Ionized Gas Towards Molecular Clumps: Physical Properties of Massive Star Forming Regions (2009)
Johnston, Katharine G., Shepherd, Debra S., Aguirre, James E., Dunham, Miranda K., Rosolowsky, Erik, Wood, Kenneth
We have conducted a search for ionized gas at 3.6 cm, using the Very Large Array, towards 31 Galactic intermediate- and high-mass clumps detected in previous millimeter continuum observations. In the...
The Bolocam Galactic Plane Survey -- II. Catalog of the Image Data (2009)
Rosolowsky, Erik, Dunham, Miranda K., Ginsburg, Adam, Bradley, Eric Todd, Aguirre, James, Bally, John, ...
We present a catalog of 8358 sources extracted from images produced by the Bolocam Galactic Plane Survey (BGPS). The BGPS is a survey of the millimeter dust continuum emission from the northern...
Variable Sodium Absorption in a Low-extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
Variable Sodium Absorption in a Low-Extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
Variable sodium absorption in a low-extinction type Ia supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Resolved Properties of Extragalactic Giant Molecular Clouds (2008)
Bolatto, Alberto D., Leroy, Adam K., Rosolowsky, Erik, Walter, Fabian, Blitz, Leo
Giant molecular clouds (GMCs) are the major reservoirs of molecular gas in galaxies, and the starting point for star formation. As such, their properties play a key role in setting the initial...
The Gas Temperature of Starless Cores in Perseus (2008)
Schnee, Scott, Rosolowsky, Erik, Foster, Jonathan, Enoch, Melissa, Sargent, Anneila
In this paper we study the determinants of starless core temperatures in the Perseus molecular cloud. We use NH3 (1,1) and (2,2) observations to derive core temperatures (T_kin) and data from the...
The mass distribution and lifetime of prestellar cores in Perseus, Serpens, and Ophiuchus (2008)
Enoch, Melissa L., Sargent, Anneila I., Glenn, Jason, Rosolowsky, Erik, Myers, Philip
We present an unbiased census of starless cores in Perseus, Serpens, and Ophiuchus, assembled by comparing large-scale Bolocam 1.1 mm continuum emission maps with Spitzer c2d surveys. We use the c2d...
The Resolved Properties of Extragalactic Giant Molecular Clouds (2008)
Bolatto, Alberto D., Leroy, Adam K., Rosolowsky, Erik, Walter, Fabian, Blitz, Leo
We use high spatial resolution observations of CO to systematically measure the resolved size-line width, luminosity-line width, luminosity-size, and the mass-luminosity relations of Giant Molecular...
The Mass Distribution and Lifetime of Prestellar Cores in Perseus, Serpens, and Ophiuchus (2008)
Enoch, Melissa L., Evans II, Neal J., Sargent, Anneila I., Glenn, Jason, Rosolowsky, Erik, Myers, Philip
We present an unbiased census of starless cores in Perseus, Serpens, and Ophiuchus, assembled by comparing large-scale Bolocam 1.1 mm continuum emission maps with Spitzer c2d surveys. We use the c2d...
The M33 metallicity project: Resolving the abundance gradient discrepancies in M33 (2008)
Rosolowsky, Erik, Simon, Joshua D.
We present a new determination of the metallicity gradient in M33, based on Keck LRIS measurements of oxygen abundances using the temperature-sensitive emission line [O III] λ4363 in 61 H II...
The resolved properties of extragalactic giant molecular clouds (2008)
Bolatto, Alberto D., Leroy, Adam K., Rosolowsky, Erik, Walter, Fabian, Blitz, Leo
We use high spatial resolution observations of CO to systematically measure the resolved size-line width, luminosity-line width, luminosity-size, and mass-luminosity relations of GMCs in a variety of...
A Metallicity Map of M33 (2007)
Simon, Joshua D., Rosolowsky, Erik
We present initial results from the M33 Metallicity Project. Out of the thousands of cataloged HII regions in M33, only ~30 have electron-temperature based abundances in the literature. We have...
The M33 Metallicity Project: Resolving the Abundance Gradient Discrepancies in M33 (2007)
Rosolowsky, Erik, Simon, Joshua D.
We present a new determination of the metallicity gradient in M33, based on Keck/LRIS measurements of oxygen abundances using the temperature-sensitive emission line [OIII] 4363 A in 61 HII regions....
The Role of Pressure in GMC Formation II: The H_2 - Pressure Relation (2006)
We show that the ratio of molecular to atomic gas in galaxies is determined by hydrostatic pressure and that the relation between the two is nearly linear. The pressure relation is shown to be good...
Giant Molecular Clouds in Local Group Galaxies (2006)
Blitz, Leo, Fukui, Yasuo, Kawamura, Akiko, Leroy, Adam, Mizuno, Norikazu, Rosolowsky, Erik
We present the first comparative study of extragalactic GMCs using complete data sets for entire galaxies and a uniform set of reduction and analysis techniques. We present results based on CO...
Bias-free Measurement of Giant Molecular Cloud Properties (2006)
(abridged) We review methods for measuring the sizes, line widths, and luminosities of giant molecular clouds (GMCs) in molecular-line data cubes with low resolution and sensitivity. We find that...
The Initial Mass Function of GMCs (2004)
The properties of GMCs in several Local Group galaxies are quantified and compared. It is found that the mass spectrum of GMCs varies from galaxy to galaxy. The variations are significant and do not...
GMC Formation in M33: the Role of Pressure (2004)
We present a complete map of the Giant Molecular Clouds in M33 and show that they lie exclusively on filaments of HI. The GMCs are localized on the extended HI filaments, and HI filaments extend well...
The Role of Pressure in GMC Formation (2004)
We examine the hypothesis that hydrostatic pressure alone determines the ratio of atomic to molecular gas averaged over a particular radius in disk galaxies. The hypothesis implies that the...
Giant Molecular Clouds in M33 -- II. High Resolution Observations (2003)
Rosolowsky, Erik, Engargiola, Greg, Plambeck, Richard, Blitz, Leo
We present 12CO(1->0) observations of 45 giant molecular clouds in M33 made with the BIMA array. The observations have a linear resolution of 20 pc, sufficient to measure the sizes of most GMCs in...