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Related papers: NOEMA Observations of CO Emission in Arp 142 and A…

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We present a comparison of the Solar Dynamics Observatory (SDO) analysis of NOAA Active Region (AR) 11158 and numerical simulations of flux-tube emergence, aiming to investigate the formation process of this flare-productive AR. First, we…

Solar and Stellar Astrophysics · Physics 2014-03-18 S. Toriumi , Y. Iida , K. Kusano , Y. Bamba , S. Imada

We investigate the relation between star formation rate (SFR) and stellar mass ($M_*$) in sub-galactic ($\sim 1$kpc) scale of 93 local ($0.01<z<0.02$) massive ($M_*>10^{10.5}M_{\odot}$) spiral galaxies. To derive spatially-resolved SFR and…

Astrophysics of Galaxies · Physics 2017-11-08 Abdurro'uf , Masayuki Akiyama

Starburst galaxies have elevated star formation rates (SFRs) for their stellar mass. In Ellison et al. (2018) we used integral field unit (IFU) maps of star formation rate surface density (Sigma_SFR) and stellar mass surface density…

In recent years, several protoplanetary discs have been observed to exhibit spirals, both in scattered light and (sub)millimetre continuum data. The HD 100453 binary star system hosts such a disc around its primary. Previous work has argued…

Nitrogen (N) fractionation is used as a tool to search for a link between the chemical history of the Solar System and star-forming regions. A large variation of $^{14}$N/$^{15}$N is observed towards different astrophysical sources, and…

Solar and Stellar Astrophysics · Physics 2019-03-27 L. Colzi , F. Fontani , P. Caselli , S. Leurini , L. Bizzocchi , G. Quaia

We investigate the response of the star formation efficiency (SFE) to the main parameters of simulations of molecular cloud formation by the collision of warm diffuse medium (WNM) cylindrical streams, neglecting stellar feedback and…

Astrophysics of Galaxies · Physics 2015-05-14 Yetli Rosas-Guevara , Enrique Vazquez-Semadeni , Gilberto C. Gomez , A. -Katharina Jappsen

We present single-dish CO(1-0) and CO(2-1) observations for 14 low-redshift quasi-stellar objects (QSOs). In combination with optical integral field spectroscopy we study how the cold gas content relates to the star formation rate (SFR) and…

Astrophysics of Galaxies · Physics 2017-07-19 B. Husemann , T. A. Davis , K. Jahnke , H. Dannerbauer , T. Urrutia , J. Hodge

In view of both the size of its gap and the previously reported asymmetries and near-infrared spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. This paper focuses on the morphology of the…

Earth and Planetary Astrophysics · Physics 2014-04-03 Valentin Christiaens , Simon Casassus , Sebastian Perez , Gerrit van der Plas , François Ménard

Utilizing ALFALFA HI data, we investigate the relationship between specific star formation rate (sSFR) and halo spin across various star-forming galaxies. Our analysis reveals weak yet statistically significant positive correlation between…

Astrophysics of Galaxies · Physics 2025-11-27 Wenxiao Xue , Zichen Hua , Yu Rong

Arp 302, a luminous infrared source (L_{IR} = 4.2x10^{11} Lsun), consisting of two spiral galaxies (VV340A and VV340B) with nuclear separation of 40'', has the highest CO luminosity known. Observations with the BIMA array at 5'' X 7''…

Astrophysics · Physics 2016-08-30 K. Y. Lo , Yu Gao , Robert A. Gruendl

Using star formation histories derived from optically resolved stellar populations in nineteen nearby starburst dwarf galaxies observed with the Hubble Space Telescope, we measure the stellar mass surface densities of stars newly formed in…

Dense, cold gas is the key ingredient for star formation. Over the last two decades, HCN(1-0) emission has been utilised as the most accessible dense gas tracer to study external galaxies. We present new measurements tracing the…

(Abridged) We present evidence that low-mass starless cores, the simplest units of star formation, are systematically differentiated in their chemical composition. Molecules including CO and CS almost vanish near the core centers, where the…

Astrophysics · Physics 2008-11-26 M. Tafalla , P. C. Myers , P. Caselli , C. M. Walmsley , C. Comito

Aims: We investigate how much of the [CII] emission in the nucleus of the nearby spiral galaxy IC 342 is contributed by PDRs and by the ionized gas. We examine the spatial variations of starburst/PDR activity and study the correlation of…

Astrophysics of Galaxies · Physics 2016-06-08 Markus Röllig , R. Simon , R. Güsten , J. Stutzki , F. Israel , K. Jacobs

We present a ~ 1" (100 pc) resolution 12CO (3-2) map of the nearby intermediate stage interacting galaxy pair NGC 4038/9 (the Antennae galaxies) obtained with the Submillimeter Array. We find that half the CO (3-2) emission originates in…

We study the star formation rate (SFR), stellar mass ($M_{\star}$) and the gas metallicity (Z) for 4,636 galaxy pairs using the Galaxy And Mass Assembly (GAMA) survey. Our galaxy pairs lie in a redshift range of 0 $<$ $z$ $<$ 0.35, mass…

Astrophysics of Galaxies · Physics 2021-01-20 L. E. Garduño , M. A. Lara-López , O. López-Cruz , A. M. Hopkins , M. S. Owers , K. A. Pimbblet , B. W. Holwerda

We present a spatially resolved analysis of the molecular star formation law (SFL) and gravitational instability in a sample of nearby dwarf galaxies (NGC 1035, NGC 4310, NGC 4451, NGC 4701, NGC 5692, and NGC 6106), using high-resolution…

Astrophysics of Galaxies · Physics 2025-11-27 Kijeong Yim , Soo-Chang Rey

Context. In order to understand galaxy evolution, it is essential to measure star formation rates (SFRs) across Cosmic times. Aims. The use of radio continuum emission as an extinction-free star formation tracer necessitates a good…

Astrophysics of Galaxies · Physics 2023-09-13 V. Heesen , S. Schulz , M. Brüggen , H. Edler , M. Stein , R. Paladino , A. Boselli , A. Ignesti , M. Fossati , R. -J. Dettmar

We report high spatial resolution observations of Giant Molecular Clouds (GMCs) in the nearby spiral galaxies NGC 6946, M101 and NGC 628 obtained with the CARMA telescope. We observed CO(1-0) over regions with active star formation, and…

Astrophysics of Galaxies · Physics 2015-11-25 David Rebolledo , Tony Wong , Rui Xue , Adam Leroy , Jin Koda , Jennifer Donovan Meyer

We present CO(3-2) emission observations toward the 3'x3' (or 20x20kpc at a distance of 23Mpc) region of the southern barred spiral galaxy NGC 986 using the Atacama Submillimeter Telescope Experiment (ASTE). This effort is a part of our…

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