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Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-Forming Galaxies

Usero, Antonio; Leroy, Adam K.; Walter, Fabian; Schruba, Andreas; García-Burillo, Santiago; Sandstrom, Karin; Bigiel, Frank; Brinks, E.; Kramer, Carsten; Rosolowsky, Erik; Schuster, Karl-Friedrich; de Blok, W.J.G. (2015-10)

We present a new survey of HCN(1-0) emission, a tracer of dense molecular gas, focused on the little-explored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the ...

A low H I column density filament in NGC 2403 : signature of interaction or accretion

de Blok, W.J.G.; Keating, K.M.; Pisano, D.J.; Fraternali, F.; Walter, F.; Oosterloo, T.; Brinks, E.; Bigiel, F.; Leroy, A. (2014-09-25)

Observed H i accretion around nearby galaxies can only account for a fraction of the gas supply needed to sustain the currently observed star formation rates. It is possible that additional accretion occurs in the form of ...

The CO-to-H2 Conversion Factor and Dust-to-gas Ratio on Kiloparsec Scales in Nearby Galaxies

Sandstrom, K. M.; Leroy, A. K.; Walter, F.; Bolatto, A. D.; Croxall, K. V.; Draine, B. T.; Wilson, C. D.; Wolfire, M.; Calzetti, D.; Kennicutt, R. C.; Aniano, G.; Donovan Meyer, J.; Usero, A.; Bigiel, F.; Brinks, E.; de Blok, W.J.G.; Crocker, A.; Dale, D.; Engelbracht, C.W.; Galametz, M.; Groves, B.; Hunt, L. K.; Koda, J.; Kreckel, K.; Linz, H.; Meidt, S.; Pellegrini, E.; Rix, H-W.; Roussel, H.; Schinnerer, E.; Schruba, A.; Schuster, K-F.; Skibba, R.; van der Laan, T.; Appleton, P.; Armus, L.; Brandl, B.; Gordon, K.; Hinz, J.; Krause, O.; Montiel, E.; Sauvage, M.; Schmiedeke, A.; Smith, J.D.T.; Vigroux, L. (2013-10)

Molecular Gas and Star Formation in nearby Disk Galaxies

Leroy, A. K.; Walter, F.; Sandstrom, K.; Schruba, A.; Munoz-Mateos, J-C.; Bigiel, F.; Bolatto, A.; Brinks, E.; de Blok, W.J.G.; Meidt, S.; Rix, H-W.; Rosolowsky, E.; Schinnerer, E.; Schuster, K-F.; Usero, A. (2013-08)

Estimating the star formation rate at 1 kpc scales in nearby galaxies.

Leroy, Adam K.; Bigiel, Frank; de Blok, W.J.G.; Boissier, Samuel; Bolatto, Alberto; Brinks, E.; Madore, Barry; Munoz-Mateos, Juan-Carlos; Murphy, Eric; Sandstrom, Karin; Schruba, Andreas; Walter, Fabian (2012-07)

Using combinations of H alpha, ultraviolet (UV), and infrared (IR) emission, we estimate the star formation rate (SFR) surface density, Sigma(SFR), at 1 kpc resolution for 30 disk galaxies that are targets of the IRAM ...

Low CO luminosities in dwarf galaxies

Schruba, Andreas; Leroy, Adam K.; Walter, Fabian; Bigiel, Frank; Brinks, E.; de Blok, W.J.G.; Kramer, Carsten; Rosolowsky, Erik; Sandstrom, Karin; Schuster, Karl; Usero, Antonio; Weiss, Axel; Wiesemeyer, Helmut (2012-05-07)

We present maps of (12)COJ = 2-1 emission covering the entire star-forming disks of 16 nearby dwarf galaxies observed by the IRAM HERACLES survey. The data have 13 '' angular resolution, similar to 250 pc at our average ...

The central slope of dark matter cores in dwarf galaxies : simulations versus THINGS

Oh, S.H.; Brook, C.; Governato, F.; Brinks, E.; Mayer, L.; de Blok, W.J.G.; Brooks, A.; Walter, F. (2011)

We make a direct comparison of the derived dark matter (DM) distributions between hydrodynamical simulations of dwarf galaxies assuming ACDM cosmology and the observed dwarf galaxies sample from the THINGS survey in terms ...

A molecular star formation law in the atomic-gas-dominated regime in nearby galaxies

Schruba, A.; Leroy, A.; Walter, F.; Bigiel, F.; Brinks, E.; de Blok, W.J.G.; Dumas, G.; Kramer, C.; Rosolowsky, E.; Sandstrom, K.; Schuster, K-F.; Usero, Antonio; Weiss, A.; Wiesemeyer, H.W. (2011)

We use the IRAM HERACLES survey to study CO emission from 33 nearby spiral galaxies down to very low intensities. Using 21 cm line atomic hydrogen (H I) data, mostly from THINGS, we predict the local mean CO velocity based ...

Dark and luminous matter in THINGS dwarf galaxies

Oh, S.H.; de Blok, W.J.G.; Brinks, E.; Walter, F.; Kennicutt, R.C. (2011)

We present mass models for the dark matter component of seven dwarf galaxies taken from "The H I Nearby Galaxy Survey" (THINGS) and compare these with those taken from numerical Λ cold dark matter (ΛCDM) simulations. The ...

A constant molecular gas depletion time in nearby disk galaxies

Bigiel, F.; Leroy, A.; Walter, F.; Brinks, E.; de Blok, W.J.G.; Kramer, C.; Rix, H-W.; Schruba, A.; Schuster, K-F.; Usero, A.; Wiesemeyer, H.W. (2011)

We combine new sensitive, wide-field CO data from the HERACLES survey with ultraviolet and infrared data from GALEX and Spitzer to compare the surface densities of H2, ΣH2, and the recent star formation rate, ΣSFR, over ...