-ref: Astrophys.J.544:81-97,2000

Subjects: Astrophysics (astro-ph)

[175] arXiv:astro-ph/0004176 [pdf, other]

Title: Redshifts For 220 BATSE Gamma-Ray Bursts Determined by Variability and the Cosmological Consequences

E. E. Fenimore (Los Alamos), E. Ramirez-Ruiz (Los Alamos, Cambridge University)

Comments: Various calculations revised, resulting in burst formation rate that continues to increase until z = 10, 33 pages, 12 embedded figures, 2 tables, Latex, Submitted to ApJ Report No. LA-UR 00-1791

Subjects: Astrophysics (astro-ph)

[176] arXiv:astro-ph/0004177 [pdf, other]

Title: The Chandra X-Ray Observatory's Radiation Environment and the AP-8/AE-8 Model

Shanil N. Virani (1), Reinhold Mueller-Mellin (2), Paul P. Plucinsky (1), Yousaf M. Butt (1) ((1) Harvard-Smithsonian Center for Astrophysics, (2) Extraterrestriche Physik, IEAP, Universitat Kiel)

Comments: 12 pgs, 6 figs, for SPIE 4012 (Paper 76)

Subjects: Astrophysics (astro-ph); Geophysics (physics.geo-ph); Space Physics (physics.space-ph)

[177] arXiv:astro-ph/0004178 [pdf, other]

Title: Multiparameter estimation with the Pseudo-C_l method

Benjamin D. Wandelt (Princeton), Krzysztof M. Gorski (Warsaw), Eric Hivon (Caltech)

Comments: 4 pages, 2 colour figures. Talk presented at "Energy Densities in the Universe", XXXVth Rencontres de Moriond, France (January 22-29, 2000)

Subjects: Astrophysics (astro-ph)

[178] arXiv:astro-ph/0004179 [pdf, other]

Title: Fluctuations in Isothermal Spheres

Joseph Katz (1), Isao Okamoto (2) ((1) Hebrew University, Jerusalem, (2) NAO, Mitaka, Tokyo)

Comments: 21 pages, 2 figures, to be published in MNRAS. Paper replaced with minor grammatical alterations

Journal-ref: Mon.Not.Roy.Astron.Soc. 317 (2000) 163

Subjects: Astrophysics (astro-ph)

[179] arXiv:astro-ph/0004180 [pdf, other]

Title: BeppoSAX observation of Cen X-4 in quiescence

Sergio Campana (Oss. astr. Brera, Merate), Luigi Stella (Oss. astr. Roma), Sandro Mereghetti, Davide Cremonesi (IFCTR-CNR, Milano)

Comments: Accepted for publication in A&A main journal - 5 pages (including 2 PS figure)

Subjects: Astrophysics (astro-ph)

[180] arXiv:astro-ph/0004181 [pdf, other]

Title: On the Poynting-Robertson Effect and Analytical Solutions

Jozef Klacka

Subjects: Astrophysics (astro-ph)

[181] arXiv:astro-ph/0004182 [pdf, other]

Title: Cold dust in the starburst galaxy M82

G. Thuma, N. Neininger, U. Klein, R. Wielebinski

Comments: 8 pages, 7 figures (EPS). LaTeX, uses this http URL and this http URL. Accepted for publication in A&A

Journal-ref: A&A 358, 65, 2000

Subjects: Astrophysics (astro-ph)

[182] arXiv:astro-ph/0004183 [pdf, other]

Title: Bulk viscosity in superfluid neutron star cores. I. Direct Urca processes in npe\mu matter

P. Haensel (1), K.P. Levenfish (2), D.G. Yakovlev (2) ((1) N. Copernicus Astronomical Center, Warsaw, Poland (2) Ioffe Physical Technical Institute, St. Petersburg, Russia)

Comments: 14 pages, 7 figures, latex, uses this http URL, to be published in Astronomy and Astrophysics

Journal-ref: Astron.Astrophys.357:1157-1169,2000

Subjects: Astrophysics (astro-ph)

[183] arXiv:astro-ph/0004184 [pdf, other]

Title: GI2T/REGAIN spectro-interferometry with a new infrared beam combiner

G. Weigelt (1), D. Mourard (2), L. Abe (2), U. Beckmann (1), O. Chesneau (2), C. Hillemanns (1), K.-H. Hofmanni (1), S. Raglandi (2), D. Schertl (1), M. Scholz (3), P. Stee (2), N. Thureau (2), F. Vakili (2) ((1) MPI fuer Radioastronomie Bonn; (2) Observatoire de la Cote d'Azur; (3) Institut fuer Theoretische Astrophysik, Heidelberg)

Comments: 10 pages, 6 figures, see also this http URL, SPIE conf 4006 "Interferometry in Optical Astronomy", in press

Subjects: Astrophysics (astro-ph)

[184] arXiv:astro-ph/0004185 [pdf, other]

Title: Cooling neutron stars with localized protons

D.A. Baiko (1)P. Haensel (2) ((1) Ioffe Physical Technical Institute, St. Petersburg, Russia; (2) N. Copernicus Astronomical Center, Warsaw, Poland)

Comments: 5 pages, 3 figures, latex, uses this http URL, to be published in Astronomy and Astrophysics

Subjects: Astrophysics (astro-ph)

[185] arXiv:astro-ph/0004186 [pdf, other]

Title: Unusually rapid variability of the GRB000301C optical afterglow

N. Masetti, et al

Comments: 5 pages, Latex, 2 PostScript figures, references added, accepted by Astronomy and Astrophysics Letters

Subjects: Astrophysics (astro-ph)

[186] arXiv:astro-ph/0004187 [pdf, other]

Title: The Mass of the Andromeda Galaxy

N.W. Evans (Oxford), M.I. Wilkinson (Cambridge)

Comments: 16 pages, 8 figures, MNRAS, in press

Journal-ref: Mon.Not.Roy.Astron.Soc.316:929,2000

Subjects: Astrophysics (astro-ph)

[187] arXiv:astro-ph/0004188 [pdf, other]

Title: X-ray Spectral Diagnostics of Gamma-Ray Burst Environments

Frits Paerels, Erik Kuulkers, John Heise, Duane A. Liedahl

Comments: 11 pages, 2 figures, accepted for publication in ApJ Letters

Subjects: Astrophysics (astro-ph)

[188] arXiv:astro-ph/0004189 [pdf, other]

Title: Local Group Dwarf Galaxies and the Star Formation Law at High Redshift

Nickolay Y. Gnedin

Comments: accepted for publication in ApJ Letters

Subjects: Astrophysics (astro-ph)

[189] arXiv:astro-ph/0004190 [pdf, other]

Title: Interferometric measurement of resonance transition wavelengths in C IV, Si IV, Al III, Al II, and Si II

Ulf Griesmann, Rainer Kling

Comments: 6 pages, 2 figures, 1 table

Subjects: Astrophysics (astro-ph)

[190] arXiv:astro-ph/0004191 [pdf, other]

Title: On the Emergence and Discovery of Hot Spots in Supernova Remnant 1987A

Stephen Lawrence (1), Ben Sugerman (1), Patrice Bouchet (2), Arlin Crotts (1), Robert Uglesich (1), Steve Heathcote (2) ((1) Columbia University, (2) CTIO)

Comments: 12 pages, 2 figures; AASTeX v5.0 LaTeX 2e macros; submitted to the Astrophysical Journal Letters on 2000 April 5; includes another epoch of HST imaging; revisions to table and figures; added text on dection criteria

Subjects: Astrophysics (astro-ph)

[191] arXiv:astro-ph/0004192 [pdf, other]

Title: DIRBE Minus 2MASS: Confirming the Cosmic Infrared Background at 2.2 Microns

E. L. Wright (UCLA)

Comments: ApJ in press. 14 pages Latex with 7 included figures. accepted version with 1 new figure

Subjects: Astrophysics (astro-ph)

[192] arXiv:astro-ph/0004193 [pdf, other]

Title: Apse Alignment of Narrow Eccentric Planetary Rings

E. I. Chiang, P. Goldreich (California Institute of Technology)

Comments: Accepted to ApJ

Subjects: Astrophysics (astro-ph)

[193] arXiv:astro-ph/0004194 [pdf, other]

Title: Large-Scale Regular Morphological Patterns in the Radio Jet of NGC 6251

H. Sudou, Y. Taniguchi (Tohoku university, Japan)

Comments: 8 figures, 15 pages, accepted for publication in AJ

Subjects: Astrophysics (astro-ph)

[194] arXiv:astro-ph/0004195 [pdf, other]

Title: Hybrid Thermal-Nonthermal Synchrotron Emission from Hot Accretion Flows

Feryal Ozel, Dimitrios Psaltis, Ramesh Narayan (Harvard-Smithsonian Center for Astrophysics)

Comments: 33 pages with figures, to appear in the Astrophysical Journal

Subjects: Astrophysics (astro-ph)

[195] arXiv:astro-ph/0004196 [pdf, other]

Title: Observational constraints upon quintessence models arising from moduli fields

S.C.C. Ng

Comments: 6 pages, RevTeX, 9 figures, corrected some typos, accepted for publication in Phys. Lett. B

Journal-ref: Phys.Lett. B485 (2000) 1-8

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)

[196] arXiv:astro-ph/0004197 [pdf, other]

Title: Possible evidence for the disk origin for the powering of jets in Sgr A* and nearby elliptical galaxies

Feng Yuan (Nanjing University)

Comments: 8 pages, 5 figures, uses this http URL, accepted by MNRAS

Journal-ref: Mon.Not.Roy.Astron.Soc. 319 (2000) 1178

Subjects: Astrophysics (astro-ph)

[197] arXiv:astro-ph/0004198 [pdf, other]

Title: Limits on the optical magnitude of PSR 1821-24 in M28

F. K. Sutaria (IUCAA, Pune, India)

Comments: Two pages, two figures, in press. Please email any questions/comments to fks@iucaa.this http URL

Journal-ref: Pulsar Astronomy - 2000 and Beyond, ASP Conference Series, Vol. 202; Proceedings of the 177th Colloquium of the IAU held in Bonn, Germany, 30 August - 3 September 1999. (San Francisco: ASP). Edited by M. Kramer, N. Wex, and N. Wielebinski, p. 313

Subjects: Astrophysics (astro-ph)

[198] arXiv:astro-ph/0004199 [pdf, other]

Title: A TiO study of the dwarf nova IP Pegasi

G. Beekman, M. Somers, T. Naylor, C. Hellier

Comments: Accepted for publication in MNRAS. 10 pages and 10 figures

Journal-ref: Mon.Not.Roy.Astron.Soc. 318 (2000) 9

Subjects: Astrophysics (astro-ph)

[199] arXiv:astro-ph/0004200 [pdf, other]

Title: Source Reconstruction as an Inverse Problem

Norman Gray (1), Iain J. Coleman (2) ((1) University of Glasgow, (2) British Antarctic Survey)

Comments: 8 pages, 3 figures. To be published in "Microlensing 2000, A New Era of Microlensing Astrophysics", eds., J.W. Menzies and P.D. Sackett, ASP Conference Series

Subjects: Astrophysics (astro-ph)

[200] arXiv:astro-ph/0004201 [pdf, other]

Title: The Parameter Space Occupied by Galaxies: The Optical Window

Simon P. Driver, Nicholas Cross (University of St Andrews)

Comments: Review contribution for Mapping the Hidden Universe (Eds Kraan Korteweg, Henning and Andernach)

Subjects: Astrophysics (astro-ph)