The Widefield Arecibo Virgo Extragalactic Survey. I. New Structures in the ALFALFA Virgo 7 Cloud Complex and an Extended Tail on NGC 4522

0518365 - ASÚ 2020 RIV US eng J - Článek v odborném periodiku
Minchin, R.F. - Taylor, Rhys - Koeppen, J. - Davies, J. - van Driel, W. - Keenan, O.
The Widefield Arecibo Virgo Extragalactic Survey. I. New Structures in the ALFALFA Virgo 7 Cloud Complex and an Extended Tail on NGC 4522.
Astronomical Journal. Roč. 158, č. 3 (2019), č. článku 121. ISSN 0004-6256. E-ISSN 1538-3881
Grant CEP: GA ČR(CZ) GA19-18647S
Institucionální podpora: RVO:67985815
Klíčová slova: galaxies * clusters * radio lines
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.840, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.3847/1538-3881/ab303e

We are carrying out a sensitive blind survey for neutral hydrogen (HI) in the Virgo cluster and report here on the first 5 degrees x 1 degrees area covered, which includes two optically-dark gas features: the five-cloud ALFALFA Virgo 7 complex (Kent et al. 2007, 2009) and the stripped tail of NGC 4522 (Kenney et al. 2004). We discover a sixth cloud and low velocity gas that extends the velocity range of the complex to over 450 km/s(-1), find that around half of the total HI flux comes from extended emission rather than compact clouds, and see around 150 percent more gas, raising the total HI mass from 5.1 x 10(8) M-circle dot to 1.3 x 10(9) M-circle dot.
Trvalý link: http://hdl.handle.net/11104/0303521