The MOST Hosts Survey: spectroscopic observation of the host galaxies of 40,000 transients using DESI
arxiv(2024)
摘要
We present the MOST Hosts survey (Multi-Object Spectroscopy of Transient
Hosts). The survey is planned to run throughout the five years of operation of
the Dark Energy Spectroscopic Instrument (DESI) and will generate a
spectroscopic catalog of the hosts of most transients observed to date, in
particular all the supernovae observed by most public, untargeted, wide-field,
optical surveys (PTF/iPTF, SDSS II, ZTF, DECAT, DESIRT). Scientific questions
for which the MOST Hosts survey will be useful include Type Ia supernova
cosmology, fundamental plane and peculiar velocity measurements, and the
understanding of the correlations between transients and their host galaxy
properties. Here, we present the first release of the MOST Hosts survey: 21,931
hosts of 20,235 transients. These numbers represent 36
sample, consisting of 60,212 potential host galaxies of 38,603 transients (a
transient can be assigned multiple potential hosts). Of these galaxies, 40
not appear in the DESI primary target list and therefore require a specific
program like MOST Hosts. Of all the transients in the MOST Hosts list, only
26.7
(and luminosities) for nearly 30,000 transients. A preliminary Hubble diagram
and a transient luminosity-duration diagram are shown as examples of future
potential uses of the MOST Hosts survey. The survey will also provide a
training sample of spectroscopically observed transients for photometry-only
classifiers, as we enter an era when most newly observed transients will lack
spectroscopic classification. The MOST Hosts DESI survey data will be released
through the Wiserep platform on a rolling cadence and updated to match the DESI
releases. Dates of future releases and updates are available through the
https://mosthosts.desi.lbl.gov website.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要