- UHRA Home
- Browsing by Author
Browsing by Author "Leroy, A."
Now showing items 1-11 of 11
-
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 ... -
Extremely inefficient star formation in the outer disks of nearby galaxies
Bigiel, F.; Leroy, A.; Walter, F.; Blitz, L.; Brinks, E.; de Blok, W.J.G.; Madore, B. (2010)We combine data from The H I Nearby Galaxy Survey and the GALEX Nearby Galaxy Survey to study the relationship between atomic hydrogen (H I) and far-ultraviolet (FUV) emission outside the optical radius (r 25) in 17 spiral ... -
The fine-scale structure of the neutral interstellar medium in nearby galaxies
Bagetakos, I.; Brinks, E.; Walter, F.; de Blok, W.J.G.; Usero, A.; Leroy, A.; Rich, J.W.; Kennicutt, R.C. (2011)We present an analysis of the properties of H I holes detected in 20 galaxies that are part of "The H I Nearby Galaxy Survey." We detected more than 1000 holes in total in the sampled galaxies. Where they can be measured, ... -
The Gas Phase in a Low Metallicity ISM
Brinks, E.; Oh, S.H.; Bagetakos, I.; Bigiel, F.; Leroy, A.; Usero, A.; Walter, F.; de Blok, W.J.G.; Kennicutt, R.C. (2008)We present several results from our analysis of dwarf irregular galaxies culled from The HI Nearby Galaxy Survey (THINGS). We analyse the rotation curves of two galaxies based on “bulk” velocity fields, i.e. velocity maps ... -
Heracles: The HERA CO Line Extragalactic Survey
Leroy, A.; Walter, F.; Bigiel, F.; Usero, A.; Weiss, A.; Brinks, E.; de Blok, W.J.G.; Kennicutt, R.C.; Schuster, K-F.; Kramer, C.; Wiesemeyer, H.W.; Roussel, H. (2009)We present the Heterodyne Receiver Array CO Line Extragalactic Survey, an atlas of CO emission from 18 nearby galaxies that are also part of The H I Nearby Galaxy Survey and the Spitzer Infrared Nearby Galaxies Survey. We ... -
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 ... -
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 ... -
The star formation efficiency in nearby galaxies : measuring where gas forms stars effectively
Leroy, A.; Walter, F.; Brinks, E.; Bigiel, F.; de Blok, W.J.G.; Madore, B.; Thornley, M.D. (2008)We measure the star formation efficiency (SFE), the star formation rate (SFR) per unit of gas, in 23 nearby galaxies and compare it with expectations from proposed star formation laws and thresholds.We use Hi maps from The ... -
The star formation law in nearby galaxies on sub-kpc scales
Bigiel, F.; Leroy, A.; Walter, F.; Brinks, E.; de Blok, W.J.G.; Madore, B.; Thornley, M.D. (2008) -
THINGS: The HI Nearby Galaxy Survey
Walter, F.; Brinks, E.; de Blok, W.J.G.; Bigiel, F.; Kennicutt, R.C.; Thornley, M.D.; Leroy, A. (2008)We present “The HI Nearby Galaxy Survey (THINGS)”, a high spectral (≤5.2 kms−1) and spatial (~ 6′′) resolution survey of HI emission in 34 nearby galaxies obtained using the NRAO Very Large Array (VLA). The overarching ... -
What is Driving the H I Velocity Dispersion?
Tamburro, D.; Rix, H-W.; Leroy, A.; Mac Low, M.M.; Walter, F.; Kennicutt, R.C.; Brinks, E.; de Blok, W.J.G. (2009)