Nobeyama CO Atlas of Nearby Spiral Galaxies: Distribution of Molecular Gas in Barred and Nonbarred Spiral Galaxies
Nario Kuno,Naoko Sato,Hiroyuki Nakanishi,Akihiko Hirota,Tomoka Tosaki,Yasuhiro Shioya,Kazuo Sorai,Naomasa Nakai,Kota Nishiyama,Baltsar Vila-VilarÓ +9 more
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TLDR
In this paper, the influence of bar on the distribution of molecular gas in spiral galaxies using the data from a CO(1 - 0) mapping survey of 40 nearby spiral galaxies performed with the Nobeyama 45m telescope is presented.Abstract:
The data from a CO(1 - 0) mapping survey of 40 nearby spiral galaxies performed with the Nobeyama 45-m telescope are presented. The criteria of the sample selection were (1) RC3 morphological type in the range Sa to Scd, (2) distance less than 25 Mpc, (3) inclination angle less than 79deg (RC3), (4) flux at 100 um higher than ~ 10 Jy, (5) spiral structure is not destroyed by interaction. The maps of CO cover most of the optical disk of the galaxies. We investigated the influence of bar on the distribution of molecular gas in spiral galaxies using these data. We confirmed that the degree of central concentration is higher in barred spirals than in non-barred spirals as shown by the previous works. Furthermore, we present an observational evidence that bars are efficient in driving molecular gas that lies within the bar length toward the center, while the role in bringing gas in from the outer parts of the disks is small. The transported gas accounts for about half of molecular gas within the central region in barred spiral galaxies. We found a correlation between the degree of central concentration and bar strength. Galaxies with stronger bars tend to have higher central concentration. The correlation implies that stronger bars accumulate molecular gas toward the center more efficiently. These results are consistent with long-lived bars.read more
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A study of the gas–star formation relation over cosmic time
Reinhard Genzel,Linda J. Tacconi,Javier Graciá-Carpio,Amiel Sternberg,Michael C. Cooper,Kristen L. Shapiro,Alberto D. Bolatto,Nicolas Bouché,Frédéric Bournaud,Andreas Burkert,Francoise Combes,Julia M. Comerford,Pierre Cox,Michael Davis,N. M. Förster Schreiber,Santiago García-Burillo,Dieter Lutz,Thorsten Naab,R. Neri,A. Omont,Alice E. Shapley,Benjamin J. Weiner +21 more
TL;DR: In this paper, the authors used the first systematic data sets of CO molecular line emission in z∼ 1 − 3 normal star-forming galaxies (SFGs) for a comparison of the dependence of galaxy-averaged star formation rates on molecular gas masses at low and high redshifts, and in different galactic environments.
2MASS large galaxy atlas
Abstract: We present the largest galaxies as seen in the near-infrared (1–2 μm), imaged with the Two Micron All Sky Survey (2MASS), ranging in angular size from 1' to 15. We highlight the 100 largest in the sample. The galaxies span all Hubble morphological types, including elliptical galaxies, normal and barred spirals, and dwarf and peculiar classes. The 2MASS Large Galaxy Atlas provides the necessary sensitivity and angular resolution to examine in detail morphologies in the near-infrared, which may be radically different from those in the optical. Internal structures such as spirals, bulges, warps, rings, bars, and star formation regions are resolved by 2MASS. In addition to large mosaic images, the atlas includes astrometric, photometric, and shape global measurements for each galaxy. A comparison of fundamental measures (e.g., surface brightness, Hubble type) is carried out for the sample and compared with the Third Reference Catalogue. We further showcase NGC 253 and M51 (NGC 5194/5195) to demonstrate the quality and depth of the data. The atlas represents the first uniform, all-sky, dust-penetrated view of galaxies of every type, as seen in the near-infrared wavelength window that is most sensitive to the dominant mass component of galaxies. The images and catalogs are available through the NASA/IPAC Extragalactic Database and Infrared Science Archive and are part of the 2MASS Extended Source Catalog.
Journal ArticleDOI
Molecular gas and star formation in nearby disk galaxies
Adam K. Leroy,Fabian Walter,Karin Sandstrom,Andreas Schruba,Juan-Carlos Muñoz-Mateos,Frank Bigiel,Alberto D. Bolatto,Elias Brinks,W. J. G. de Blok,Sharon E. Meidt,Hans-Walter Rix,Erik Rosolowsky,Eva Schinnerer,K. F. Schuster,Antonio Usero +14 more
TL;DR: In this paper, the authors compare molecular gas traced by CO (2-1) maps from the HERACLES survey, with tracers of the recent star formation rate (SFR) across 30 nearby disk galaxies.
Journal ArticleDOI
Heracles: the hera co line extragalactic survey
Adam Leroy,Fabian Walter,Frank Bigiel,Antonio Usero,Achim Weiss,Elias Brinks,W. J. G. de Blok,W. J. G. de Blok,R. C. Kennicutt,K. F. Schuster,Carsten Kramer,Helmut Wiesemeyer,Helene Roussel,Helene Roussel +13 more
TL;DR: In this paper, the authors proposed a method to find the minimum number of stars in the UHRA data set, which is not available in the data set available in this paper.
Journal ArticleDOI
COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies – I. Relations between H2, H i, stellar content and structural properties
Amélie Saintonge,Guinevere Kauffmann,Carsten Kramer,Linda J. Tacconi,Christof Buchbender,Barbara Catinella,Silvia Fabello,Javier Graciá-Carpio,Jing Wang,Luca Cortese,Jian Fu,Reinhard Genzel,Riccardo Giovanelli,Qi Guo,Qi Guo,Martha P. Haynes,Timothy M. Heckman,Mark R. Krumholz,Jenna Lemonias,Cheng Li,Cheng Li,Sean M. Moran,Nemesio Rodriguez-Fernandez,David Schiminovich,Karl Schuster,A. Sievers +25 more
TL;DR: In this paper, the authors conducted a legacy survey for molecular gas in nearby galaxies using the IRAM 30-m telescope, measuring the CO(1-0) line in a sample of similar to 350 nearby (D-L similar or equal to 100-200 Mpc), massive galaxies (log(M-*/M-circle dot) > 10.0).
References
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Third Reference Catalogue of Bright Galaxies
Gerard de Vaucouleurs,Antoinette de Vaucouleurs,Harold G. Corwin,Ronald J. Buta,G. Paturel,P. Fouque +5 more
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Journal ArticleDOI
The 2MASS Large Galaxy Atlas
TL;DR: The 2MASS Large Galaxy Atlas as mentioned in this paper provides the necessary sensitivity and angular resolution to examine in detail morphologies in the near-infrared, which may be radically different from those in the optical.
Journal ArticleDOI
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