The Galaxy-Quasar Connection: NGC 4319 and Markarian 205. II. Spectroscopy
1987; IOP Publishing; Volume: 319; Linguagem: Inglês
10.1086/165490
ISSN1538-4357
Autores Tópico(s)Astrophysical Phenomena and Observations
Resumoview Abstract Citations (20) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Galaxy-Quasar Connection: NGC 4319 and Markarian 205. II. Spectroscopy Sulentic, Jack W. ; Arp, Halton Abstract New spectroscopic data are presented for the disturbed spiral galaxy NGC 4319 and the high-redshift, quasar-like object Markarian 205. Spectra taken at various positions in the galaxy are image processed and analyzed in detail. Surprisingly, there is almost no Hα emission present. Instead, the emission lines of [N II] λλ6548, 6584 are widely detected, pointing to the presence of a low-density shock-excited gas (Hα/[N II] λ6584 < 0.3). The spectra yield a partial velocity field in the disk of NGC 4319 which shows that an arc of gas near the UV knot, and opposite Mrk 205, is expanding with a velocity V ≈ 10 3 km s-1. The UV knot itself shows a possible expansion velocity near 70 km s-1. The above evidence suggests (1) that NGC 4319 is an internally active spiral galaxy and (2) that the high-density gas has been explosively removed from the disk of the galaxy. The discovery of the expanding gas (and UV knot) opposite Mrk 205, along with the generally directed and two-sided character of ejection events in galaxies, supports the conclusion that Mrk 205 was ejected from NGC 4319. Publication: The Astrophysical Journal Pub Date: August 1987 DOI: 10.1086/165490 Bibcode: 1987ApJ...319..693S Keywords: GALAXIES: INDIVIDUAL NGC NUMBER: NGC 4319; QUASARS full text sources ADS | data products NED (3) SIMBAD (2) Related Materials (1) Part 1: 1987ApJ...319..687S
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