The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
GAS KINEMATICS ON GIANT MOLECULAR CLOUD SCALES IN M51 WITH PAWS: CLOUD STABILIZATION THROUGH DYNAMICAL PRESSURE
Open accessAbstract
We use the high spatial and spectral resolution of the PAWS CO(1–0) survey of the inner 9 kpc of the iconic spiral galaxy M51 to examine the effects of gas streaming motions on the star-forming properties of individual giant molecular clouds (GMCs). We compare our view of gas flows in M51—which arise due to departures from axisymmetry in the gravitational potential (i.e., the nuclear bar and spiral arms)—with the global pattern of star formation as traced by Hα and 24 μm emission. We find that the dynamical environment of GMCs strongly affects their ability to form stars, in the sense that GMCs situated in regions with large streaming motions can be stabilized, while similarly massive GMCs in regions without streaming go on to efficiently form stars. We argue that this is the result of reduced surface pressure felt by clouds embedded in an ambient medium undergoing large streaming motions, which prevent collapse. Indeed, the variation in gas depletion time expected based on the observed streaming motions throughout the disk of M51 quantitatively agrees with the variation in the observed gas depletion time scale. The example of M51 shows that streaming motions, triggered by gravitational instabilities in the form of bars and spiral arms, can alter the star formation law; this can explain the variation in gas depletion time among galaxies with different masses and morphologies. In particular, we can explain the long gas depletion times in spiral galaxies compared with dwarf galaxies and starbursts. We suggest that adding a dynamical pressure term to the canonical free-fall time produces a single star formation law that can be applied to all star-forming regions and galaxies across cosmic time.
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Citations
Cites
On the Gravitational Stability of a Disk of Stars
Toomre, A. (1964) · The Astrophysical Journal · doi:10.1086/147861 · Cited by 3,349 · cited 1×
“Following Toomre (1964) we take Σtoomre = ασκ πG (D1) as defining the threshold for stability in a thin rotating gas disk, whereby the ToomreQ=1 when Σtoomre = Σgas.”
MethodStar Formation in the Milky Way and Nearby Galaxies
Kennicutt, R. C., & Evans, N. J. (2012) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081811-125610 · Cited by 2,902 · cited 1×
“…Molecular Clouds (GMCs), the actual seeds of star formation, themselves could profoundly impact their star formation capabilities as evidenced by the large scatter of observed star formation rates (SFRs) in local Galactic GMCs (Mooney & Solomon 1988; Kennicutt & Evans 2012; Heiderman et al. 2010).”
BackgroundTHE STAR FORMATION EFFICIENCY IN NEARBY GALAXIES: MEASURING WHERE GAS FORMS STARS EFFECTIVELY
Leroy, A. K., Walter, F., Brinks, E., Bigiel, F., de Blok, W. J. G., Madore, B., & Thornley, M. D. (2008) · The Astronomical Journal · doi:10.1088/0004-6256/136/6/2782 · Cited by 1,919
Self-citationThe existence and shapes of dust lanes in galactic bars
Athanassoula, E. (1992) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/259.2.345 · Cited by 1,011 · cited 1×
“Star formation is thought to be inhibited in the strongest bars because of strong shocks and high shear (Athanassoula 1992; Sheth et al. 2005; but see Zurita et al. (2004) who suggest shocks help trigger star formation).”
BackgroundUnderstanding the kinematics of Galactic Centre gas
Binney, J., Gerhard, O. E., Stark, A. A., Bally, J., & Uchida, K. I. (1991) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/252.2.210 · Cited by 619 · cited 1×
“…(CMZ) are consistent with characteristic motions along bar orbits, but the evidence for inflow motions along a bar shock are less clear; the falloff in the signature ‘parallelogram envelope’ with increasing distance from the center in the pv diagram (Binney et al. 1991) is not especially obvious.”
BackgroundVariations in the Galactic star formation rate and density thresholds for star formation
Longmore, S. N., Bally, J., Testi, L., Purcell, C. R., Walsh, A. J., Bressert, E., Pestalozzi, M., Molinari, S., Ott, J., Cortese, L., et al. (2013) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sts376 · Cited by 357
ESTIMATING THE STAR FORMATION RATE AT 1 kpc SCALES IN NEARBY GALAXIES
Leroy, A. K., Bigiel, F., de Blok, W. J. G., Boissier, S., Bolatto, A., Brinks, E., Madore, B., Munoz-Mateos, J.-C., Murphy, E., Sandstrom, K., et al. (2012) · The Astronomical Journal · doi:10.1088/0004-6256/144/1/3 · Cited by 203 · cited 2×
“The latter value is consistent with molecular gas depletion times measured in the THINGS sample of nearby galaxies by Bigiel et al. (2011) and Leroy et al. (2008, 2012).”
BackgroundResultInfluentialSelf-citation
Cited by
García-Burillo, S., Combes, F., Usero, A., Aalto, S., Krips, M., Viti, S., Alonso-Herrero, A., Hunt, L. K., Schinnerer, E., Baker, A. J., et al. (2014) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201423843 · Cited by 473
Self-citationPHANGS–ALMA: Arcsecond CO(2–1) Imaging of Nearby Star-forming Galaxies
Leroy, A. K., Schinnerer, E., Hughes, A., Rosolowsky, E., Pety, J., Schruba, A., Usero, A., Blanc, G. A., Chevance, M., Emsellem, E., et al. (2021) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/ac17f3 · Cited by 391
Self-citationKrumholz, M. R. (2014) · Physics Reports · doi:10.1016/j.physrep.2014.02.001 · Cited by 321
A unified model for galactic discs: star formation, turbulence driving, and mass transport
Krumholz, M. R., Burkhart, B., Forbes, J. C., & Crocker, R. M. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sty852 · Cited by 319
A dynamical model for the formation of gas rings and episodic starbursts near galactic centres
Krumholz, M. R., & Kruijssen, J. M. D. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv1670 · Cited by 142
Metadata
- Authors
- Meidt, S. E., Schinnerer, E., García-Burillo, S., Hughes, A., Colombo, D., Pety, J., Dobbs, C. L., Schuster, K. F., Kramer, C., Leroy, A. K., Dumas, G., & Thompson, T. A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2013-11-25
- Volume
- 779
- Issue
- 1
- Pages
- 45
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2106243938
- Cited by
- 191
- References
- 7
- FWCI
- 11.12
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Meidt, S. E., Schinnerer, E., García-Burillo, S., Hughes, A., Colombo, D., Pety, J., Dobbs, C. L., Schuster, K. F., Kramer, C., Leroy, A. K., Dumas, G., & Thompson, T. A. (2013). GAS KINEMATICS ON GIANT MOLECULAR CLOUD SCALES IN M51 WITH PAWS: CLOUD STABILIZATION THROUGH DYNAMICAL PRESSURE. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/779/1/45
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