Matches in SemOpenAlex for { <https://semopenalex.org/work/W2024352997> ?p ?o ?g. }
- W2024352997 endingPage "96" @default.
- W2024352997 startingPage "96" @default.
- W2024352997 abstract "We report the discovery and follow-up observations of a system of three objects identified by the ALFALFA extragalactic HI survey, cataloged as (almost) dark extragalactic sources, i.e., extragalactic HI detections with no discernible counterpart in publicly available, wide-field, imaging surveys. We have obtained deep optical imaging with WIYN pODI and HI synthesis maps with WSRT of the HI1232+20 system. The source with the highest HI flux has a newly discovered ultra-low surface brightness (LSB) optical counterpart associated with it, while the other two sources have no detected optical counterparts in our images. Our optical observations show that the detected LSB optical counterpart has a peak surface brightness of ~26.4 mag/arcsec^2 in g', which is exceptionally faint. This source (AGC 229385) has the largest accurately measured HI mass-to-light ratio of an isolated object: MHI/Lg'=46 Msun/Lsun, and has an HI mass of 7.2*10^8 Msun. The other two HI sources (with HI masses 2.0*10^8 and 1.2*10^8 Msun) without optical counterparts have upper limit surface brightnesses of 27.9 and 27.8 mag/arcsec^2 in g', and lower limits on their gas mass-to-light ratio of MHI/Lg'>57 and >31 Msun/Lsun. This system lies relatively close in projection to the Virgo Cluster, but velocity flow models indicate that it is located at ~25 Mpc, substantially beyond Virgo. The system appears to be quite isolated, with no known object closer than 500 kpc. These HI sources may represent both sides of the threshold between dark star-less galaxies and galaxies with stellar populations. We discuss a variety of possible formation scenarios for the HI1232+20 system." @default.
- W2024352997 created "2016-06-24" @default.
- W2024352997 creator A5004866113 @default.
- W2024352997 creator A5012678431 @default.
- W2024352997 creator A5024494537 @default.
- W2024352997 creator A5026672942 @default.
- W2024352997 creator A5027207716 @default.
- W2024352997 creator A5027602092 @default.
- W2024352997 creator A5028165953 @default.
- W2024352997 creator A5043639808 @default.
- W2024352997 creator A5065269559 @default.
- W2024352997 creator A5073595145 @default.
- W2024352997 date "2015-03-10" @default.
- W2024352997 modified "2023-09-23" @default.
- W2024352997 title "(ALMOST) DARK HI SOURCES IN THE ALFALFA SURVEY: THE INTRIGUING CASE OF HI1232+20" @default.
- W2024352997 cites W1776440546 @default.
- W2024352997 cites W1969070606 @default.
- W2024352997 cites W1970058472 @default.
- W2024352997 cites W1971531178 @default.
- W2024352997 cites W1972608407 @default.
- W2024352997 cites W1978642495 @default.
- W2024352997 cites W1978875836 @default.
- W2024352997 cites W1984036494 @default.
- W2024352997 cites W1986751831 @default.
- W2024352997 cites W1987522415 @default.
- W2024352997 cites W1991471447 @default.
- W2024352997 cites W1995619964 @default.
- W2024352997 cites W1996537612 @default.
- W2024352997 cites W1999445914 @default.
- W2024352997 cites W2001341434 @default.
- W2024352997 cites W2012199985 @default.
- W2024352997 cites W2026842507 @default.
- W2024352997 cites W2026982497 @default.
- W2024352997 cites W2029343094 @default.
- W2024352997 cites W2033599776 @default.
- W2024352997 cites W2034881171 @default.
- W2024352997 cites W2037626614 @default.
- W2024352997 cites W2039054057 @default.
- W2024352997 cites W2043759650 @default.
- W2024352997 cites W2045028470 @default.
- W2024352997 cites W2050474390 @default.
- W2024352997 cites W2052923345 @default.
- W2024352997 cites W2052937506 @default.
- W2024352997 cites W2062215462 @default.
- W2024352997 cites W2062622766 @default.
- W2024352997 cites W2069122315 @default.
- W2024352997 cites W2070381879 @default.
- W2024352997 cites W2083214570 @default.
- W2024352997 cites W2084406962 @default.
- W2024352997 cites W2084750836 @default.
- W2024352997 cites W2085514986 @default.
- W2024352997 cites W2088909704 @default.
- W2024352997 cites W2090231561 @default.
- W2024352997 cites W2101173616 @default.
- W2024352997 cites W2106239882 @default.
- W2024352997 cites W2109896455 @default.
- W2024352997 cites W2111817932 @default.
- W2024352997 cites W2113930045 @default.
- W2024352997 cites W2116466430 @default.
- W2024352997 cites W2136623067 @default.
- W2024352997 cites W2140137154 @default.
- W2024352997 cites W2146026248 @default.
- W2024352997 cites W2149920062 @default.
- W2024352997 cites W2150334484 @default.
- W2024352997 cites W2158575127 @default.
- W2024352997 cites W2163809022 @default.
- W2024352997 cites W2165003596 @default.
- W2024352997 cites W2166365370 @default.
- W2024352997 cites W2168110081 @default.
- W2024352997 cites W2265042566 @default.
- W2024352997 cites W2591733255 @default.
- W2024352997 cites W2963143040 @default.
- W2024352997 cites W3098588194 @default.
- W2024352997 cites W3098988146 @default.
- W2024352997 cites W3099149995 @default.
- W2024352997 cites W3099950419 @default.
- W2024352997 cites W3100196563 @default.
- W2024352997 cites W3100316450 @default.
- W2024352997 cites W3101131370 @default.
- W2024352997 cites W3101223162 @default.
- W2024352997 cites W3102771142 @default.
- W2024352997 cites W3103291630 @default.
- W2024352997 cites W3103457832 @default.
- W2024352997 cites W3103536668 @default.
- W2024352997 cites W3104456033 @default.
- W2024352997 cites W3105210708 @default.
- W2024352997 cites W3105299643 @default.
- W2024352997 cites W3122687038 @default.
- W2024352997 cites W4290987347 @default.
- W2024352997 cites W4300887319 @default.
- W2024352997 doi "https://doi.org/10.1088/0004-637x/801/2/96" @default.
- W2024352997 hasPublicationYear "2015" @default.
- W2024352997 type Work @default.
- W2024352997 sameAs 2024352997 @default.
- W2024352997 citedByCount "51" @default.
- W2024352997 countsByYear W20243529972015 @default.
- W2024352997 countsByYear W20243529972016 @default.
- W2024352997 countsByYear W20243529972017 @default.