English
Related papers

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

200 papers

We present evidence that super giant HII regions (GHRs) and other disk regions of the nearby spiral galaxy, M33, occupy distinct locations in the correlation between molecular gas, $\Sigma_{\rm H_2}$, and the star formation rate surface…

This study investigated the relation between the surface density of star formation rate (SFR) ($\Sigma_{\mathrm{SFR}}$), stellar mass ($\Sigma_{M_{\ast}}$), and molecular gas mass ($\Sigma_{M_\mathrm{mol}}$) on nearly 1 kpc scales averaged…

Recent studies have shown that star formation in mergers does not seem to follow the same Schmidt-Kennicutt (KS) relation as in spiral disks, presenting a higher star formation rate (SFR) for a given gas column density. In this paper we…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Médéric Boquien , Ute Lisenfeld , Pierre-Alain Duc , Jonathan Braine , Frédéric Bournaud , Elias Brinks , Vassilis Charmandaris

We used the SPIRE/FTS instrument aboard the Herschel Space Observatory (HSO) to obtain the Spectral Line Energy Distributions (SLEDs) of CO from J=4-3 to J=13-12 of Arp 193 and NGC 6240, two classical merger/starbursts selected from our…

We investigate the connection between star formation and molecular gas properties in galaxy mergers at low redshift (z$\leq$0.06). The study we present is based on IRAM 30-m CO(1-0) observations of 11 galaxies with a close companion…

Although the relationship between molecular gas content and the star formation rate (SFR) has been extensively studied in nearby galaxies, it remains controversial whether the star formation efficiency (SFE) depends on galactic structure.…

Astrophysics of Galaxies · Physics 2026-04-20 Tianyi GU , Yoshimasa Watanabe

Exploiting IRAM 30m CO spectroscopy, we find that SDSS post-merger galaxies display gas fractions and depletion times enhanced by 25-50%, a mildly higher CO excitation, and standard molecular-to-atomic gas ratios, compared to…

Astrophysics of Galaxies · Physics 2025-04-03 Mark T. Sargent , S. L. Ellison , J. T. Mendel , A. Saintonge , D. Cs. Molnár , T. Schwandt , J. M. Scudder , G. Violino

We report a super-linear correlation for the star formation law based on new CO($J$=1-0) data from the CARMA and NOBEYAMA Nearby-galaxies (CANON) CO survey. The sample includes 10 nearby spiral galaxies, in which structures at sub-kpc…

We report on the internal distribution of star formation efficiency in IRAS 08339+6517 (hereafter IRAS08), using $\sim$200~pc resolution CO(2-1) observations from NOEMA. The molecular gas depletion time changes by 2 orders-of-magnitude from…

Astrophysics of Galaxies · Physics 2022-04-13 D. B. Fisher , A. D. Bolatto , K. Glazebrook , D. Obreschkow , R. G. Obreschkow , G. G. Kacprzak , N. M. Nielsen

Mergers between a spiral and an elliptical (S+E mergers) are poorly studied so far despite the importance for galaxy evolution. NGC4441 is a nearby candidate for an advanced remnant of such a merger, showing typical tidal structures like an…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 E. Juette , S. Aalto , S. Huettemeister

Accretion shocks are thought to play a crucial role in the early stages of star and planet formation, but their direct observational evidence remains elusive, particularly regarding the molecular tracers of these processes. In this work, we…

(abridged) We report here a factor of 5.7 higher total CO flux in Arp~244 (the ``Antennae'' galaxies) than that previously accepted in the literature (thus a total molecular gas mass of 1.5x10$^{10}$ Msun), based on our fully sampled…

Astrophysics · Physics 2009-10-31 Yu Gao , K. Y. Lo , S. -W. Lee , T. -H. Lee

Spiral arms are some of the most spectacular features in disc galaxies, and also present in our own Milky Way. It has been argued that star formation should proceed more efficiently in spiral arms as a result of gas compression. Yet,…

We present Spitzer observations for a sample of close major-merger galaxy pairs (KPAIR sample) selected from 2MASS/SDSS-DR3 cross-matches. The goals are to study the star formation activity in these galaxies and to set a local bench mark…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 C. Kevin Xu , Donovan Domingue , Yi-Wen Cheng , Nanyao Lu , Jiasheng Huang , Yu Gao , Joseph M. Mazzarella , Roc Cutri , Wei-Hsin Sun , Jason Surace

In this work we present new APEX/SEPIA Band-5 observations targeting the CO ($J=2\text{-}1$) emission line of 24 Herschel-detected galaxies at $z=0.1-0.2$. Combining this sample {with} our recent new Valpara\'iso ALMA Line Emission Survey…

Knowledge about the distribution of CO emission in the Milky Way is essential to understand the impact of Galactic environment on the formation and evolution of structures in the interstellar medium. However, currently our insight about the…

Astrophysics of Galaxies · Physics 2020-08-19 M. Riener , J. Kainulainen , J. D. Henshaw , H. Beuther

Enhanced star formation (SF) with star-forming neighboring galaxies bolsters hydrodynamical contributions during paired interactions. Although the relative spin orientation between interacting galaxies can influence this effect, it has not…

Astrophysics of Galaxies · Physics 2025-10-28 Woong-Bae G. Zee , Jun-Sung Moon , Sanjaya Paudel , Suk-Jin Yoon

E+A galaxies are post-starburst systems that are identified from their optical spectra. These galaxies contain a substantial young A-type stellar component, but have only little ongoing star formation (SF). HI 21-cm line emission is found…

Astrophysics of Galaxies · Physics 2017-04-05 Anne Klitsch , Martin A. Zwaan , Harald Kuntschner , Warrick J. Couch , Michael B. Pracy , Matt Owers

Gas-rich minor mergers contribute significantly to the gas reservoir of early-type galaxies (ETGs) at low redshift, yet the star formation efficiency (SFE; the star formation rate divided by the molecular gas mass) appears to be strongly…