Updating to 4 01 m33
While we can rule out interstellar pressure as the major contributing factor, we are unable to disentangle the relative effects of metallicity and H velocity dispersion.
We find a reasonably featureless number density profile with galactocentric radius, and weak correlations between galactocentric radius and dust temperature/mass.
This convention is YYYY-MMa, where YYYY is the year and MM is the 2-digit month of discovery, and 'a' is a lower-case letter (a, b, c, etc.) representing the order of discovery within that month. ) (= ATLAS19rmf) (= PNV J00423828 4113423), CBAT TOCP discovered 2019/08/04.577 by Koichi Itagaki Found in M31 at R.
Novae in the megellanic clouds are named with the year followed by a number. Pietsch's M31 (apparent) optical nova catalogue, M33 novae catalog, and M81 novae catalog Please note that I do not keep track of galactic novae.
M33 is the second most luminous spiral (SA(s)cd) galaxy in our neighbourhood after M31. (2008), (3) Galleti, Bellazzini & Ferraro (2004), (4) Magrini et al. The particular structure (star streams) seen in M33 could be associated with this history of mergers and interactions. (2013) around M31 and M33 can only be explained by these interactions.
With an absolute magnitude of ∼ −19.3, it presents several arms (Sandage & Humphreys 1980). In fact, many of the structures presented in Mc Connachie et al. Deep Hα observations of M33 reveal the presence of low-density H regions outside the optical disc (Hoopes, Walterbos & Bothun 2001).
The M33 profile presents a small bulge-like component in the IR bands. The optical disc of M33 has a scalelength of ∼9.2 arcmin (2.25 kpc) in the References: (1) Mc Connachie et al. (2008), (3) Galleti, Bellazzini & Ferraro (2004), (4) Magrini et al. While, on large scales, -body cosmological simulations reproduce well the observations, it is more problematic at galaxy scales. Valcheva image) Mag 19.6:7/10 (16.7:7/8), Type He/N (References: ATEL 5092, 5099, 5123, 5145, 5257, 12915, 12943, TNS, ZTF observations, CBAT TOCP) AT2019kli (= ASASSN-19qv), TNS discovered 2019/07/04.290 by All Sky Automated Survey for Super Novae (ASAS-SN) Found in SMC at R. = 41°14'12".5 Located 127".5 east and 116".0 south of the center of M31 (Kamil Hornoch image) (A. = -73°46'22".73 Located 3040".5 east and 3399".8 south of the center of SMC (Joseph Brimacombe image) Mag 14.2:7/4, Type Nova (References: ATEL 12907, 12917, 12938, 12990) AT2019iby (= ZTF19aawtdov) (= LPV J013232.49 303521.8), TNS discovered 2019/06/20.445 by Zwicky Transient Facility (ZTF) Found in M33 at R. (= PNV J00424173 4117537) (= PNV J00424176 4117534), ATEL 12895 discovered 2019/06/27.065 by Kamil Hornoch and Peter Kusnirak Found in M31 at R. ) (= PNV J00455384 4217028) (= ATLAS19ocz), CBAT TOCP discovered 2019/06/25.626 by Koichi Itagaki Found in M31 at R. (= PNV J09554664 6902473), ATEL 12859 discovered 2019/06/09.875 by Kamil Hornoch et al. However, it is the rising inner part of the RCs that constrains the parameters of the mass models (see e.g. The objective of this project is to perform a new mass distribution model of Messier 33 (M33), combining high-sensitivity Hα and H interferometric data. (2004), (8) An, Terndrup & Pinsonneault (2007), (9) Freedman et al. 2009), confirms that there were many mergers and interactions between them.In particular, this article presents the first Hα survey devoted to the large-scale distribution and kinematics of the M33 ionized gas disc. The discovery of dwarf galaxies around the Milky Way and M31 and the tidal streams between M31 and M33 (PAn DAS) confirm our ideas about galaxy formation.