Tim Heckman

Studying Large- and Small-Scale Environments of Ultraviolet Luminous Galaxies (2009)

Basu-Zych, Antara R., Schiminovich, David, Heinis, Sebastien, Overzier, Roderik, Heckman, Tim, Zamojski, Michel, ...

Studying the environments of 0.4 < z < 1.2 ultraviolet (UV)-selected galaxies, as examples of extreme star-forming galaxies (with star formation rates (SFRs) in the range of 3-30 M_☉ yr^(–1)), we...

An OSIRIS Study of the Gas Kinematics in a Sample of UV-Selected Galaxies: Evidence of "Hot and Bothered" Starbursts in the Local Universe (2009)

Basu-Zych, Antara R., Gonçalves, Thiago S., Overzier, Roderik, Law, David R., Schiminovich, David, Heckman, Tim, ...

We present data from Integral Field Spectroscopy for three supercompact UV-Luminous Galaxies (ScUVLGs). As nearby (z ~ 0.2) compact (R_(50) ~ 1-2 kpc) bright Paschen-α sources, with unusually high...

Luminous Thermal Flares from Quiescent Supermassive Black Holes (2009)

Gezari, Suvi, Heckman, Tim, Cenko, S. Bradley, Eracleous, Michael, Forster, Karl, Gonçalves, Thiago S., ...

A dormant supermassive black hole lurking in the center of a galaxy will be revealed when a star passes close enough to be torn apart by tidal forces, and a flare of electromagnetic radiation is...

An OSIRIS study of the gas kinematics in a sample of UV-selected galaxies: Evidence of "Hot and Bothered" starbursts in the local Universe (2009)

Basu-Zych, Antara R., Goncalves, Thiago S., Overzier, Roderik, Law, David R., Schiminovich, David, Heckman, Tim, ...

We present data from Integral Field Spectroscopy for 3 supercompact UV-Luminous Galaxies (ScUVLGs). As nearby (z~0.2), compact (R_50~1-2 kpc), bright Paschen-alpha sources, with unusually high star...

Luminous Thermal Flares from Quiescent Supermassive Black Holes (2009)

Gezari, Suvi, Heckman, Tim, Cenko, S. Bradley, Eracleous, Michael, Forster, Karl, Goncalves, Thiago S., ...

A dormant supermassive black hole lurking in the center of a galaxy will be revealed when a star passes close enough to be torn apart by tidal forces, and a flare of electromagnetic radiation is...

Bursty stellar populations and obscured AGN in galaxy bulges (2007)

Wild, Vivienne, Kauffmann, Guinevere, Heckman, Tim, Charlot, Stéphane, Lemson, Gerard, Brinchmann, Jarle, ...

[Abridged] We investigate trends between the recent star formation history and black hole growth in galaxy bulges in the Sloan Digital Sky Survey (SDSS). The galaxies lie at 0.01

An Atlas of the circumnuclear regions of 75 Seyfert galaxies in the near-UV with HST Advanced Camera for Surveys (2007)

Marín, Víctor M. Muñoz, Delgado, Rosa M. González, Schmitt, Henrique R., Fernandes, Roberto Cid, Pérez, Enrique, Storchi-Bergmann, Thaisa, ...

We present an atlas of the central regions of 75 Seyfert galaxies imaged in the near-UV with the Advanced Camera for Surveys of the Hubble Space Telescope at an average resolution of ~10pc. These...

Suppression of star formation in early-type galaxies by feedback from supermassive black holes (2007)

Schawinski, Kevin, Khochfar, Sadegh, Kaviraj, Sugata, Yi, Sukyoung K., Boselli, Alessandro, Barlow, Tom, ...

Detailed high-resolution observations of the innermost regions of nearby galaxies have revealed the presence of supermassive black holes1. These black holes may interact with their host galaxies by...

Bursty stellar populations and obscured active galactic nuclei in galaxy bulges (2007)

Wild, Vivienne, Kauffmann, Guinevere, Heckman, Tim, Charlot, Stéphane, Lemson, Gerard, Brinchmann, Jarle, ...

We investigate trends between the recent star formation history and black hole growth in galaxy bulges in the Sloan Digital Sky Survey. The galaxies lie at 0.01 < z < 0.07 where the fibre aperture...

Suppression of star formation in early-type galaxies by feedback from supermassive black holes (2006)

Schawinski, Kevin, Khochfar, Sadegh, Kaviraj, Sugata, Yi, Sukyoung K., Boselli, Alessandro, Barlow, Tom, ...

Detailed high-resolution observations of the innermost regions of nearby galaxies have revealed the presence of supermassive black holes1. These black holes may interact with their host galaxies by...

The Host Galaxies and Classification of Active Galactic Nuclei (2006)

Kewley, Lisa J., Groves, Brent, Kauffmann, Guinevere, Heckman, Tim

We present an analysis of the host properties of 85224 emission-line galaxies from the Sloan Digital Sky Survey. We show that Seyferts and LINERs form clearly separated branches on the standard...

Colors and magnitudes of quasar host galaxies at high redshift (2004)

Ridgway, Susan E., Heckman, Tim, Lacy, Mark

We discuss the results so far of a program to image in the rest-frame optical and near-UV the host galaxies of a sample of 5 high redshift (z ~ 2–3) radio-quiet quasars with nuclear luminosities...

The X-Ray Derived Cosmological Star Formation History and the Galaxy X-Ray Luminosity Functions in the Chandra Deep Fields North and South (2004)

Norman, Colin, Ptak, Andrew, Hornschemeier, Ann, Hasinger, Guenther, Bergeron, Jacqueline, Comastri, Andrea, ...

The cosmological star formation rate in the combined Chandra Deep Fields North and South is derived from our X-Ray Luminosity Function for Galaxies in these Deep Fields. Mild evolution is seen up to...

Old and Young X-ray Point Source Populations in Nearby Galaxies (2003)

Colbert, Edward, Heckman, Tim, Ptak, Andy, Strickland, Dave, Weaver, Kim

We analyzed 1441 Chandra X-ray point sources in 32 nearby galaxies. The total point-source X-ray luminosity L_XP is well correlated with B, K, and FIR+UV luminosities of spiral host galaxies, and...

Diagnostics of composite starburst+Seyfert 2 nuclei: Hints on the starburst-AGN connection (2001)

Fernandes, Roberto Cid, Heckman, Tim, Schmitt, Henrique, Delgado, Rosa Maria González, Storchi-Bergmann, Thaisa

We present a simple population synthesis scheme which recognizes composite starburst+Seyfert 2 nuclei from a few easy-to-obtain optical measurements. Composite systems seem to evolve towards less...

Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections (2001)

Menou, Kristen, Berk, Daniel E. Vanden, Ivezic, Zeljko, Kim, Rita S. J., Knapp, Gillian R., Richards, Gordon T., ...

We present 13 Broad Absorption Line (BAL) quasars, including 12 new objects, which were identified in the Sloan Digital Sky Survey (SDSS) and matched within 2'' to sources in the FIRST radio survey...

Ultraviolet Line Spectra of Metal-Poor Star-Forming Galaxies (2000)

Leitherer, Claus, Leao, Joao, Heckman, Tim, Lennon, Daniel, Pettini, Max, Robert, Carmelle

We present synthetic ultraviolet spectra of metal-poor star-forming galaxies which were calculated with the Starburst99 package. A new spectral library was generated from HST observations of O stars...

Hubble Space Telescope Observations of the Associated Absorption Systems in Q0122+0338 (1999)

Papovich, Casey, Norman, Colin A., Bowen, David V., Heckman, Tim, Savaglio, Sandra, Koekemoer, Anton M., ...

We have studied a spectrum of Q0122+0338 (z = 1.202) obtained by the FOS on board HST. We present the analysis of three associated absorption systems at z = 1.207, 1.199 and 1.166. The most complex...