G. Hartig

Space Telescope Science Institute

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Co-Authors

H. C. Ford

Johns Hopkins University

G. D. Illingworth

University of California, Santa Cruz

Randy A. Kimble

Goddard Space Flight Center

Mark Clampin

Goddard Space Flight Center

D. A. Golimowski

Space Telescope Science Institute

A. R. Martel

Space Telescope Science Institute

M. Sirianni

Space Telescope Science Institute

Z. Tsvetanov

Hamad bin Khalifa University

John Krist

Jet Propulsion Laboratory

F. Bartko

ACS Solutions (United States)

Cooperative Institutions

Space Telescope Science Institute

754

Goddard Space Flight Center

495

Johns Hopkins University

193

Northrop Grumman (United States)

153

University of Arizona

100

California Institute of Technology

Michigan Science Center

University of California, Berkeley

Max Planck Institute for Astronomy

European Space Agency

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Dust and Ionized Gas in Nine Nearby Early-Type Galaxies Imaged with theHubble Space TelescopeAdvanced Camera for Surveys

The Astronomical Journal (2004)

A. R. Martel H. C. Ford Larry Bradley H. D. Tran F. Menanteau

We present V and I continuum images and Hα+[N II] maps of nine early-type galaxies observed with the Wide Field Channel of the Advanced Camera for Surveys on the Hubble Space Telescope. Dust and ionized gas are detected in all galaxies. The optical nebulae are primarily concentrated on the nuclei and extend out to radii of a few hundred parsecs in compact clumps, filaments, or disks. Two galaxies, NGC 6166 and NGC 6338, also possess diffuse, ionized filaments on kiloparsec scales. The ionized gas is entirely contained within the nuclear disks of ESO 208-G021, NGC 3078, and NGC 7720. In the radio-loud galaxy NGC 6166, emission-line filaments are detected along the radio lobes, possibly as a result of shock ionization. A wide range of ionized gas masses, Mg ≈ 7 × 102–3 × 106 M⊙, are calculated from the observed fluxes. Even in this small sample, the orientation of the ionized material correlates well with the major or minor axis of the galaxies, consistent with an external origin for the dust and gas.

Hubble sequence

Doubly ionized oxygen

10.1086/425628

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Citations (43)

In-flight Performance of the Advanced Camera for Surveys CCDs

Experimental Astronomy (2002)

Mark Clampin M. Sirianni G. Hartig H. C. Ford G. D. Illingworth

10.1023/b:expa.0000004358.00269.51

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Citations (4)

Flats: Preliminary WFC Data and Plans for Flight Flats

Applied Categorical Structures (2000)

R. C. Bohlin G. Hartig Z. Tsvetanov

Monochromatic color

Tracking (education)

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VizieR Online Data Catalog: VV29 and NGC 4676 HST photometry (Benitez+, 2004)

VizieR Online Data Catalog (2004)

N. Benı́tez H. A. Ford R. J. Bouwens F. Menanteau John P. Blakeslee

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The Cosmic Origins Spectrograph: on-orbit instrument performance

Springer eBooks (2011)

Steve Osterman J. Green Cynthia S. Froning S. Béland Eric B. Burgh

Orbit (dynamics)

10.1007/978-94-007-2573-7_37

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Citations (1)

A large population of ‘Lyman-break’ galaxies in a protocluster at redshift z ≈ 4.1

Nature (2003)

G. K. Miley Roderik Overzier Z. Tsvetanov R. J. Bouwens N. Benı́tez

10.1038/nature02125

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Citations (113)

WFC3 Thermal Vacuum Testing: IR Grism Focus and Tilt Anomalies

wfc (2005)

H. Bushouse G. Hartig

The WFC3 thermal-vacuum testing performed in the Fall of 2004 has revealed anomalies concerning the two grisms installed in the IR channel of the instrument. First, the grisms do not produce in-focus images, the cause of which has been traced to a 90 degree rotation error in the way the grisms were mounted in the filter wheel. Second, both grisms show a residual tilt of their dispersion axes relative to the detector axes of ~8.3 degrees, which is far larger than what would be expected from random uncertainties in their mounting.

Grism

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Discovery of Two Distant Type Ia Supernovae in the Hubble Deep Field–North with the Advanced Camera for Surveys

The Astrophysical Journal (2003)

John P. Blakeslee Z. Tsvetanov Adam G. Riess H. C. Ford G. D. Illingworth

We present observations of the first two supernovae discovered with the recently installed Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). The supernovae were found in Wide Field Camera images of the Hubble Deep Field-North taken with the F775W, F850LP, and G800L optical elements as part of the ACS guaranteed time observation program. Spectra extracted from the ACS G800L grism exposures confirm that the objects are Type Ia supernovae (SNe Ia) at redshifts z = 0.47 and 0.95. Follow-up HST observations have been conducted with ACS in F775W and F850LP and with the Near-Infrared Camera and Multi-Object Spectrometer in the near-infrared F110W bandpass, yielding a total of nine flux measurements in the three bandpasses over a period of 50 days in the observed frame. We discuss many of the important issues in doing accurate photometry with the ACS. We analyze the multiband light curves using two different fitting methods to calibrate the supernova luminosities and place them on the SNe Ia Hubble diagram. The resulting distances are consistent with the redshift-distance relation of the accelerating universe model, although evolving intergalactic gray dust remains as a less likely possibility. The relative ease with which these SNe Ia were found, confirmed, and monitored demonstrates the potential ACS holds for revolutionizing the field of high-redshift SNe Ia and therefore of testing the accelerating universe cosmology and constraining the "epoch of deceleration."

Grism

10.1086/374797

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Citations (57)

WFC3 Cycle 17 Calibration Program

wfc (2009)

Susana E. Deustua S. Baggett T. Borders T. M. Brown H. Bushouse

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WFC3 IR Image Quality

HST Proposal (2009)