Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Hester, J. Jeff"'
Autor:
Krist, John E., Stapelfeldt, Karl. R., Hester, J. Jeff, Healy, Kevin, Dwyer, Steven J., Gardner, Carl L.
We present nine epochs of Hubble Space Telescope optical imaging of the bipolar outflow from the pre-main sequence binary XZ Tauri. Our data monitors the system from 1995-2005 and includes emission line images of the flow. The northern lobe appears t
Externí odkaz:
http://arxiv.org/abs/0809.2073
Publikováno v:
Astrophys.J.700:506-522,2009
We present new Spitzer Space Telescope observations of the region NGC 2467, and use these observations to determine how the environment of an HII region affects the process of star formation. Our observations comprise IRAC (3.6, 4.5, 5.8, and 8.0 um)
Externí odkaz:
http://arxiv.org/abs/0711.1515
Autor:
Hester, J. Jeff, Desch, Steven J.
Recent analysis of the decay products of short-lived radiounclides (SLRs) in meteorites, in particular the confirmation of the presence of live 60Fe in the early Solar System, provides unambiguous evidence that the Sun and Solar System formed near a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506190
Publikováno v:
Astrophys.J. 610 (2004) 835
We present a search for water maser emission at 22 GHz associated with young low-mass protostars in six HII regions -- M16, M20, NGC 2264, NGC 6357, S125, and S140. The survey was conducted with the NRAO Very Large Array from 2000 to 2002. For severa
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404369
Publikováno v:
Astrophys.J.570:749-757,2002
M16=NGC 6611, the Eagle Nebula, is a well studied region of star formation and the source of a widely recognized Hubble Space Telescope (HST) image. High spatial resolution infrared observations with the Near Infrared Camera and Multi-Object Spectrom
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201292
Autor:
Weisskopf, Martin C., Hester, J. Jeff, Tennant, Allyn F., Elsner, Ronald F., Schulz, Norbert S., Marshall, Herman L., Karovska, Margarita, Nichols, Joy S., Swartz, Douglas A., Kolodziejczak, Jeffery J., O'Dell, Stephen L.
The Chandra X-ray Observatory observed the Crab Nebula and Pulsar during orbital calibration. Zeroth-order images with the High-Energy Transmission Grating (HETG) read-out by the Advanced CCD Imaging Spectrometer spectroscopy array (ACIS-S) show a st
Externí odkaz:
http://arxiv.org/abs/astro-ph/0003216
We present Hubble Space Telescope WFPC2 images of a portion of the bright northeast rim of NGC 6888, the nebular shell physically associated with the Wolf-Rayet star HD 192163. The exposures are taken in the light of Halpha 6563, [O III] 5007, and [S
Externí odkaz:
http://arxiv.org/abs/astro-ph/0003053
Autor:
Sankrit, Ravi, Hester, J. Jeff
We present a grid of photoionization models for the emission from photoevaporative interfaces between the ionized gas and molecular cloud in blister HII regions. For the density profiles of the emitting gas in the models, we use a general power law f
Externí odkaz:
http://arxiv.org/abs/astro-ph/0001358
Autor:
Matthews, Lynn D., Gallagher, III, John S., Krist, John E., Watson, Alan M., Burrows, Christopher J., Griffiths, Richard E., Hester, J. Jeff, Trauger, John T., Ballester, Gilda E., Clarke, John T., Crisp, David, Evans, Robin W., Hoessel, John G., Holtzman, Jon A., Mould, Jeremy R., Scowen, Paul A., Stapelfeldt, Karl R., Westphal, James A.
We have used the Wide Field Planetary Camera 2 aboard the Hubble Space Telescope to image the compact star cluster nuclei of the nearby, late-type, low-luminosity spiral galaxies NGC 4395, NGC 4242, and ESO 359-029. We also analyze archival WFPC2 obs
Externí odkaz:
http://arxiv.org/abs/astro-ph/9904205
Autor:
Geha, Marla C., Holtzman, Jon A., Mould, Jeremy R., Gallagher III, John S., Watson, Alan M., Cole, Andrew A., Grillmair, Carl J., Stapelfeldt, Karl R., Ballester, Gilda E., Burrows, Christopher J., Clarke, John T., Crisp, David, Evans, Robin W., Griffiths, Richard E., Hester, J. Jeff, Hoessel, John G., Scowen, Paul A., Trauger, John T., Westphal, James A.
Publikováno v:
Astron.J.115:1045-1056,1998
We present HST photometry for three fields in the outer disk of the LMC extending approximately four magnitudes below the faintest main sequence turnoff. We cannot detect any strongly significant differences in the stellar populations of the three fi
Externí odkaz:
http://arxiv.org/abs/astro-ph/9711144