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First Batch of z ≈ 11-20 Candidate Objects Revealed by the James Webb Space Telescope Early Release Observations on SMACS 0723-73
Yan, Haojing; Cheng, Cheng; Ling, Chenxiaoji +2 more
On 2022 July 13, NASA released to the whole world the data obtained by the James Webb Space Telescope (JWST) Early Release Observations (ERO). These are the first set of science-grade data from this long-awaited facility, marking the beginning of a new era in astronomy. In the study of the early universe, JWST will allow us to push far beyond z ≈ …
Target Selection and Validation of DESI Emission Line Galaxies
Moustakas, J.; Myers, Adam D.; Yèche, Christophe +49 more
The Dark Energy Spectroscopic Instrument (DESI) will precisely constrain cosmic expansion and the growth of structure by collecting ~40 million extragalactic redshifts across ~80% of cosmic history and one-third of the sky. The Emission Line galaxy (ELG) sample, which will comprise about one-third of all DESI tracers, will be used to probe the uni…
Magnetic Fields in Star Formation: from Clouds to Cores
Ntormousi, E.; Pattle, K.; Liu, T. +2 more
In this chapter we review recent advances in understanding the roles that magnetic fields play throughout the star formation process, gained through observations and simulations of molecular clouds, the dense, star-forming phase of the magnetized, turbulent interstellar medium (ISM). Recent results broadly support a picture in which the magnetic f…
Gaia Data Release 3. Astrometric binary star processing
Arenou, Frédéric; Halbwachs, Jean-Louis; Teyssier, David +6 more
Context. The Gaia Early Data Release 3 contained the positions, parallaxes, and proper motions of 1.5 billion sources, some of which did not show a good fit to the `single star' model. Binarity is one of the causes of this.
Aims: Four million of these stars were selected and various models were tested to detect binary stars and to derive thei…
CEERS Key Paper. III. The Diversity of Galaxy Structure and Morphology at z = 3-9 with JWST
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +59 more
We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z = 3-9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our sample consists of 850 galaxies at z > 3 detected in both Hubble Space Telescope (HST)/WFC3 and CEERS JWST/NIRCam images, enabli…
Gaia Data Release 3. Mapping the asymmetric disc of the Milky Way
Prusti, T.; Mazeh, T.; Zucker, S. +445 more
Context. With the most recent Gaia data release, the number of sources with complete 6D phase space information (position and velocity) has increased to well over 33 million stars, while stellar astrophysical parameters are provided for more than 470 million sources, and more than 11 million variable stars are identified.
Aims: Using the astr…
Overview of the DESI Milky Way Survey
Miquel, Ramon; Myers, Adam D.; Bailey, Stephen +62 more
We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately seven million stars at Galactic latitudes |b| > 20°, with an inclusive target selection scheme focused on th…
Life beyond 30: Probing the -20 < M UV < -17 Luminosity Function at 8 < z < 13 with the NIRCam Parallel Field of the MIRI Deep Survey
Henning, Thomas; Pérez-González, Pablo G.; Costantin, Luca +41 more
We present the ultraviolet luminosity function and an estimate of the cosmic star formation rate density at 8 < z < 13 derived from deep NIRCam observations taken in parallel with the MIRI Deep Survey of the Hubble Ultra Deep Field (HUDF), NIRCam covering the parallel field 2. Our deep (40 hr) NIRCam observations reach an F277W magnitude of …
The Physical Conditions of Emission-line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations
Papovich, Casey; Cole, Justin W.; Finkelstein, Steven L. +63 more
We present rest-frame optical emission-line flux ratio measurements for five z > 5 galaxies observed by the James Webb Space Telescope Near-Infared Spectrograph (NIRSpec) in the SMACS 0723 Early Release Observations. We add several quality-control and post-processing steps to the NIRSpec pipeline reduction products in order to ensure reliable r…
CEERS Key Paper. IV. A Triality in the Nature of HST-dark Galaxies
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +52 more
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR-faint, mid-IR-bright sources, with HST-dark galaxies among them. We gather JWST data from the CEERS survey in the Extended Groth Strip, jointly with HST data, and analyze spatially resolved optical-…