submitted to ApJ, 26 pages, 14 figures, comments welcome
We present the first results from a high resolution simulation with a focus on galactic wind driving for an isolated galaxy with a halo mass of ∼1011 M⊙ (similar to the Large Magellanic Cloud) and a total gas mass of ∼6×108 M⊙, resulting in ∼108 gas cells at ∼4 M⊙ mass resolution. We adopt a resolved stellar feedback model with non-equilibrium cooling and heating, including photoelectric heating and photo-ionizing radiation, as well as supernovae (SNe), coupled to the second order meshless finite mass (MFM) method for hydrodynamics. These features make this the largest resolved-ISM galaxy model run to date. We find mean star formation rates around 0.05 M⊙ yr−1 and evaluate typical time averaged loading factors for mass (ηM ∼ 1.0, in good agreement with recent observations) and energy (ηE ∼ 0.01). The bulk of the mass of the wind is transported by the warm (T<5×105K) phase, while there is a similar amount of energy transported in the warm and the hot phases (T>5×105K). We find an average opening angle of 30 degrees for the wind, decreasing with higher altitude above the midplane. The wind mass loading is decreasing (flat) for the warm (hot) phase as a function of the star formation surface rate density ΣSFR, while the energy loading shows inverted trends with ΣSFR, decreasing for the warm wind and increasing for the hot wind, although with very shallow slopes. These scalings are in good agreement with previous simulations of resolved wind driving in the multi-phase ISM.
17 pages, 8 figures, 4 tables, submitted to ApJ, comments welcome
In this paper we describe the survey design for the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) Cycle 1 JWST Treasury program, which executed its early imaging component in November 2022. The UNCOVER survey includes ultradeep (∼29−30AB) imaging of ∼45 arcmin2 on and around the well-studied Abell 2744 galaxy cluster at z=0.308 and will follow-up ∼500 galaxies with extremely deep low-resolution spectroscopy with the NIRSpec/PRISM during the summer of 2023. We describe the science goals, survey design, target selection, and planned data releases. We also present and characterize the depths of the first NIRCam imaging mosaic, highlighting previously unparalleled resolved and ultradeep 2-4 micron imaging of known objects in the field. The UNCOVER primary NIRCam mosaic spans 28.8 arcmin2 in seven filters (F115W, F150W, F200W, F277W, F356W, F410M, F444W) and 16.8 arcmin2 in our NIRISS parallel (F115W, F150W, F200W, F356W, and F444W). To maximize early community use of the Treasury data set, we publicly release full reduced mosaics of public JWST imaging including 45 arcmin2 NIRCam and 17 arcmin2 NIRISS mosaics on and around the Abell 2744 cluster, including the Hubble Frontier Field primary and parallel footprints.
19 pages, 12 figures, 5 tables. Resubmitted to MNRAS
We use high-resolution Hubble Space Telescope imaging data of dwarf galaxies in the Local Volume (≲ Mpc) to parameterise 19 newly discovered nuclear star clusters (NSCs). Most of the clusters have stellar masses of M_{\star}^{nsc} \lesssim 10^6 M_{\odot} and compare to Galactic globular clusters in terms of ellipticity, effective radius, stellar mass, and surface density. The clusters are modelled with a S\'ersic profile and their surface brightness evaluated at the effective radius reveals a tight positive correlation to the host galaxy stellar mass. Our data also indicate an increase in slope of the density profiles with increasing mass, perhaps indicating an increasing role for in-situ star formation in more massive hosts. We evaluate the scaling relation between the clusters and their host galaxy stellar mass to find an environmental dependence: for NSCs in field galaxies, the slope of the relation is \alpha = 0.82^{+0.08}_{-0.08} whereas \alpha = 0.55^{+0.06}_{-0.05} for dwarfs in the core of the Virgo cluster. Restricting the fit for the cluster to M_{\star}^{gal} \geq 10^{6.5} M_{\odot} yields \alpha = 0.70^{+0.08}_{-0.07}, in agreement with the field environment within the 1\sigma interval. The environmental dependence is due to the lowest-mass nucleated galaxies and we speculate that this is either due to an increased number of progenitor globular clusters merging to become an NSC, or due to the formation of more massive globular clusters in dense environments, depending on the initial globular cluster mass function. Our results clearly corroborate recent results in that there exists a tight connection between NSCs and globular clusters in dwarf galaxies.
Accepted for publication in The Astronomical Journal
22 pages, 10 figures, 2 tables, to submitted to ApJ
26 pages, 8 figures
25 pages, 25 figures, submitted to ApJ
17 pages, 19 figures, 2 tables, submitted to MNRAS
Submitted to proceedings of ADASS32; 8 pages, 3 figures. Try the WWT app at this https URL
3 pages, 1 figure; accepted in RNAAS
21 pages, 5 figures, 7 tables
41 pages, 21 figures, 2 tables. Accepted to ApJ
16 pages, 9 figures, ApJ submitted
12 pages, 4 figures, published in Nature Astronomy
22 pages, 11 figures, submitted to ApJ
13 pages, 12 figures
Review prepared for Review of Modern Physics, version after addressing referees' comments. Community input solicited. Helpful comments received within a week will be included in the final version. 79 pages
41 pages, 27 figures, accepted for publication by MNRAS
accepted by MNRAS
Accepted in A&A. CLV data will be made available with A&A Publication in the near future
20 pages, 14 figures. Accepted in A&A
10 pages, 4 figures, accepted by ApJ
20 pages, 13 figures, submitted to ApJ
5 pages, 4 figures, Accepted for publication in MNRAS, this https URL &t=1s
8 pages, 5 figures
7 pages, 7 figures, MNRAS accepted
Accepted for publication in PASJ. 18 pages, 21 figures
19 pages, 8 figures
9 pages, 6 figures
19 pages, 10 figures, 6 tables
17 pages, 8 figures, 7 tables. accepted in PRD
Submitted to Nuclear Instruments and Methods A
22 pages, 6 figures, accepted by ApJL
Accepted for publication in 'The Astrophysical Journal'
20 pages, 11 figures, submitted to ApJ
10 pages, 11 figures, submitted to ApJ
6 pages, 2 figures, to be published in the South African Institute for Physics 2022 conference proceedings
ApJ accepted, 40 pages, 19 Figures
15 pages, 3 tables, 8 figures. Accepted for publication in ApJ
14 pages, 12 figures, resubmitted to APJ
Proceedings of the 27th European Cosmic Ray Symposium - ECRS 2022 - 25-29 July 2022 - Nijmegen, the Netherlands
Proceedings of the 27th European Cosmic Ray Symposium - ECRS 2022 - 25-29 July 2022 - Nijmegen, the Nederlands
20 pages, 17 figures, accepted for publication in MNRAS
12 pages, 12 figures, 3 equations
Accepted for publication in the Astrophysical Journal
15 pages, 8 figures
18 pages, 11 figures
5 pages, 3 figures, submitted. Comments are welcome!
18 pages, 10 figures, accepted for publication in MNRAS
16 pages, 8 figures
To be submitted. Comments welcome
14 Pages, 10 Figures, Submitted to MNRAS
14 pages, accepted for publication in MNRAS
33 pages, 11 figures
Version after addressing referee report. See companion paper by Schindler et al
Submitted to ApJ
16 pages, 12 figures. Abstract abridged for arXiv
Submitted
Submitted November 17, 2022
21 pages + appendix, 15 figures, 1 table; submitted to Astronomy & Astrophysics
5+11 pages, 2+10 figures
16 pages, 6 figures. Numerical codes released in this https URL
7 pages, 1 figure
11 pages, 7 figures
18 pages, 1 figure
6 latex pages, final version for journal publication
Forthcoming in a special issue of Universe
23 pages, 3 figures, 1 table