Stefi A. Baum

A Multiwavelength Spectral and Polarimetric Study of the Jet of 3C 264 (2009)

Perlman, Eric S., Padgett, C. Alex, Georganopoulos, Markos, Worrall, Diana M., Kastner, Joel H., Franz, Geoffrey, ...

We present a comprehensive multiband spectral and polarimetric study of the jet of 3C 264 (NGC 3862). Included in this study are three HST optical and ultraviolet polarimetry data sets, along with...

Physical Properties of Very Powerful FRII Radio Galaxies (2008)

O'Dea, Christopher P., Daly, Ruth A., Kharb, Preeti, Freeman, Kenneth A., Baum, Stefi A.

We estimate ages and physical properties of powerful radio galaxies. An analysis of new multi-wavelength VLA observations of eleven very powerful classical double (FRIIb) radio galaxies with...

An Infrared Survey of Brightest Cluster Galaxies. II: Why are Some Brightest Cluster Galaxies Forming Stars? (2008)

O'Dea, Christopher P., Baum, Stefi A., Privon, George, Noel-Storr, Jacob, Quillen, Alice C., Zufelt, Nicholas, ...

Quillen et al.(2007) presented an imaging survey with the {\it Spitzer Space Telescope} of 62 brightest cluster galaxies with optical line emission located in the cores of X-ray luminous clusters....

An Infrared Survey of Brightest Cluster Galaxies. II: Why are Some Brightest Cluster Galaxies Forming Stars? (2008)

Christopher P. O’dea, Stefi A. Baum, George Privon, Jacob Noel-storr, Alice C. Quillen, Nicholas Zufelt, ...

Quillen et al.(2007) reported on an imaging survey with the Spitzer Space Telescope of 62 brightest cluster galaxies with optical line emission located in the cores of X-ray luminous clusters...

Kailash C. Sahu (2007)

Kailash C. Sahu, Richard Shaw, Mary Elizabeth Kaiser, Stefi A. Baum, Henry C, ...

The cluster RXJ 1347.5-1145, the most luminous cluster in the X-ray wavelengths, was imaged with the newly installed Space Telescope Imaging Spectrograph (STIS) on-board HST. Its relatively high...

1 (2007)

Christopher P. O'dea, Anton M. Koekemoer, Stefi A. Baum, William B. Sparks, Andre R, Mark G. Allen, ...

We present new HST STIS/MAMA near-UV images and archival WFPC2 V and R band images which reveal the presence of four star forming regions in an arc along the edge of the dust lane in the giant (4...

An infrared survey of brightest cluster galaxies: Paper I (2007)

Quillen, Alice C., Zufelt, Nicholas, Park, Jaehong, O'Dea, Christopher P., Baum, Stefi A., Privon, George, ...

We report on an imaging survey with the Spitzer Space Telescope of 62 brightest cluster galaxies with optical line emission. These galaxies are located in the cores of X-ray luminous clusters...

Infrared Emission from the Nearby Cool Core Cluster Abell 2597 (2007)

Donahue, Megan, Jordan, Andres, Baum, Stefi A., Cote, Patrick, Ferrarese, Laura, Goudfrooij, Paul, ...

We observed the brightest central galaxy (BCG) in the nearby (z=0.0821) cool core galaxy cluster Abell 2597 with the IRAC and MIPS instruments on board the Spitzer Space Telescope. The BCG was...

Optical Polarimetry of the Jets of Nearby Radio Galaxies: I. The Data (2006)

Perlman, Eric S., Padgett, C. A., Georganopoulos, Markos, Sparks, William B., Biretta, John A., O'Dea, Christopher P., ...

We present an overview of new HST imaging polarimetry of six nearby radio galaxies with optical jets. These observations triple the number of extragalactic jets with subarcsecond-resolution optical...

Spitzer IRS spectra of a large sample of Seyfert galaxies: a variety of infrared SEDs in the local AGN population (2006)

Buchanan, Catherine L., Gallimore, Jack F., O'Dea, Christopher P., Baum, Stefi A., Axon, David J., Robinson, Andrew, ...

We are conducting a large observing program with the Spitzer Space Telescope to determine the mid-to-far infrared spectral energy distributions of a well-defined sample of 87 nearby, 12...

Infrared SEDs of Seyfert Galaxies: Starbursts and the Nature of the Obscuring Medium (2006)

Buchanan, Catherine L., Gallimore, Jack F., O'Dea, Christopher P., Baum, Stefi A., Axon, David J., Robinson, Andrew, ...

We present the results of IRS low-resolution spectroscopy of 51 Seyfert galaxies, part of a large Spitzer observing program to determine the mid-to-far infrared spectral energy distributions of a...

Optical polarimetry of the jets of nearby radio galaxies. I. The data (2006)

Perlman, Eric S., Padgett, C. A., Georganopoulos, Markos, Sparks, William B., Biretta, John A., O'Dea, Christopher P., ...

We present an overview of new HST imaging polarimetry of six nearby radio galaxies with optical jets. These observations triple the number of extragalactic jets with subarcsecond-resolution optical...

The Warped Nuclear Disk of Radio Galaxy 3C 449 (2005)

Tremblay, Grant R., Quillen, Alice C., Floyd, David J. E., Noel-Storr, Jacob, Baum, Stefi A., Axon, David, ...

Among radio galaxies containing nuclear dust disks, the bipolar jet axis is generally observed to be perpendicular to the disk major axis. The FR I radio source 3C 449 is an outlier to this...

Two Clusters with Radio-quiet Cooling Cores (2005)

Donahue, Megan, Voit, G. Mark, O'Dea, Christopher P., Baum, Stefi A., Sparks, William B.

Radio lobes inflated by active galactic nuclei at the centers of clusters are a promising candidate for halting condensation in clusters with short central cooling times because they are common in...

Resolving the Shocks in Radio Galaxy Nebulae: HST and Radio Imaging of 3C 171, 3C277.3 and PKS2250-41 (2005)

Tilak, Avanti, O'Dea, Christopher P., Tadhunter, Clive, Willis, Karen, Morganti, Rafaella, Baum, Stefi A., ...

We present the results of HST/WFPC2 medium and narrow band imaging and VLA and MERLIN2 radio imaging of three powerful radio galaxies: 3C 171, 3C 277.3, and PKS 2250-41. We obtained images of the...

Millimeter Wave Observations of the Core-Jet and Molecular Gas in the FR I Radio Galaxy NGC 3801 (2005)

Das, Mousumi, Vogel, Stuart N., Kleijn, Gijs A. Verdoes, O'Dea, Christopher P., Baum, Stefi A.

We present BIMA 3 mm observations of the radio continuum source and the molecular gas disk in the radio loud Fanaroff & Riley Type I (FR I)galaxy NGC3801.We have detected a continuum source in the...

The Parsec-scale Radio Structure of NGC 1068 and the Nature of the Nuclear Radio Source (2004)

Gallimore, Jack F., Baum, Stefi A., O'Dea, Christopher P.

We present sensitive, multifrequency Very Long Baseline Array (VLBA) images of the nuclear radio sources of NGC 1068. At 5 GHz and 8.4 GHz, the radio continuum source S1, argued to mark the location...

STIS spectroscopy of the emission line gas in the nuclei of nearby FR-I galaxies (2003)

Noel-Storr, Jacob, Baum, Stefi A., Kleijn, Gijs Verdoes, Van Der Marel, Roeland P., O'Dea, Christopher P., De Zeeuw, P. Tim, ...

We present the results of the analysis of a set of medium resolution spectra, obtained by the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, of the emission line gas...

The Hubble Deep Field South Flanking Fields (2002)

Lucas, Ray A., Baum, Stefi A., Brown, Thomas M., Casertano, Stefano, Conselice, Chris, De Mello, Duilia, ...

As part of the Hubble Deep Field South program, a set of shorter 2-orbit observations were obtained of the area adjacent to the deep fields. The WFPC2 flanking fields cover a contiguous solid angle...

High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - II. The properties of compact radio components (2001)

Thean, Andy, Pedlar, Alan, Kukula, Marek J., Baum, Stefi A., O'Dea, Christopher P.

We discuss the properties of compact nuclear radio components in Seyfert galaxies from the extended 12-micron AGN sample of Rush et al.(1993). Our main results can be summarised as follows. Type 1...

3C236: Radio Source, Interrupted? (2001)

O'Dea, Christopher P., Koekemoer, Anton M., Baum, Stefi A., Sparks, William B., Martel, Andre R., Allen, Mark G., ...

We present new HST STIS/MAMA near-UV images and archival WFPC2 V and R band images which reveal the presence of four star forming regions in an arc along the edge of the dust lane in the giant (4...

VLBA Observations Of A Sample Of Nearby FR I Radio Galaxies (2000)

Xu, Chun, Baum, Stefi A., O'Dea, Christopher P., Wrobel, J. M., Condon, J. J.

We observed 17 nearby low luminosity FR I radio galaxies using the NRAO Very Long Baseline Array (VLBA) at 1.67 GHz, as part of a multi-wavelength study of a complete sample of 21 sources selected by...

Face-on Dust Disks in Galaxies with Optical Jets (2000)

Sparks, William B., Baum, Stefi A., Biretta, John, Macchetto, F. Duccio, Martel, Andre' R.

The presence of optical synchrotron jets in radio galaxies is relatively rare. Here, we show that of the nearest five FR-I 3CR radio galaxies showing optical jets, {\it four} show evidence for almost...

Emission-Line Properties of 3CR Radio Galaxies III: Origins and Implications of the Velocity Fields (2000)

Baum, Stefi A., McCarthy, Patrick J.

We present the results of an analysis of the large scale velocity fields of the ionized gas associated with powerful radio galaxies. Long-slit spectra of 52 objects provide a sample of resolved...

High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - I. The observations (2000)

Thean, Andy, Pedlar, Alan, Kukula, Marek J., Baum, Stefi A., O'Dea, Christopher P.

We present 8.4 GHz VLA A-configuration observations of 87 sources from the mid-infrared-selected AGN sample of Rush et al (1993). These 0.25 arcsec resolution observations allow elongated radio...

Radio Loud and Radio Quiet Active Galactic Nuclei (1999)

Xu, Chun, Livio, Mario, Baum, Stefi A.

We generated a sample of 409 AGNs for which both the radio luminosity at 5 GHz and the line luminosity in [OIII] 5007 have been measured. The radio luminosity spans a range of ten orders of...

HST Snapshot Survey of 3CR Quasars: The Data (1999)

Lehnert, Matthew D., Miley, George K., Sparks, William B., Baum, Stefi A., Biretta, John, Golombek, Daniel, ...

We present images taken with the Wide Field Planetary Camera (WFPC-2) on the Hubble Space Telescope of 43 quasars selected from the 3CR radio catalog. The redshift range of the targets is large ---...

Large-Scale Outflows in Edge-on Seyfert Galaxies. III. Kiloparsec-Scale Soft X-ray Emission (1997)

Colbert, Edward J. M., Baum, Stefi A., O'Dea, Chris P., Veilleux, Sylvain

We present ROSAT PSPC and HRI images of eight galaxies selected from a distance-limited sample of 22 edge-on Seyfert galaxies. Kiloparsec-scale soft X-ray nebulae extend along the galaxy minor axes...

Imaging and spectroscopy of arcs around the most luminous X-ray cluster RX J1347.5-1145 (1997)

Sahu, Kailash C., Shaw, Richard A., Kaiser, Mary Elizabeth, Baum, Stefi A., Ferguson, Henry C., Hayes, Jeffrey J. E., ...

The cluster RX J1347.5-1145, the most luminous cluster in the X-ray wavelengths, was imaged with the newly installed Space Telescope Imaging Spectrograph (STIS) on-board HST. Its relatively high...

A direct image of the obscuring disk surrounding an active galactic nucleus (1997)

Gallimore, Jack F., Baum, Stefi A., O'Dea, Christopher P.

Active galactic nuclei (AGN) are generally accepted to be powered by the release of gravitational energy in a compact accretion disk surrounding a massive black hole. Such disks are also necessary to...

An infrared survey of brightest cluster galaxies: Paper I

Alice C. Quillen, Nicholas Zufelt, Jaehong Park, Christopher P. O’dea, Stefi A. Baum, George Privon, ...

We report on an imaging survey with the Spitzer Space Telescope of 62 brightest cluster galaxies with optical line emission. These galaxies are located in the cores of X-ray luminous clusters...