Neutral hydrogen observations of ARP 144
1988; IOP Publishing; Volume: 326; Linguagem: Inglês
10.1086/166075
ISSN1538-4357
Autores Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (9) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Neutral Hydrogen Observations of ARP 144 Higdon, James L. Abstract A search was made for the giant intergalactic neutral hydrogen cloud (IGC) proposed by Freeman and de Vaucouleurs to be responsible for the peculiar galaxy system Arp 144 (NGC 7828 and NGC 7829). VLA 21 cm D-configuration observations disclosed the presence of a total of 5.6 x 10^9^h^-2^ M_sun_ of neutral hydrogen-nearly half of which resides in two main structures extending as far as 98h^-1^ kpc from Arp 144. An additional amount of H I flux resides outside the velocity range covered by these observations. The overall H I distribution is consistent with the Freeman and de Vaucouleurs model. It may be possible to identify one of the large neutral hydrogen features as part of the IGC, with the other arising from tidal forces. An alternate hypothesis which views Arp 144 as an ongoing merger between the galaxies NGC 7828 and NGC 7829 is also considered. Publication: The Astrophysical Journal Pub Date: March 1988 DOI: 10.1086/166075 Bibcode: 1988ApJ...326..146H Keywords: Galactic Structure; Hydrogen Clouds; Intergalactic Media; Peculiar Galaxies; Radio Sources (Astronomy); Astronomical Maps; Disk Galaxies; H I Regions; Spiral Galaxies; Astrophysics; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 7828; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 7829; GALAXIES: INDIVIDUAL NAME: ARP 144; GALAXIES: INTERACTIONS; INTERGALACTIC MEDIUM; RADIO SOURCES: 21 CM RADIATION full text sources ADS | data products SIMBAD (11) NED (7)
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