Science Archives Publication System

The Nature of Blue Early-Type Galaxies in the GOODS Fields

DOI: 10.1086/507121 Bibcode: 2006ApJ...650..148L

Lee, Myung Gyoon; Hwang, Ho Seong; Lee, Joon Hyeop

We present a study of the nature of the blue early-type galaxies (BEGs) in the GOODS North and South fields using the GOODS archival HST ACS data. Using visual inspection, we have selected 58 BEGs and 113 normal red early-type galaxies (REGs) in the sample of 1949 galaxies with spectroscopic redshifts. We find that the BEGs are generally bluer, fa…

2006 • The Astrophysical Journal

eHST 31

INTEGRAL observations of the Crab pulsar

DOI: 10.1051/0004-6361:20054305 Bibcode: 2006A&A...450..617M

Cusumano, G.; Foschini, L.; Di Cocco, G. +5 more

Aims.The paper presents the timing and spectral analysis of several observations of the Crab pulsar performed with INTEGRAL in the energy range 3-500 keV.
Methods: .All these observations, when summed together provide a high statistics data set which can be used for accurate phase resolved spectroscopy. A detailed study of …

2006 • Astronomy and Astrophysics

INTEGRAL 31

X-ray emission from the blazar AO 0235+16: the XMM-Newton and Chandra point of view

DOI: 10.1051/0004-6361:20054409 Bibcode: 2006A&A...452..845R

Villata, M.; Orio, M.; Raiteri, C. M. +4 more

We analyse five observations of the BL Lac object AO 0235+16 performed with the Chandra and XMM-Newton satellites during the years 2000-2005. In the February 2002 observation the source is found in a bright state and presents a steep X-ray spectrum, while in all the other epochs it is faint and the spectrum is hard. The soft X-r…

2006 • Astronomy and Astrophysics

XMM-Newton 31

Failed disc winds: a physical origin for the soft X-ray excess?

DOI: 10.1111/j.1365-2966.2006.10645.x Bibcode: 2006MNRAS.371...81S

Schurch, N. J.; Done, C.

The origin of the soft X-ray excess emission observed in many type-1 active galactic nuclei (AGN) has been an unresolved problem in X-ray astronomy for over two decades. We develop the model proposed by Gierliński & Done, which models the soft excess with heavily smeared, ionized, absorption, by including the emission that must be associated w…

2006 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 31

An XMM-Newton observation of the massive edge-on Sb galaxy NGC 2613

DOI: 10.1111/j.1365-2966.2006.10682.x Bibcode: 2006MNRAS.371..147L

Wang, Q. D.; Li, Z.; Irwin, J. A. +1 more

We present an XMM-Newton observation of the massive edge-on Sb galaxy NGC 2613. We discover that this galaxy contains a deeply embedded active nucleus with a 0.3-10 keV luminosity of 3.3 × 10⁴⁰ergs^-1 and a line-of-sight absorption column of 1.2 × 10²³cm^-2. Within the 25 magarcsec^-2 optical B-b…

2006 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 31

NGC 4435: a bulge-dominated galaxy with an unforeseen low-mass central black hole

DOI: 10.1111/j.1365-2966.2005.09901.x Bibcode: 2006MNRAS.366.1050C

Dalla Bontà, E.; Corsini, E. M.; Pizzella, A. +3 more

We present the ionized gas kinematics of the SB0 galaxy NGC 4435 from spectra obtained with the Space Telescope Imaging Spectrograph. This galaxy has been selected on the basis of its ground-based spectroscopy, for displaying a position-velocity diagram consistent with the presence of a circumnuclear Keplerian disc rotating around a supermassive b…

2006 • Monthly Notices of the Royal Astronomical Society

eHST 31

Chandra Observations of the Transient 7 s X-ray Pulsar AX J1845.0-0258

DOI: 10.1086/507262 Bibcode: 2006ApJ...652..548T

Gotthelf, E. V.; Gaensler, B. M.; Kaspi, V. M. +1 more

We present the results of Chandra X-Ray Observatory observations of the transient anomalous X-ray pulsar candidate AX J1845.0-0258 in apparent quiescence. Within the source's error circle, we find a point source and possible counterpart, which we designate CXOU J184454.6-025653. No coherent pulsations are detected, and no extended emission is seen…

2006 • The Astrophysical Journal

XMM-Newton 31

Observations of non-LTE emission at 4 5 microns with the planetary Fourier spectrometer abord the Mars Express mission

DOI: 10.1016/j.icarus.2005.12.022 Bibcode: 2006Icar..182...51F

Lopez-Valverde, M. A.; D'Aversa, E.; Formisano, V. +2 more

We report on PFS-MEX (Planetary Fourier Spectrometer on board Mars Express) limb observations of the non-Local Thermodynamic Equilibrium emission by CO and CO ₂ isotopic molecules. The CO emission is observed peaking at altitudes lower than the CO ₂ emission peak. Two orbits have been considered, which explore latitudes from …

2006 • Icarus

MEx 30

High-Resolution Absorption Spectroscopy of Multiphase, High-Metallicity Gas Associated with the Luminous Quasar HE 0226-4110

DOI: 10.1086/504395 Bibcode: 2006ApJ...645..868G

Tripp, Todd M.; Sembach, Kenneth R.; Savage, Blair D. +2 more

We present FUSE and HST STIS observations of the absorption-line system near the emission redshift of the radio-quiet, X-ray-bright quasar HE 0226-4110 (z=0.495, V=15.2). The spectra cover the rest-frame wavelength range 610-1150 Å, and we detect a wide range of ionization species, including four adjacent stages of oxygen: O III-VI, which reveal a…

2006 • The Astrophysical Journal

eHST 30

Deep Imaging Surveys of Star-forming Clouds. IV. The Meek and the Mighty: Outflows from Young Stars in Chamaeleon I

DOI: 10.1086/507523 Bibcode: 2006AJ....132.1923B

Bally, John; Fazio, Giovanni; Walawender, Josh +1 more

We present a survey of shocks and outflows in the Chamaeleon I star-forming complex using Hα, [S II], and SDSS i' images obtained from the ground, an i' image obtained with the Hubble Space Telescope, and 4.5 µm images obtained with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We find new Herbig-Haro (HH) objects and exte…

2006 • The Astronomical Journal

eHST 30